J
Jimmy
★★★★★
“Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
ENGINEMARKET
Mercedes Benz ENGINE MARKETPLACE
Mercedes Benz GLA Class Engine ReplacementCompare Prices & Save
Get quotes today from trusted UK Mercedes Benz GLA Class engine specialists. Compare prices on reconditioned, rebuilt and used engines - supply & fit available nationwide.
GLA Diesel Engines - from £1,800 to £4,500
-> Rebuilt units from £2,200 · Common codes: OM651, OM654, OM608
GLA Petrol Engines - from £1,500 to £4,200
-> Rebuilt units from £1,800 · Common codes: M270, M260, M282
GLA AMG Performance Engines - from £4,500 to £12,000
-> Rebuilt units from £5,500 · Common codes: M133, M139
🔒 Secure enquiry - no spam, no pressure. Genuine quotes only from vetted UK Mercedes Benz GLA Class specialists.
● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|
● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|
How It Works
3 Simple Stepsto Finding the Best Mercedes Benz GLA Class Replacement Engine
Get Instant Quotes from Mercedes - Benz Engine Specialists Across the UK - 100% free, no obligation. Most replacements completed within 3-5 days.
Most replacements completed within 3-5 days.
12-Month Warranty
Supply & Fit Available
Nationwide Delivery
Trusted UK Suppliers
Live UK Engine Market Data
What Are UK Drivers Paying for Mercedes Benz GLA Class Engine Replacement?
The table below shows typical UK rebuilt engine costs across Mercedes Benz GLA Class variants, covering documented failure causes, chassis generations, engine codes, and fuel types based on current market data.
Average Market Prices
- Mercedes Benz GLA Class (H247) GLA 200 d2020-present£2,500-£5,500EGR cooler crackingOM654 DE20 GADiesel 2.0L
- Mercedes Benz GLA Class (H247) GLA 220 d2020-present£2,800-£6,000EGR valve failureOM654 DE20 GADiesel 2.0L
- Mercedes Benz GLA Class (H247) GLA 250 e2020-present£3,500-£7,200HV battery degradationM282 + EMPHEV 1.3L
- Mercedes Benz GLA Class (H247) GLA 35 AMG2020-present£3,500-£7,800Oil consumptionM260 DE20 ALPetrol 2.0L
- Mercedes Benz GLA Class (X156) GLA 2002013-2020£1,500-£3,800High-pressure pump failM270 DE16 ALPetrol 1.6L
- Mercedes Benz GLA Class (X156) GLA 2502013-2020£1,800-£4,200Timing chain tensionerM270 DE20 ALPetrol 2.0L
- Mercedes Benz GLA Class (X156) GLA 200 CDI2013-2019£1,600-£4,000Injector carbon buildupOM651 DE22 LADiesel 2.1L
- Mercedes Benz GLA Class (X156) GLA 220 CDI2013-2019£1,800-£4,500Timing chain stretchOM651 DE22 LADiesel 2.1L
- Mercedes Benz GLA Class (X156) GLA 45 AMG2014-2017£3,800-£8,500Turbo bearing failureM133 DE20 ALPetrol 2.0L
- Mercedes Benz GLA Class (X156) GLA 45 AMG2017-2020£4,200-£9,000Oil feed line clogM133 DE20 ALPetrol 2.0L
- Mercedes Benz GLA Class (H247) GLA 1802020-present£2,200-£4,500Timing belt wearM282 DE14 ALPetrol 1.3L
- Mercedes Benz GLA Class (H247) GLA 2002020-present£2,000-£4,800High-pressure pump failM282 DE14 ALPetrol 1.3L
Last updated: 22 May, 14:59
Customer Reviews
Trusted by Mercedes Benz GLA Class OwnersAcross the UK
★★★★★
4.8 out of 5
Rated 4.8 out of 5 by 1,081 verified customers who sourced reconditioned and used Mercedes Benz GLA Class engines through EngineMarket.
P
Pete
★★★★★
“Got three quotes within an hour and chose the best deal easily. The whole process was quick, clear and stress-free.”
S
Sophie
★★★★★
“I wasn't sure what I needed, but they helped me identify the right engine and connected me with a trusted garage.”
Google
★★★★★
“
Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
- Jimmy, London
Highly Rated Experience - Leave a Review
Leave a review → - Your feedback helps other Mercedes Benz GLA Class owners find trusted engine specialists.
Models We Cover
Mercedes Benz GLA Class Engine ReplacementAll Variants Covered
From the economical GLA 180d to the high-performance AMG GLA 45, our network of UK Mercedes Benz GLA Class engine specialists helps you compare rebuilt, reconditioned and used engine prices. Typical price range for a rebuilt unit with 12-month warranty is £1,500-£9,000, with supply & fit available nationwide.
Core Diesel Range
Specs136hp
Years2013-2019
Rebuilt£1,600-£4,000
Core Petrol Range
Performance & Hybrid Range
Variant Directory
All Mercedes Benz GLA Class Variants - Engine Replacement Coverage
A full alphabetical listing of every Mercedes Benz GLA Class trim covered by our network. All entries link to a dedicated variant page, where prices are further broken down by engine code, model year, and condition type. Click a live link to compare quotes.
Diesel Variants
GLA 180 dGLA 180 d 4MATICGLA 200 CDIGLA 200 dGLA 200 d 4MATICGLA 200 d 4MATIC AMG LineGLA 200 d 4MATIC PremiumGLA 200 d 4MATIC Premium PlusGLA 200 d AMG LineGLA 200 d SEGLA 200 d SportGLA 220 CDIGLA 220 CDI 4MATICGLA 220 dGLA 220 d 4MATIC
Petrol Variants
GLA 180GLA 180 AGLA 180 AMG LineGLA 180 SEGLA 180 SportGLA 200GLA 200 4MATICGLA 200 AMG LineGLA 200 A Star EditionGLA 200 SEGLA 200 SportGLA 200 WhiteArt EditionGLA 220GLA 220 4MATICGLA 250GLA 250 4MATICGLA 250 4MATIC AMG LineGLA 250 eGLA 250 e AGLA 250 e A Star Edition
Performance Variants
AMG GLA 35AMG GLA 35 4MATICAMG GLA 45AMG GLA 45 4MATICAMG GLA 45 SAMG GLA 45 S 4MATICAMG GLA 45 Yellow Night EditionHybrid / Plug-In Hybrid VariantsGLA 250 eGLA 250 e AGLA 250 e A Star EditionGLA 250 e AMG Line
Engine Codes
Mercedes Benz GLA Class Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the Mercedes Benz GLA Class across all generations, with technical specs, compatible variants and trims, known failure points, and average rebuilt prices from UK specialists. Select any engine code to compare quotes.
Diesel Engines
Extracted from detailed diesel engine families across Mercedes Benz GLA Class variants.
Petrol Engines
Extracted from detailed petrol and performance engine families across Mercedes Benz GLA Class variants.
Hybrid / Electrified Engines
Extracted from electrified powertrains and hybrid engine families used in Mercedes Benz GLA Class variants.
Can't find your engine code?
Can’t find your engine code? Enter your registration number above - we’ll instantly identify the exact unit, its technical specifications, and live replacement prices from UK Mercedes Benz GLA Class engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.
Common Problems
Mercedes Benz GLA Class Engine Problems
What It Costs to Fix & When Replacement Makes Sense
The Mercedes Benz GLA Class diesel range - particularly the OM651 2.1-litre fitted to 200 CDI and 220 CDI variants - dominates UK replacement enquiries, with timing chain stretch and injector carbon buildup the most frequently cited failures. Petrol GLA 200 and 250 owners search for M270 high-pressure pump and tensioner issues, while second-generation H247 diesels (OM654) bring EGR cooler thermal cracking into focus. Every rebuilt engine supplied through EngineMarket includes upgraded internal components designed to address the original failure point, plus a minimum 12-month unlimited mileage warranty. Below, we break down the most common GLA Class engine failures, what repair costs look like at dealer vs specialist rates, and when replacement is the only sensible option.
Every rebuilt engine includes a minimum 12-month unlimited mileage warranty.
1. Mercedes Benz GLA Class OM651 Timing Chain Stretch
Why 2.1-Litre Diesel Engines Rattle on Cold Start
Affected Models
Mercedes Benz GLA Class 200 CDI, 220 CDI, 220 CDI 4MATIC (2013-2019, OM651 DE22 LA)
Typical Failure Mileage
80,000-120,000 miles
Root Cause
The OM651 uses a single timing chain located at the rear of the engine block, running from crank to camshafts via a secondary chain. Insufficient oil pressure during cold starts, combined with chain guide wear, leads to elongation of the primary chain. Once the tensioner exceeds its adjustment range, chain slap against the timing cover produces the characteristic rattle.
Repair Options & Estimated Costs (UK ranges)
| Repair Tier | Dealer Price | Specialist Price | What It Involves | Longevity / Suitability |
|---|---|---|---|---|
Minor - Preventative Chain Replacement Minor | £1,400 - £2,200 | £800 - £1,300 | Replace timing chain, tensioner, guides, and sprockets with upgraded components | 80,000-120,000 miles. Only viable if chain has not jumped teeth and guides are still intact |
Intermediate - Cylinder Head Off Intermediate | £3,000 - £4,500 | £1,800 - £2,800 | Chain replacement plus cylinder head removal to clear debris and inspect valves after timing slip | 60,000-80,000 miles. Required when engine has been run with audible chain rattle |
Full Replacement - Rebuilt Engine Best Value | £5,500 - £7,500 | £3,500 - £5,500 | Supply & fit of rebuilt OM651 engine with upgraded timing components, new oil pump, injector seals, and full bench test | 100,000+ mile lifespan. The definitive solution when guides have failed or chain has snapped |
Our Recommendation
Best next step for mercedes benz gla class om651 timing chain stretch
If your GLA 220 CDI rattles only for 1-2 seconds on cold start, catch it early with a preventative chain replacement at a specialist - you'll save £2,000-£3,000 versus waiting for full engine failure. On a GLA worth £8,000-£15,000 with over 110,000 miles already, a rebuilt engine with upgraded timing components often delivers better long-term value than spending £1,800 on repairs that leave the rest of a high-mileage unit in place.
Don't Let Engine Failure Write Off Your Mercedes Benz GLA Class
From OM651 timing chain stretch to M270 HPFP failure and OM654 EGR cooler cracking, GLA Class engine problems are well-documented and entirely manageable - provided you get honest pricing from specialists who know these engines. EngineMarket makes it simple to compare prices from trusted UK Mercedes Benz GLA Class specialists, whether you need a preventative chain replacement, a turbocharger swap, or a fully rebuilt engine with upgraded components. Every engine supplied through our network carries a minimum 12-month unlimited mileage warranty, with nationwide delivery and supply & fit options available. Compare prices today, avoid the main dealer premium, and get your GLA Class back on the road with confidence.
Compare Mercedes Benz GLA Class Engine Replacement Prices Now →Mercedes Benz GLA Class Engine Problems
What It Costs to Fix & When Replacement Makes Sense
The Mercedes Benz GLA Class diesel range - particularly the OM651 2.1-litre fitted to 200 CDI and 220 CDI variants - dominates UK replacement enquiries, with timing chain stretch and injector carbon buildup the most frequently cited failures. Petrol GLA 200 and 250 owners search for M270 high-pressure pump and tensioner issues, while second-generation H247 diesels (OM654) bring EGR cooler thermal cracking into focus. Every rebuilt engine supplied through EngineMarket includes upgraded internal components designed to address the original failure point, plus a minimum 12-month unlimited mileage warranty. Below, we break down the most common GLA Class engine failures, what repair costs look like at dealer vs specialist rates, and when replacement is the only sensible option.
Affected Models
Mercedes Benz GLA Class 200 CDI, 220 CDI, 220 CDI 4MATIC (2013-2019, OM651 DE22 LA)
Typical Failure Mileage
80,000-120,000 miles
Root Cause
The OM651 uses a single timing chain located at the rear of the engine block, running from crank to camshafts via a secondary chain. Insufficient oil pressure during cold starts, combined with chain guide wear, leads to elongation of the primary chain. Once the tensioner exceeds its adjustment range, chain slap against the timing cover produces the characteristic rattle.
Minor - Preventative Chain Replacement
Dealer
£1,400 - £2,200
Specialist
£800 - £1,300
Replace timing chain, tensioner, guides, and sprockets with upgraded components
80,000-120,000 miles. Only viable if chain has not jumped teeth and guides are still intact
Intermediate - Cylinder Head Off
Dealer
£3,000 - £4,500
Specialist
£1,800 - £2,800
Chain replacement plus cylinder head removal to clear debris and inspect valves after timing slip
60,000-80,000 miles. Required when engine has been run with audible chain rattle
Full Replacement - Rebuilt Engine
Dealer
£5,500 - £7,500
Specialist
£3,500 - £5,500
Supply & fit of rebuilt OM651 engine with upgraded timing components, new oil pump, injector seals, and full bench test
100,000+ mile lifespan. The definitive solution when guides have failed or chain has snapped
Our Recommendation
Best next step for mercedes benz gla class om651 timing chain stretch
If your GLA 220 CDI rattles only for 1-2 seconds on cold start, catch it early with a preventative chain replacement at a specialist - you'll save £2,000-£3,000 versus waiting for full engine failure. On a GLA worth £8,000-£15,000 with over 110,000 miles already, a rebuilt engine with upgraded timing components often delivers better long-term value than spending £1,800 on repairs that leave the rest of a high-mileage unit in place.
Don't Let Engine Failure Write Off Your Mercedes Benz GLA Class
From OM651 timing chain stretch to M270 HPFP failure and OM654 EGR cooler cracking, GLA Class engine problems are well-documented and entirely manageable - provided you get honest pricing from specialists who know these engines. EngineMarket makes it simple to compare prices from trusted UK Mercedes Benz GLA Class specialists, whether you need a preventative chain replacement, a turbocharger swap, or a fully rebuilt engine with upgraded components. Every engine supplied through our network carries a minimum 12-month unlimited mileage warranty, with nationwide delivery and supply & fit options available. Compare prices today, avoid the main dealer premium, and get your GLA Class back on the road with confidence.
Compare Mercedes Benz GLA Class Engine Replacement Prices Now →Disclaimer: All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EngineMarket’s UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific Mercedes Benz GLA Class and engine code. Every engine supplied through EngineMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier.
12-Month Warranty
Upgraded Components
Nationwide UK Delivery
Save vs Main Dealer Price
Replacement Engine Options
Mercedes Benz GLA Class Engine TypesOptions, Costs & What to Expect
Every engine type for your Mercedes Benz GLA Class is available through our UK network, with typical price ranges varying by variant, engine code and your specific budget.
All engine types include a minimum 12-month unlimited mileage warranty when sourced through EngineMarket. Prices are typical UK market ranges based on historical quote data from our network and depend on exact engine code, variant, mileage and supplier. Use our free comparison tool above - enter your registration to get tailored quotes for your specific Mercedes Benz GLA Class within hours.
Engine Sizes
Mercedes Benz GLA Class Engines by SizeFind the Right Displacement for Your Variant
Every displacement fitted to the Mercedes Benz GLA Class across all UK generations is listed below, with compatible engine codes, variants, years, and common failure notes to help you identify your exact unit.
Mercedes Benz GLA Class Diesel Engine Sizes
The Renault-sourced OM608 1.5-litre diesel appeared in late X156-generation GLA models (2018-2020) as an entry-level efficiency option for buyers prioritising fuel economy over performance. Shared with the Renault K9K family, this unit was the smallest diesel ever fitted to the GLA Class and remains a rare but cost-effective replacement candidate for low-mileage urban cars.
| Engine Code(s) | OM608 |
| Compatible Models (UK) | GLA 180 d, GLA 180 d SE, GLA 180 d Urban |
| Production Years | X156, 2018-2020 |
Common Failure Points
Watch for these known weak points
Timing chain stretch from Renault-sourced design, EGR valve clogging on short journeys, injector seal failure
Not sure which engine size your Mercedes Benz GLA Class needs? Enter your registration number above - we'll identify the exact displacement, engine code and compatible replacement options instantly. All engines supplied through EngineMarket include a minimum 12-month unlimited mileage warranty from UK Mercedes Benz GLA Class specialists.
Mercedes Benz GLA Class Engines Fuel Type
Mercedes Benz GLA Class Engines by Fuel Type
Choose your Mercedes Benz GLA Class engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from early OM651 diesel to the latest M139 AMG petrol and plug-in hybrid.
Mercedes Benz GLA Class Diesel Engines
Mercedes Benz GLA Class Diesel Engines
Diesel engines dominated first-generation GLA sales, with the OM651 2.1-litre driving the vast majority of UK replacement enquiries - particularly on 220 CDI variants affected by timing chain stretch.
Common Engine Families
OM651 - 2.1-litre four-cylinder, backbone of X156 diesel range (200 CDI, 220 CDI), timing chain and injector failure hotspots
OM654 - 2.0-litre modular diesel, H247 generation (200 d, 220 d), EGR cooler cracking and AdBlue system issues
OM608 - 1.5-litre Renault-sourced unit, late X156 GLA 180 d only, timing chain stretch and EGR clogging
Found In
X156 (First Generation, 2013-2019) - OM651 2.1L, OM608 1.5L (late models)
H247 (Second Generation, 2020-present) - OM654 2.0L
Known For
Strong motorway torque and genuine 50+ mpg economy across all diesel variants
OM651 timing chain stretch requiring full replacement on 80k-120k mile cars
High UK replacement demand on GLA 220 CDI and GLA 200 d
OM654 EGR cooler thermal cracking on post-2020 H247 models
Typical Models (UK)
GLA 180 d (OM608, late X156)
GLA 200 CDI (OM651)
GLA 220 CDI / 220 CDI 4MATIC (OM651)
GLA 200 d / 200 d 4MATIC (OM654, H247)
GLA 220 d / 220 d 4MATIC (OM654, H247)
Not sure which fuel type your Mercedes Benz GLA Class has? Enter your registration number above to instantly identify your engine code, fuel system and compatible replacement options - all backed by a minimum 12-month unlimited mileage warranty from UK Mercedes Benz GLA Class specialists.
Engine Years
Mercedes Benz GLA Class Engines by YearWhat Was Fitted & When
From the first-generation X156 (2013) to the current H247 (2020 onwards), this timeline maps every major engine change across the GLA Class so you can identify your exact unit and compare rebuilt prices from UK specialists.
2013 - 2015 - X156 Launch: OM651 Diesel & M270 Petrol Arrive
Major Engine Change
The first-generation GLA launched on the MFA platform shared with A-Class and CLA, introducing the OM651 diesel that would dominate UK replacement enquiries for a decade.
Key Changes
GLA officially launched at Frankfurt Motor Show (September 2013)
UK deliveries began in early 2014 as 2014 model year
MFA platform with McPherson front struts, multi-link rear suspension
Available with front-wheel drive or 4MATIC all-wheel drive
6-speed manual or 7G-DCT dual-clutch transmission
Known For
First premium compact SUV from Mercedes based on A-Class underpinnings
OM651 timing chain stretch reported from 80,000-120,000 miles
Piezo injector carbon buildup causing hard starting when warm
0.29 Cd drag coefficient - class-leading at launch
Main Engines
OM651 DE22 LA - 2.1L diesel (GLA 200 CDI 136hp, GLA 220 CDI 170hp)
M270 DE16 AL - 1.6L petrol (GLA 200, 156hp)
M270 DE20 AL - 2.0L petrol (GLA 250, 211hp)
Popular Models
Mercedes Benz GLA 200 CDI
Mercedes Benz GLA 220 CDI / 220 CDI 4MATIC
Mercedes Benz GLA 200
Mercedes Benz GLA 250 / 250 4MATIC
Engine Codes Covered
OM651M270
Common Replacement Enquiries
Mercedes GLA 220 CDI engine replacement
OM651 timing chain failure cost
GLA 200 CDI injector problems
Get quotes for 2013-2015 Mercedes Benz GLA Class replacement engines
2013 - 2015 - X156 Launch: OM651 Diesel & M270 Petrol Arrive
Major Engine Change
The first-generation GLA launched on the MFA platform shared with A-Class and CLA, introducing the OM651 diesel that would dominate UK replacement enquiries for a decade.
Key Changes
GLA officially launched at Frankfurt Motor Show (September 2013)
UK deliveries began in early 2014 as 2014 model year
MFA platform with McPherson front struts, multi-link rear suspension
Available with front-wheel drive or 4MATIC all-wheel drive
6-speed manual or 7G-DCT dual-clutch transmission
Known For
First premium compact SUV from Mercedes based on A-Class underpinnings
OM651 timing chain stretch reported from 80,000-120,000 miles
Piezo injector carbon buildup causing hard starting when warm
0.29 Cd drag coefficient - class-leading at launch
Main Engines
OM651 DE22 LA - 2.1L diesel (GLA 200 CDI 136hp, GLA 220 CDI 170hp)
M270 DE16 AL - 1.6L petrol (GLA 200, 156hp)
M270 DE20 AL - 2.0L petrol (GLA 250, 211hp)
Engine Codes Covered
OM651M270
Popular Models
Mercedes Benz GLA 200 CDI
Mercedes Benz GLA 220 CDI / 220 CDI 4MATIC
Mercedes Benz GLA 200
Mercedes Benz GLA 250 / 250 4MATIC
Common Replacement Enquiries
Mercedes GLA 220 CDI engine replacement
OM651 timing chain failure cost
GLA 200 CDI injector problems
Get quotes for 2013-2015 Mercedes Benz GLA Class replacement engines
Year Finder
Not sure which year your Mercedes Benz GLA Class was built?
Not sure which year your Mercedes Benz GLA Class was built? Enter your registration number and we'll identify the exact engine, model year, and compatible replacement options instantly - all backed by a minimum 12-month warranty from UK Mercedes Benz GLA Class specialists.
FAQ
Mercedes Benz GLA Class Engine ReplacementFrequently Asked Questions
Question 1
Is the OM651 engine in the GLA 220 CDI reliable or should I avoid it?
The OM651 2.1-litre diesel is generally robust and can exceed 250,000 miles with proper maintenance, but it has two well-documented weak points: timing chain stretch and injector carbon buildup.
Key points
- • Timing chain tensioner can fail between 80,000-120,000 miles, causing rattle on cold start
- • Piezo injectors suffer carbon buildup, leading to hard starting when warm
- • Post-2015 OM651 units have improved chain guides and injector seals
- • With regular oil changes (MB 229.51 spec), these engines regularly exceed 200,000 miles
Question 2
How much does a Mercedes GLA Class engine replacement cost in the UK?
Expect £1,800-£4,500 for a rebuilt OM651 diesel, £1,500-£4,200 for a rebuilt M270 petrol, or £3,800-£12,000 for AMG GLA 45 units - supply only, excluding fitting.
Key points
- • OM651 2.1L diesel rebuilt: £1,800-£4,500 depending on variant and warranty
- • M270 1.6L/2.0L petrol rebuilt: £1,500-£4,200 based on mileage and condition
- • AMG M133/M139 performance engines: £3,800-£12,000 requiring specialist fitting
- • Add £400-£800 for supply and fit service nationwide
Question 3
What causes the M270 petrol engine to misfire on my GLA 200 or 250?
Worn inlet camshafts and camshaft lifter rollers are a documented failure on M270 engines, typically appearing between 65,000-115,000 miles across GLA, CLA and A-Class models.
Key points
- • Worn cam lobes and scored lifter rollers cause intermittent misfire - worse when hot
- • High-pressure fuel pump failure also common from 80,000-100,000 miles
- • Dual-mass flywheel rattle often misdiagnosed as engine fault
- • Regular oil changes with correct MB-spec oil critical for camshaft longevity
Question 4
Which Mercedes GLA engine is the most reliable?
The OM651 2.1-litre diesel - particularly the GLA 220 CDI - is widely considered the most reliable GLA engine, often exceeding 250,000-280,000 miles with proper servicing. The H247 OM654 diesel is also proving very robust.
Key points
- • GLA 220 CDI (OM651) benchmark for Mercedes diesel reliability
- • Post-2015 OM651 units have improved timing chain components
- • OM654 2.0L diesel (2020+) achieves 4.2-4.8L/100km with excellent reliability
- • Early M270 petrols less durable than diesel equivalents
Question 5
What is the typical lifespan of a Mercedes GLA Class engine?
OM651 diesels routinely reach 250,000-280,000 miles (350,000-450,000 km) with proper maintenance. M270 petrol engines typically last 150,000-200,000 km before major components need attention.
Key points
- • Well-maintained OM651 diesel: 250,000+ miles achievable
- • Average GLA lifespan: approximately 118,000-120,000 miles across all variants
- • Petrol turbo units generally need high-pressure pump or turbo work earlier
- • Regular oil changes every 15,000-25,000 km critical for longevity
Question 6
Should I replace my GLA engine or buy another car?
If your GLA is worth £8,000-£15,000 and needs a £2,000-£4,000 rebuilt engine, replacement often makes sense - especially for OM651 diesels that can run another 100,000+ miles after proper rebuild with upgraded components.
Key points
- • GLA values typically £8,000-£18,000 for first-generation X156 models
- • Rebuilt OM651 with upgraded pistons and timing components exceeds factory durability
- • Replacement often more cost-effective than buying another used GLA with unknown history
- • Get specialist quotes before deciding - dealer prices often double specialist rates
Question 7
What does the GLA timing chain tensioner failure sound like?
A failing timing chain tensioner produces a rattling, clanking or ticking noise from the engine - most noticeable on cold start before oil pressure builds. If ignored, the chain can derail causing catastrophic engine failure.
Key points
- • Rattle lasting 1-3 seconds on cold start - first warning sign
- • Persistent rattle when warm indicates advanced tensioner failure
- • Check engine light with cam/crank correlation codes confirms timing issues
- • Budget £800-£1,300 for specialist chain and tensioner replacement
Question 8
Are GLA petrol engines less reliable than diesels?
Yes - first-generation M270 petrol engines have more documented failure points (camshaft wear, HPFP failure, DMF issues) than OM651 diesels. Second-generation M282 and M260 units with mild hybrid tech are proving more reliable.
Key points
- • OM651 diesel: "very good" reliability rating across owner surveys
- • M270 petrol: "moderate" rating due to HPFP and camshaft issues
- • H247 petrols (M282, M260) showing "good to very good" reliability so far
- • Diesel更适合 high-mileage drivers, petrol better for urban/low-mileage use
Question 9
What's the difference between reconditioned, rebuilt and used GLA engines?
Reconditioned engines are stripped to bare block and rebuilt to factory spec with new parts (£2,200-£5,500). Rebuilt engines replace failed components only (£1,800-£4,500). Used engines are salvaged units with no internal work (£1,200-£3,200).
Key points
- • Reconditioned: fully machined, new pistons/rings/bearings, 12-month warranty
- • Rebuilt: new gaskets, chains, problem components only - shorter turnaround
- • Used: as-removed from donor vehicle - cheapest but limited warranty
- • Supply & fit adds £400-£800 to any option
Question 10
Can an A-Class or CLA engine fit my GLA Class?
Yes - the GLA shares the MFA platform with A-Class and CLA, so OM651, M270 and M282 engines are mechanically interchangeable. However, engine mounts, ECU mapping and ancillaries differ - always verify compatibility before purchase.
Key points
- • Same engine codes used across A, B, CLA and GLA models
- • Engine mounts, wiring looms, and ECUs are GLA-specific
- • 4MATIC drivetrain affects sump and transmission compatibility
- • Always provide VIN when ordering - cross-platform fitment requires verification
Why Choose Us
Why UK Mercedes Benz GLA Class Owners Trust EngineMarket
Join thousands of UK drivers who compare Mercedes Benz GLA Class engine prices through our network of trusted specialists - every rebuilt and reconditioned unit backed by a minimum 12‑month unlimited mileage warranty and nationwide delivery.
Compare Mercedes Benz GLA Class engine prices with vetted UK specialists
Compare engine prices for Mercedes Benz GLA Class in the UK and get competitive quotes from garages near you.
100% FreeNo ObligationFast & secure processUK-based support
Trusted supplier network
Warranty-backed rebuilt & used options
Every quote checked for fitment, quality and lead time.