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“Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
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Mercedes Benz CLA Engine ReplacementCompare Prices & Save
Get quotes today from trusted UK Mercedes Benz CLA engine specialists. Compare prices on reconditioned, rebuilt and used engines - supply & fit available nationwide.
CLA Diesel Engines - from £1,800 to £4,500
-> Rebuilt units from £2,200 · Common codes: OM654, OM651, N47D20C, OM607
CLA Petrol Engines - from £1,500 to £4,200
-> Rebuilt units from £1,800 · Common codes: M270, M260, M282, B48B20
CLA AMG Performance Engines - from £4,500 to £12,000
-> Rebuilt units from £4,500 · Common codes: M133, M139, M260 DE20 LA
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3 Simple Stepsto Finding the Best Mercedes Benz CLA Replacement Engine
Get Instant Quotes from Mercedes - Benz Engine Specialists Across the UK - 100% free, no obligation. Most replacements completed within 3-5 days.
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Live UK Engine Market Data
What Are UK Drivers Paying for Mercedes Benz CLA Engine Replacement?
The table below shows typical UK rebuilt engine replacement costs across Mercedes Benz CLA variants, covering documented failure causes, chassis codes, fuel types, and engine sizes based on current market data.
Average Market Prices
- Mercedes Benz CLA (C117) CLA 220 CDI2013-2015£1,300-£2,900Timing chain wearOM651Diesel 2.1L
- Mercedes Benz CLA (C117) CLA 220d2015-2019£2,200-£2,800EGR cooler failureN47D20CDiesel 2.0L
- Mercedes Benz CLA (C117) CLA 200d2013-2019£1,800-£2,500Swirl flap failureOM651Diesel 2.1L
- Mercedes Benz CLA (C117) CLA 180d2013-2019£1,500-£2,400Injector seal leakOM607Diesel 1.5L
- Mercedes Benz CLA (C117) CLA 2002013-2019£1,200-£2,200High-pressure pump failM270Petrol 1.6L
- Mercedes Benz CLA (C117) CLA 2502013-2019£1,800-£3,200Camshaft adjuster wearM270Petrol 2.0L
- Mercedes Benz CLA (C117) CLA 45 AMG2015-2019£4,500-£8,000Turbo bearing failureM133Petrol 2.0L
- Mercedes Benz CLA (C118) CLA 200d2019-2023£2,200-£3,800Timing chain stretchOM654Diesel 2.0L
- Mercedes Benz CLA (C118) CLA 220d2019-2025£2,000-£4,200Oil pump failureOM654Diesel 2.0L
- Mercedes Benz CLA (C118) CLA 1802019-2025£1,800-£3,500VANOS complexityM282Petrol 1.3L
- Mercedes Benz CLA (C118) CLA 2002019-2025£3,000-£3,500Oil consumptionB48B20APetrol 2.0L
- Mercedes Benz CLA (C118) CLA 2502019-2023£2,500-£4,500Piston ring failureM260Petrol 2.0L
- Mercedes Benz CLA (C118) CLA 45 S AMG2019-2025£6,000-£11,000Cylinder head warpM139Petrol 2.0L
- Mercedes Benz CLA (C118) CLA 250e2020-2025£4,000-£7,000Hybrid battery failureM282 + EMHybrid 1.3L
Last updated: 22 May, 14:59
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Models We Cover
Mercedes Benz CLA Engine ReplacementAll Variants Covered
From the economical CLA 180d to the high-performance CLA 45 S AMG, our network of UK Mercedes Benz CLA 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-£8,000 - supply & fit available nationwide.
Core Diesel Range
Specs109hp
Years2013-2019
Rebuilt£1,500-£2,400
Core Petrol Range
Performance & Hybrid Range
Variant Directory
Diesel Variants
CLA 180dCLA 200dCLA 200d Shooting BrakeCLA 220 CDICLA 220dCLA 220d 4MATICCLA 220d Shooting Brake
Petrol Variants
CLA 180CLA 180 Shooting BrakeCLA 200CLA 200 4MATICCLA 200 Shooting BrakeCLA 220CLA 220 4MATICCLA 250CLA 250 4MATICCLA 250 Shooting BrakeCLA 250eCLA 250e Shooting Brake
Performance Variants
CLA 35 AMGCLA 35 AMG 4MATICCLA 35 AMG Shooting BrakeCLA 45 AMGCLA 45 AMG 4MATICCLA 45 S AMGCLA 45 S AMG 4MATICCLA 45 S AMG Shooting Brake
Engine Codes
Mercedes Benz CLA Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the Mercedes Benz CLA 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 CLA variants.
Petrol Engines
Extracted from detailed petrol and performance engine families across Mercedes Benz CLA variants.
Hybrid / Electrified Engines
Extracted from electrified powertrains and hybrid engine families used in Mercedes Benz CLA 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 CLA engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.
Common Problems
Mercedes Benz CLA Engine Problems
What It Costs to Fix & When Replacement Makes Sense
The Mercedes Benz CLA, particularly the C117 generation, has established clear engine failure patterns that UK owners need to understand. The N47D20C diesel unit dominates replacement enquiries due to timing chain failures, while M270 petrol variants and M133 AMG engines have their own known weak points. 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 CLA engine failures, what repair actually costs at a dealer versus a specialist, and when full replacement is the only sensible option.
Every rebuilt engine includes a minimum 12-month unlimited mileage warranty.
1. Mercedes Benz CLA Timing Chain Failure
Why N47 Diesel Engines Rattle and Fail
Affected Models
Mercedes Benz CLA 220d, CLA 220d Shooting Brake (2015-2019, N47D20C)
Typical Failure Mileage
60,000 - 100,000 miles
Root Cause
Repair Options & Estimated Costs (UK ranges)
| Repair Tier | Dealer Price | Specialist Price | What It Involves | Longevity / Suitability |
|---|---|---|---|---|
Minor - Preventative Chain & Tensioner Replacement Minor | £2,200 - £2,800 | £1,400 - £1,900 | Replace timing chain, tensioner, guides, and sprockets (gearbox removal required). | 60,000-80,000 miles if done before chain stretch. Only viable if engine has not jumped timing. |
Full Replacement - Rebuilt Engine Best Value | £4,500 - £5,500 | £2,800 - £3,800 | Supply & fit fully rebuilt engine with upgraded tensioner and chain components. Bench tested, 12-month warranty. | 100,000+ miles. The definitive fix when chain has slipped or engine has interference damage. |
Our Recommendation
Best next step for mercedes benz cla timing chain failure
On a Mercedes Benz CLA 220d worth £4,000-£7,000, preventative chain replacement is almost always the better value if you catch the rattle early - typically £1,400-£1,900 at a specialist versus £2,200-£2,800 at a dealer. However, once the chain has stretched to the point of timing errors or no-start conditions, replacement is the only safe route. We see too many owners chasing cheap repairs after failure; it rarely ends well.
Don't Let Engine Failure Write Off Your Mercedes Benz CLA
Engine failure on a CLA doesn't have to mean the end of the car. Whether you're dealing with N47 timing chain rattle, M133 turbo failure, or M270 HPFP collapse, EngineMarket makes it simple to compare prices from trusted UK Mercedes Benz CLA specialists. Every rebuilt engine includes upgraded components designed to prevent the original failure from recurring, backed by a minimum 12-month unlimited mileage warranty. Compare prices today and get back on the road without the main dealer premium.
Compare Mercedes Benz CLA Engine Replacement Prices Now →Mercedes Benz CLA Engine Problems
What It Costs to Fix & When Replacement Makes Sense
The Mercedes Benz CLA, particularly the C117 generation, has established clear engine failure patterns that UK owners need to understand. The N47D20C diesel unit dominates replacement enquiries due to timing chain failures, while M270 petrol variants and M133 AMG engines have their own known weak points. 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 CLA engine failures, what repair actually costs at a dealer versus a specialist, and when full replacement is the only sensible option.
Affected Models
Mercedes Benz CLA 220d, CLA 220d Shooting Brake (2015-2019, N47D20C)
Typical Failure Mileage
60,000 - 100,000 miles
Root Cause
Minor - Preventative Chain & Tensioner Replacement
Dealer
£2,200 - £2,800
Specialist
£1,400 - £1,900
Replace timing chain, tensioner, guides, and sprockets (gearbox removal required).
60,000-80,000 miles if done before chain stretch. Only viable if engine has not jumped timing.
Full Replacement - Rebuilt Engine
Dealer
£4,500 - £5,500
Specialist
£2,800 - £3,800
Supply & fit fully rebuilt engine with upgraded tensioner and chain components. Bench tested, 12-month warranty.
100,000+ miles. The definitive fix when chain has slipped or engine has interference damage.
Our Recommendation
Best next step for mercedes benz cla timing chain failure
On a Mercedes Benz CLA 220d worth £4,000-£7,000, preventative chain replacement is almost always the better value if you catch the rattle early - typically £1,400-£1,900 at a specialist versus £2,200-£2,800 at a dealer. However, once the chain has stretched to the point of timing errors or no-start conditions, replacement is the only safe route. We see too many owners chasing cheap repairs after failure; it rarely ends well.
Don't Let Engine Failure Write Off Your Mercedes Benz CLA
Engine failure on a CLA doesn't have to mean the end of the car. Whether you're dealing with N47 timing chain rattle, M133 turbo failure, or M270 HPFP collapse, EngineMarket makes it simple to compare prices from trusted UK Mercedes Benz CLA specialists. Every rebuilt engine includes upgraded components designed to prevent the original failure from recurring, backed by a minimum 12-month unlimited mileage warranty. Compare prices today and get back on the road without the main dealer premium.
Compare Mercedes Benz CLA 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 CLA 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 CLA Engine TypesOptions, Costs & What to Expect
Every engine type for the Mercedes Benz CLA is available through our UK network, with typical price ranges based on your exact variant, engine code and 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 CLA within hours.
Engine Sizes
Mercedes Benz CLA Engines by SizeFind the Right Displacement for Your Variant
Every factory displacement fitted to the Mercedes Benz CLA across C117 and C118 generations, listed with compatible engine codes, variants, power outputs and common failure notes.
Mercedes Benz CLA Diesel Engine Sizes
The 1.5-litre OM607 diesel, sourced from Renault, powered entry-level CLA 180d models during the first-generation C117 production run (2013-2019). It prioritised fuel economy over refinement, returning over 70 mpg in real-world driving, but lacks the low-end torque of larger CLA diesel units. This engine is rare in the used market, as most CLA buyers opted for the 2.1-litre OM651.
| Engine Code(s) | OM607 DE15 LA |
| Compatible Models (UK) | CLA 180d, CLA 180d Shooting Brake |
| Production Years | C117, 2013-2019 |
Common Failure Points
Watch for these known weak points
Injector seal leakage, turbocharger variable vane seizure, DPF clogging on short journeys
Not sure which engine size your Mercedes Benz CLA 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 CLA specialists.
Mercedes Benz CLA Engines Fuel Type
Mercedes Benz CLA Engines by Fuel Type
Choose your Mercedes Benz CLA engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from the early C117 CLA 180d diesel to the latest C118 CLA 45 S AMG petrol.
Mercedes Benz CLA Diesel Engines
Mercedes Benz CLA Diesel Engines
Diesel powered the majority of first-generation C117 CLA sales in the UK, with the CLA 220d becoming the most searched-for replacement engine due to timing chain failures on the BMW-sourced N47D20C unit.
Common Engine Families
OM607 - Renault-sourced 1.5L (CLA 180d), entry-level economy focus
OM651 - Mercedes 2.1L (CLA 200d, CLA 220 CDI), pre-facelift workhorse with head gasket weakness
N47D20C - BMW 2.0L (CLA 220d 2015-2019), notorious rear timing chain failure
OM654 - Mercedes 2.0L (CLA 200d/220d C118), modular design with improved efficiency
Found In
C117 (2013-2019) - OM607, OM651, N47D20C
C118 (2019-2025) - OM654
Known For
Excellent motorway fuel economy (60+ mpg real-world)
N47D20C timing chain tensioner failure between 60k-100k miles
EGR cooler cracks causing coolant loss on OM651 and N47 units
High UK replacement demand on CLA 220d models
Not sure which fuel type your Mercedes Benz CLA 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 CLA specialists.
Engine Years
Mercedes Benz CLA Engines by YearWhat Was Fitted & When
This section covers all major engine changes across the Mercedes Benz CLA production timeline from 2013 to the present, organised so owners can quickly identify their engine and compare rebuilt engine prices from UK specialists.
2013-2015 - C117 Launch: M270 Petrol & OM651 Diesel Arrive
Major Engine Change
The first-generation CLA (C117) launched in 2013, introducing Mercedes' MFA platform with a range of four-cylinder petrol and diesel engines that would define the model's early replacement landscape.
Key Changes
Launch of four-door coupé body style (C117)
Petrol: M270 1.6L (CLA 180/200) and 2.0L (CLA 250)
Diesel: OM651 2.1L (CLA 200 CDI, CLA 220 CDI)
6-speed manual or 7-speed DCT transmission options
4MATIC all-wheel drive available on select variants
Known For
CLA 220 CDI with OM651 is the most reliable diesel of the early generation
M270 petrol engines suffer from timing chain stretch and HPFP failure
Early CLA 45 AMG (360hp) set records as most powerful production four-cylinder
Rear timing chain on OM651 makes replacement labour-intensive
Main Engines
M270 DE16 AL - 1.6L petrol (CLA 180, CLA 200)
M270 DE20 AL - 2.0L petrol (CLA 250, CLA 250 4MATIC)
OM651 DE22 LA - 2.1L diesel (CLA 200 CDI, CLA 220 CDI)
M133 DE20 AL - 2.0L AMG petrol (CLA 45 AMG, from late 2013)
Popular Models
Mercedes Benz CLA 180
Mercedes Benz CLA 200
Mercedes Benz CLA 250
Mercedes Benz CLA 220 CDI
Mercedes Benz CLA 45 AMG
Engine Codes Covered
M270 DE16 ALM270 DE20 ALOM651 DE22 LAM133 DE20 AL
Common Replacement Enquiries
Mercedes Benz CLA 220 CDI engine replacement
Mercedes Benz CLA 200 timing chain failure
OM651 diesel engine problems CLA
Get quotes for 2013-2015 Mercedes Benz CLA replacement engines
2013-2015 - C117 Launch: M270 Petrol & OM651 Diesel Arrive
Major Engine Change
The first-generation CLA (C117) launched in 2013, introducing Mercedes' MFA platform with a range of four-cylinder petrol and diesel engines that would define the model's early replacement landscape.
Key Changes
Launch of four-door coupé body style (C117)
Petrol: M270 1.6L (CLA 180/200) and 2.0L (CLA 250)
Diesel: OM651 2.1L (CLA 200 CDI, CLA 220 CDI)
6-speed manual or 7-speed DCT transmission options
4MATIC all-wheel drive available on select variants
Known For
CLA 220 CDI with OM651 is the most reliable diesel of the early generation
M270 petrol engines suffer from timing chain stretch and HPFP failure
Early CLA 45 AMG (360hp) set records as most powerful production four-cylinder
Rear timing chain on OM651 makes replacement labour-intensive
Main Engines
M270 DE16 AL - 1.6L petrol (CLA 180, CLA 200)
M270 DE20 AL - 2.0L petrol (CLA 250, CLA 250 4MATIC)
OM651 DE22 LA - 2.1L diesel (CLA 200 CDI, CLA 220 CDI)
M133 DE20 AL - 2.0L AMG petrol (CLA 45 AMG, from late 2013)
Engine Codes Covered
M270 DE16 ALM270 DE20 ALOM651 DE22 LAM133 DE20 AL
Popular Models
Mercedes Benz CLA 180
Mercedes Benz CLA 200
Mercedes Benz CLA 250
Mercedes Benz CLA 220 CDI
Mercedes Benz CLA 45 AMG
Common Replacement Enquiries
Mercedes Benz CLA 220 CDI engine replacement
Mercedes Benz CLA 200 timing chain failure
OM651 diesel engine problems CLA
Get quotes for 2013-2015 Mercedes Benz CLA replacement engines
Year Finder
Not sure which year your Mercedes Benz CLA was built?
Not sure which year your Mercedes Benz CLA 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 CLA specialists.
FAQ
Mercedes Benz CLA Engine ReplacementFrequently Asked Questions
Question 1
How much does a Mercedes Benz CLA engine replacement cost in the UK?
A Mercedes Benz CLA replacement engine typically costs between £1,500 for a used unit and £4,500 for a rebuilt diesel, with AMG variants reaching £11,000. Specialist fitting adds £450-£800.
Key points
- • Used CLA engines: £900-£2,200 depending on mileage and engine code
- • Rebuilt OM654/N47 diesel units: £2,000-£4,200 supply only
- • M133/M139 AMG rebuilt engines: £4,500-£11,000
- • Specialist fitting adds £450-£800; dealer labour significantly higher
- • 12-month warranty included on all rebuilt units through EngineMarket
Question 2
Is the Mercedes Benz CLA 220d engine reliable? What problems should I watch for?
The CLA 220d uses two different engines. Pre-2019 N47D20C (BMW-sourced) has well-documented timing chain tensioner failure between 60k-100k miles. Post-2019 OM654 is more reliable but has NOx sensor and cold start issues.
Key points
- • N47D20C timing chain rattling on cold start signals imminent tensioner failure
- • OM654 (2019+) owners report rough idle/shaking for 30 seconds on cold starts - Mercedes calls this "normal characteristic"
- • NOx sensor failures common on OM654, requiring cleaning or replacement every 10k-15k miles
- • EGR cooler cracks affect both engine families, causing coolant loss
- • 220d is most searched CLA diesel for replacement due to N47 timing chain reputation
Question 3
How long do Mercedes Benz CLA engines last?
Well-maintained CLA diesel engines (OM651/OM654) regularly reach 150,000-200,000 miles. Petrol M270/M260 units typically last 120,000-150,000 miles. N47D20C diesels often fail earlier due to timing chain tensioner weakness.
Key points
- • OM651 2.1L diesel (2013-2015): 180k+ miles with regular servicing
- • OM654 2.0L diesel (2019+): too new for full data but promising design
- • N47D20C (2015-2019): timing chain often fails 60k-100k miles - preventative replacement extends life
- • M270 petrol: 120k-150k miles; HPFP failure common after 80k
- • Regular oil changes every 10k miles (not Mercedes' 15k-18k interval) significantly extends life
Question 4
Which Mercedes Benz CLA engine should I avoid when buying used?
The 2015-2019 CLA 220d with the N47D20C engine carries the highest risk due to timing chain tensioner failure. Early 2013-2015 CLA 250 petrol units also show higher complaint rates for HPFP and timing issues.
Key points
- • N47D20C (CLA 220d 2015-2019) is most discussed for catastrophic chain failure
- • 2014 CLA 250 has more owner complaints than any other year, including blown engine reports
- • M270 petrol HPFP failure sends metal debris through fuel system - costly repair
- • OM607 1.5L diesel (CLA 180d) is underpowered but mechanically robust
- • Post-2019 OM654 and M282 engines show fewer major failures but have NOx sensor annoyances
Question 5
How much does timing chain replacement cost on a Mercedes Benz CLA?
Timing chain replacement on a CLA costs £1,400-£1,900 at a specialist or £2,200-£2,800 at a main dealer. This is preventative work. If the chain has already slipped, full engine replacement at £2,800-£3,800 is required.
Key points
- • Specialist preventative chain/tensioner replacement: £1,400-£1,900 including gearbox removal
- • Dealer pricing for same work: £2,200-£2,800
- • Labour-intensive because chain is at rear of engine on most CLA diesels
- • Rattling noise on cold start for 1-2 seconds is the early warning sign
- • Once timing jumps, valves contact pistons - engine is beyond repair
Question 6
Is it worth replacing the engine on a Mercedes Benz CLA?
Yes, if the car is otherwise sound. A CLA worth £4,000-£7,000 with a failed N47 diesel justifies a £2,800-£3,800 rebuilt engine. For older, high-mileage petrol models, used engine at £1,200-£2,200 is often the smarter financial choice.
Key points
- • CLA 220d with good body/interior: replacement engine is cost-effective
- • CLA 180 or 200 petrol with 120k+ miles: consider used engine over rebuilt
- • AMG CLA 45: always worth rebuilding - cars hold strong value
- • Specialist rebuilt engines fix original design weaknesses and include warranty
- • Compare against £4,000-£5,000 main dealer new engine quotes
Question 7
What are the most common Mercedes Benz CLA engine problems by year?
2013-2015 models suffer OM651 chain stretch and M270 HPFP failure. 2015-2019 CLA 220d N47D20C is worst for timing chain tensioner failure. 2019+ models have OM654 cold start misfire/shaking and NOx sensor faults, plus M260 oil consumption.
Key points
- • 2013-2015 (OM651 diesel): timing chain can stretch - listen for metallic clatter
- • 2014 (CLA 250 petrol): highest complaint volume including engine failure
- • 2015-2019 (N47D20C diesel): timing chain tensioner failure 60k-100k miles
- • 2019-2023 (OM654 diesel): cold start shaking/misfire for 30 seconds - dealer says "normal"
- • 2019-2023 (M260 petrol): piston ring wear causing oil consumption
Question 8
Can I fit a used engine to my Mercedes Benz CLA?
Yes, used CLA engines are a budget-friendly option at £900-£2,200. Ensure the donor engine has the exact same engine code (e.g., N47D20C not N47D20) and comes from the same generation C117 or C118.
Key points
- • Used engines are 50-70% cheaper than rebuilt units
- • Risk: unknown service history and hidden wear
- • Only buy from breakers offering compression test results
- • Match engine code exactly - M270 has 1.6L and 2.0L variants
- • 30-90 day warranty typical; less protection than 12 months on rebuilt
Question 9
Does a rebuilt Mercedes Benz CLA engine come with a warranty?
Every rebuilt engine supplied through EngineMarket includes a minimum 12-month unlimited mileage warranty covering parts and workmanship. Premium suppliers offer 24-36 month warranties on remanufactured units.
Key points
- • 12-month unlimited mileage is standard on all rebuilt CLA engines
- • Remanufactured engines often carry 24-36 month coverage
- • Warranty covers internal component failure, not external ancillaries
- • Supply & fit packages include labour warranty through fitting specialist
- • Always confirm exact terms - some warranties exclude timing chain (but ours don't)
Question 10
Mercedes Benz CLA petrol vs diesel - which engine is more reliable?
Diesel OM651 (2013-2015) is most robust but older. OM654 diesel has cold start quirks but no major failures. Petrol M270 suffers HPFP failure; M260 has oil consumption. Neither fuel type is clearly more reliable - condition and maintenance matter more.
Key points
- • Pre-2015 OM651 diesel: chain stretch possible but otherwise solid
- • N47D20C diesel (2015-2019): timing chain risk - avoid without proof of replacement
- • OM654 diesel (2019+): NOx sensor issues, cold start shaking - not mechanical failure
- • M270 petrol: HPFP failure contaminates entire fuel system
- • For high mileage (15k+ annual), diesel economy wins; for short journeys, petrol avoids DPF issues
Why Choose Us
Why UK Mercedes Benz CLA Owners Trust EngineMarket
Join thousands of UK drivers who compare Mercedes Benz CLA 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.
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