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Mercedes-Benz AMG GT Engine ReplacementCompare Prices & Save
Get quotes today from trusted UK Mercedes-Benz AMG GT engine specialists. Compare prices on reconditioned, rebuilt and used engines - supply & fit available.
AMG GT M178 V8 Engines - from £8,000 to £16,000
-> Rebuilt units from £8,000 · Common codes: M178, M178 LS1, M178 LS2, M177
AMG GT 43 Straight Six Engines - from £5,500 to £9,500
-> Rebuilt units from £5,500 · Common codes: M256, M256 E30, M256 M30
AMG GT Black Series Performance Engines - from £14,000 to £22,000
-> Rebuilt units from £14,000 · Common codes: M178 LS3, M178 Flat Plane, M178 GT R
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3 Simple Stepsto Finding the Best Mercedes Benz AMG GT 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
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Live UK Engine Market Data
What Are UK Drivers Paying for Mercedes-Benz AMG GT Engine Replacement?
The table below shows typical UK rebuilt engine costs across Mercedes-Benz AMG GT variants, covering documented failure causes, chassis generations, engine codes, and fuel types based on current market data.
Average Market Prices
- Mercedes-Benz AMG GT (C192) GT 552024-present£10,000-£17,000Oil cooler leakM177Petrol 4.0L
- Mercedes-Benz AMG GT (C192) GT 632024-present£11,000-£18,000High-pressure pump failM177 LS2Petrol 4.0L
- Mercedes-Benz AMG GT (C192) GT 63 S E Perf2024-present£14,000-£22,000Hybrid system coolantM177 E20Hybrid Petrol 4.0L
- Mercedes-Benz AMG GT (C192) GT 432024-present£5,500-£9,500M139 four-cyl oil consumpM139Petrol 2.0L
- Mercedes-Benz AMG GT (C190) GT2015-2021£9,000-£16,000Turbo boost leakM178Petrol 4.0L
- Mercedes-Benz AMG GT (C190) GT S2015-2021£9,500-£16,500Timing chain stretchM178 LS1Petrol 4.0L
- Mercedes-Benz AMG GT (C190) GT C2016-2021£10,000-£17,000Throttle valve failureM178Petrol 4.0L
- Mercedes-Benz AMG GT (C190) GT R2016-2021£12,000-£18,500Turbo bearing wearM178 LS2Petrol 4.0L
- Mercedes-Benz AMG GT (C190) GT R Pro2019-2021£13,000-£19,000Intercooler leakM178 LS2Petrol 4.0L
- Mercedes-Benz AMG GT (C190) Black Series2020-2021£16,000-£22,000Flat plane crank oilingM178 LS3Petrol 4.0L
- Mercedes-Benz AMG GT (R190) GT Roadster2017-2021£9,500-£16,500Boost pressure actuatorM178Petrol 4.0L
- Mercedes-Benz AMG GT (R190) GT C Roadster2018-2021£10,500-£17,500Timing chain wearM178Petrol 4.0L
- Mercedes-Benz AMG GT (R190) GT R Roadster2019-2021£12,500-£19,000Turbo seal failureM178 LS2Petrol 4.0L
Last updated: 22 May, 14:59
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Models We Cover
Mercedes-Benz AMG GT Engine ReplacementAll Variants Covered
From the GT to the hardcore Black Series, our network of UK Mercedes-Benz AMG GT engine specialists helps you compare rebuilt, reconditioned and used engine prices. Typical price range for a rebuilt unit with 12-month warranty is £8,000-£18,500 - supply & fit available nationwide.
Core C190/R190 V8 Range
Specs462-476hp
Years2015-2021
Rebuilt£8,000-£15,000
High-Performance & Track Focus
Roadster & Open-Top Variants
Next Generation C192 (2024+)
Variant Directory
All Mercedes-Benz AMG GT Variants - Engine Replacement Coverage
A full alphabetical listing of every Mercedes-Benz AMG GT 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
None available for this model.
Petrol Variants
GTGT 43GT 43 4MATIC+GT 53 4MATIC+GT 55GT 55 4MATIC+GT 63GT 63 4MATIC+GT 63 SGT 63 S 4MATIC+GT 63 S E PerformanceGT Black SeriesGT CGT C RoadsterGT RGT R ProGT R RoadsterGT RoadsterGT S
Performance Variants
Black SeriesGT RGT R ProGT R RoadsterGT 63 S E PerformanceGT 63 SNot sure which variant your Mercedes-Benz AMG GT is? Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.
Engine Codes
Mercedes-Benz AMG GT Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the Mercedes-Benz AMG GT 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.
Petrol Engines
Extracted from detailed petrol and performance engine families across Mercedes Benz AMG GT 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 AMG GT engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.
Common Problems
Mercedes-Benz AMG GT Engine Problems
What It Costs to Fix & When Replacement Makes Sense
The M178 V8 is a masterpiece of performance engineering, but even hand-built AMG units have known weak points. Timing chain stretch and turbo failures dominate replacement demand across C190 and R190 GT models. Every rebuilt engine supplied through EngineMarket includes upgraded components designed to address the original failure point - plus a minimum 12-month unlimited mileage warranty. Below we break down the four most common AMG GT engine problems, what genuine repair costs look like, and when replacement is the smarter financial decision.
Every rebuilt engine includes a minimum 12-month unlimited mileage warranty.
1. Mercedes-Benz AMG GT Timing Chain Stretch
Why M178 V8 Engines Fail Prematurely
Affected Models
Mercedes-Benz AMG GT, GT S, GT C, GT R, GT Roadster (2015-2021, M178, M178 LS1, M178 LS2)
Typical Failure Mileage
50,000 - 80,000 miles
Root Cause
The single-row timing chain fitted to early M178 engines elongates under high thermal load, particularly on cars with frequent track use or aggressive downshifting. Chain slack allows the camshaft sprockets to jump timing, leading to valve-to-piston contact.
Repair Options & Estimated Costs (UK ranges)
| Repair Tier | Dealer Price | Specialist Price | What It Involves | Longevity / Suitability |
|---|---|---|---|---|
Minor - Preventative Chain Replacement Minor | £3,800 - £5,500 | £2,400 - £3,200 | Replace timing chain, tensioner, guides, cam sprockets | Viable only before chain slip occurs. No warning signs = act early. |
Major - Cylinder Head Rebuild Minor | £6,500 - £9,000 | £4,500 - £6,500 | Remove head, replace bent valves, lap seats, new gaskets | For engines with minor valve contact. Adds 40-60k miles typically. |
Full Replacement - Rebuilt M178 Best Value | £14,000 - £18,000 | £9,000 - £15,000 | Supply & fit fully rebuilt engine with upgraded chain and guides | Complete solution with 12-month warranty. Includes uprated double-row chain. |
Our Recommendation
Best next step for mercedes-benz amg gt timing chain stretch
On an AMG GT worth £35,000-£80,000, preventative chain replacement is significantly cheaper than waiting for failure. The moment you hear a metallic rattle on cold start from the rear of the engine, act immediately. If the chain has already slipped, replacement costs approach rebuild territory - at which point a fully rebuilt engine with upgraded internals makes better financial sense than repairing damaged heads.
Don't Let Engine Failure Write Off Your Mercedes-Benz AMG GT
These four failure points - timing chain stretch, turbo actuator failure, crossover pipe coolant leaks, and valve stem seal degradation - account for over 80% of M178 engine replacements in the UK. The good news is that every failure has a predictable pattern and a cost-effective solution when caught early. EngineMarket connects you with trusted UK AMG GT specialists who supply rebuilt engines fitted with upgraded timing chains, reinforced turbo components, aluminium crossover pipes, and Viton valve stem seals - all addressing the original weak points. Every unit comes with a minimum 12-month unlimited mileage warranty and nationwide delivery or fitting options. Compare prices today and get your AMG GT back on the road without the main dealer premium.
Compare Mercedes-Benz AMG GT Engine Replacement Prices Now →Mercedes-Benz AMG GT Engine Problems
What It Costs to Fix & When Replacement Makes Sense
The M178 V8 is a masterpiece of performance engineering, but even hand-built AMG units have known weak points. Timing chain stretch and turbo failures dominate replacement demand across C190 and R190 GT models. Every rebuilt engine supplied through EngineMarket includes upgraded components designed to address the original failure point - plus a minimum 12-month unlimited mileage warranty. Below we break down the four most common AMG GT engine problems, what genuine repair costs look like, and when replacement is the smarter financial decision.
Affected Models
Mercedes-Benz AMG GT, GT S, GT C, GT R, GT Roadster (2015-2021, M178, M178 LS1, M178 LS2)
Typical Failure Mileage
50,000 - 80,000 miles
Root Cause
The single-row timing chain fitted to early M178 engines elongates under high thermal load, particularly on cars with frequent track use or aggressive downshifting. Chain slack allows the camshaft sprockets to jump timing, leading to valve-to-piston contact.
Minor - Preventative Chain Replacement
Dealer
£3,800 - £5,500
Specialist
£2,400 - £3,200
Replace timing chain, tensioner, guides, cam sprockets
Viable only before chain slip occurs. No warning signs = act early.
Major - Cylinder Head Rebuild
Dealer
£6,500 - £9,000
Specialist
£4,500 - £6,500
Remove head, replace bent valves, lap seats, new gaskets
For engines with minor valve contact. Adds 40-60k miles typically.
Full Replacement - Rebuilt M178
Dealer
£14,000 - £18,000
Specialist
£9,000 - £15,000
Supply & fit fully rebuilt engine with upgraded chain and guides
Complete solution with 12-month warranty. Includes uprated double-row chain.
Our Recommendation
Best next step for mercedes-benz amg gt timing chain stretch
On an AMG GT worth £35,000-£80,000, preventative chain replacement is significantly cheaper than waiting for failure. The moment you hear a metallic rattle on cold start from the rear of the engine, act immediately. If the chain has already slipped, replacement costs approach rebuild territory - at which point a fully rebuilt engine with upgraded internals makes better financial sense than repairing damaged heads.
Don't Let Engine Failure Write Off Your Mercedes-Benz AMG GT
These four failure points - timing chain stretch, turbo actuator failure, crossover pipe coolant leaks, and valve stem seal degradation - account for over 80% of M178 engine replacements in the UK. The good news is that every failure has a predictable pattern and a cost-effective solution when caught early. EngineMarket connects you with trusted UK AMG GT specialists who supply rebuilt engines fitted with upgraded timing chains, reinforced turbo components, aluminium crossover pipes, and Viton valve stem seals - all addressing the original weak points. Every unit comes with a minimum 12-month unlimited mileage warranty and nationwide delivery or fitting options. Compare prices today and get your AMG GT back on the road without the main dealer premium.
Compare Mercedes-Benz AMG GT 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 AMG GT 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 AMG GT Engine TypesOptions, Costs & What to Expect
Every engine type is available through our UK network with typical price ranges based on your AMG GT variant, M178 or M177 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 AMG GT within hours.
Engine Sizes
Mercedes-Benz AMG GT Engines by SizeFind the Right Displacement for Your Variant
Every displacement ever fitted to the AMG GT across all generations is listed below, with compatible engine codes, production years, power outputs and common failure notes.
Mercedes-Benz AMG GT Petrol Engine Sizes
The M139 four-cylinder engine arrived with the second-generation C192 GT 43 in 2024, marking a controversial departure from the GT's V8 heritage. Despite AMG's claim that it is the "world's most powerful four-cylinder," producing over 400hp from 2.0 litres, enthusiast demand has remained firmly with the V8 options.
| Engine Code(s) | M139, M139 (MHEV) |
| Compatible Models (UK) | GT 43 (C192, 2024-present), GT 43 4MATIC+ |
| Production Years | C192, 2024-present |
Common Failure Points
Watch for these known weak points
High-pressure fuel pump seizure (70k+ miles), turbo bearing wear under sustained boost, ISG overheating
Not sure which engine size your Mercedes-Benz AMG GT 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 AMG GT specialists.
Mercedes-Benz AMG GT Engines Fuel Type
Mercedes-Benz AMG GT Engines by Fuel Type
Choose your Mercedes-Benz AMG GT engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from the entry-level GT to the fire-breathing Black Series.
Mercedes-Benz AMG GT Petrol Engines
Mercedes-Benz AMG GT Petrol Engines
The AMG GT is defined by its hand-built V8 petrol engines, though the second-generation C192 introduced a four-cylinder option and a straight-six mild hybrid.
Common Engine Families
M178 - The original AMG GT V8, dry-sump, hot-vee, cross-plane crank (GT, GT S, GT C)
M178 LS2 - Track-focused unit for GT R and GT R Pro with upgraded oiling and turbos
M178 LS3 - Flat-plane crank V8 exclusive to the 730hp Black Series
M177 - Wet-sump V8 for second-generation C192 GT 55 and GT 63 models
M256 - 3.0L straight-six mild hybrid for GT 53 4MATIC+ (X290 and C192)
M139 - 2.0L four-cylinder turbo for GT 43 (C192, 2024-present)
Found In
C190/R190 Coupe & Roadster (2015-2021) - M178, M178 LS1, M178 LS2, M178 LS3
X290 4-Door Coupe (2018-present) - M256 (GT 53), M177 (GT 63/63 S)
C192 Second Generation (2024-present) - M139 (GT 43), M256 (GT 53), M177 (GT 55/63/63 S)
Known For
Hand-built "One Man, One Engine" assembly with builder's signature on each unit
M178 timing chain stretch as the #1 replacement driver (50k-80k miles)
Hot-vee turbo actuator failures and coolant crossover pipe leaks
Black Series flat-plane crank delivers 730hp - the most powerful AMG V8 ever
Not sure which fuel type your Mercedes-Benz AMG GT 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 AMG GT specialists.
Engine Years
Mercedes-Benz AMG GT Engines by YearWhat Was Fitted & When
From the 2015 launch of the C190 coupe to the 2024 second-generation C192, this timeline covers every AMG GT engine change by year - helping you identify your exact unit and compare rebuilt prices from UK specialists.
2014-2015 - C190 Launch: Original M178 Debut
Major Engine Change
The AMG GT arrives as the spiritual successor to the SLS, powered by AMG's first dedicated dry-sump V8 - the M178.
Key Changes
C190 coupe launched at Paris Motor Show (October 2014)
GT (462hp) and GT S (510hp) variants available from launch
Dry-sump oiling system introduced for track-focused durability
First AMG engine with "hot-vee" turbo layout
Known For
Hand-built "One Man, One Engine" assembly signature on every unit
Early M178 units prone to timing chain stretch from 50,000 miles
Dry-sump system requires specialist knowledge for correct oil filling
M157 phased out within 12 months - rare and collectable
Main Engines
M178 - 4.0L petrol (GT, 462hp)
M178 LS1 - 4.0L petrol (GT S, 510hp)
M157 - 5.5L petrol (very early GT / GT S units, 550-585hp)
Popular Models
Mercedes-Benz AMG GT
Mercedes-Benz AMG GT S
Engine Codes Covered
M178M178 LS1M157
Common Replacement Enquiries
M178 timing chain stretch
AMG GT engine replacement cost 2015
M157 AMG GT engine for sale
Get quotes for 2014-2015 Mercedes-Benz AMG GT replacement engines
2014-2015 - C190 Launch: Original M178 Debut
Major Engine Change
The AMG GT arrives as the spiritual successor to the SLS, powered by AMG's first dedicated dry-sump V8 - the M178.
Key Changes
C190 coupe launched at Paris Motor Show (October 2014)
GT (462hp) and GT S (510hp) variants available from launch
Dry-sump oiling system introduced for track-focused durability
First AMG engine with "hot-vee" turbo layout
Known For
Hand-built "One Man, One Engine" assembly signature on every unit
Early M178 units prone to timing chain stretch from 50,000 miles
Dry-sump system requires specialist knowledge for correct oil filling
M157 phased out within 12 months - rare and collectable
Main Engines
M178 - 4.0L petrol (GT, 462hp)
M178 LS1 - 4.0L petrol (GT S, 510hp)
M157 - 5.5L petrol (very early GT / GT S units, 550-585hp)
Engine Codes Covered
M178M178 LS1M157
Popular Models
Mercedes-Benz AMG GT
Mercedes-Benz AMG GT S
Common Replacement Enquiries
M178 timing chain stretch
AMG GT engine replacement cost 2015
M157 AMG GT engine for sale
Get quotes for 2014-2015 Mercedes-Benz AMG GT replacement engines
Year Finder
Not sure which year your Mercedes Benz AMG GT was built?
Not sure which year your Mercedes-Benz AMG GT 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 AMG GT specialists.
FAQ
Mercedes-Benz AMG GT Engine ReplacementFrequently Asked Questions
Question 1
How much does a Mercedes-Benz AMG GT engine replacement cost in the UK?
A rebuilt M178 V8 costs £8,000-£16,000 supply-only, rising to £14,000-£22,000 for a Black Series flat-plane crank unit. Prices vary by variant, engine code and whether you need supply & fit.
Key points
- • Base M178 (GT/GT S): £8,000-£15,000 for a rebuilt unit
- • Performance M178 LS2 (GT R): £11,000-£19,000 supply-only
- • Black Series M178 LS3: £15,000-£22,000 - limited availability
- • Supply & fit adds £800-£1,500 to any engine price
Question 2
What are the most common Mercedes-Benz AMG GT engine problems?
Timing chain stretch (50k-80k miles) is the #1 failure on M178 engines, followed by turbo actuator failure and hot-vee coolant crossover pipe leaks. Valve stem seal hardening also causes oil consumption.
Key points
- • Timing chain stretch leads to valve contact - replace chains preventatively
- • Turbo actuator electronics fail from heat exposure in the hot-vee
- • Plastic coolant pipes crack between cylinder banks - upgrade to aluminium
- • Viton valve stem seals solve oil consumption on early M178 LS1 units
Question 3
Is it worth rebuilding an AMG GT engine or should I replace it?
On a GT worth £35k-£80k, preventative chain replacement is cost-effective. If the engine has already failed, a fully rebuilt unit with upgraded timing components and seals is usually better value than repairing the damaged original.
Key points
- • Preventative chain replacement at a specialist: £2,400-£3,200
- • Repairing a slipped chain with head work: £4,500-£6,500
- • Fully rebuilt M178 with upgrades and warranty: £9,000-£16,000
- • Matching numbers matter for collectable Black Series and GT R Pro
Question 4
How long does a Mercedes-Benz AMG GT M178 engine last?
Well-maintained M178 engines regularly reach 100k-120k miles. The key is addressing timing chain stretch before it fails - typically around 50k-80k miles. Cars used on track wear chains faster.
Key points
- • Timing chain service interval effectively 50k-80k miles on early cars
- • Turbo actuator life: 40k-70k miles depending on heat exposure
- • Valve stem seals typically last 45k-75k miles before hardening
- • Late C190 units (2019+) have revised chain guides for longer life
Question 5
What engine is in my AMG GT? How do I identify the engine code?
Check your VIN - digits 4-8 contain the engine code. GT and GT S use M178/M178 LS1, GT R uses M178 LS2, Black Series uses M178 LS3. C192 models (2024+) use M177 (V8) or M139 (four-cylinder).
Key points
- • M178: Base GT (462-476hp) and GT C (550-557hp)
- • M178 LS1: GT S (510-522hp) and early GT variants
- • M178 LS2: GT R, GT R Pro (577-585hp)
- • M178 LS3: Black Series only (720-730hp flat-plane crank)
Question 6
Can I fit an AMG GT R engine into my standard AMG GT?
Yes, the M178 LS2 from a GT R is a direct physical swap into any C190 coupe. However, you'll need the LS2-specific ECU calibration, turbo oiling upgrades, and potentially the GT R's auxiliary oil cooler.
Key points
- • Physical mounting points are identical across all M178 engines
- • ECU must be reprogrammed with LS2 maps - not a plug-and-play swap
- • GT R uses uprated turbo bearings and revised oiling passages
- • Specialist fitting recommended - budget £11,000-£19,000 for the complete job
Question 7
What warranty comes with a replacement AMG GT engine from EngineMarket?
Every engine supplied through EngineMarket carries a minimum 12-month unlimited mileage warranty. Many reconditioned and remanufactured units from specialist AMG rebuilders include 24-month coverage.
Key points
- • Standard warranty: 12 months unlimited mileage on all engine types
- • Reconditioned/remanufactured units: Often 24 months from AMG specialists
- • Supply & fit packages: Labour warranty included with fitting (12 months)
- • Black Series LS3 engines: Limited supply, always confirm warranty terms
Question 8
How long does AMG GT engine replacement take from a UK specialist?
Supply-only delivery takes 2-5 working days. Full supply and fit by an AMG specialist typically takes 3-5 days, including removal, installation, fluids, and first-start diagnostics.
Key points
- • Used engine delivery: 2-3 days from UK breaker network
- • Rebuilt/reconditioned engine delivery: 5-10 days (built to order)
- • Supply & fit turnaround: 3-5 days at a fixed workshop
- • Mobile fitting: Available nationwide, add 1-2 days for travel scheduling
Question 9
Do you supply upgraded AMG GT engines with reinforced parts?
Yes, specialist rebuilders offer upgraded M178 units with double-row timing chains, aluminium coolant crossover pipes, Viton valve stem seals, and reinforced turbo actuators - all addressing the original failure points.
Key points
- • Upgraded timing chain kit: Eliminates stretch risk completely
- • Aluminium crossover pipe: Permanent fix for hot-vee coolant leaks
- • Viton valve stem seals: Solve oil consumption on LS1 engines
- • Upgraded turbo actuators: Heat-resistant electronics for longer life
Question 10
Do you buy broken or damaged AMG GT engines for core exchange?
Yes, many of our specialist suppliers offer core credit for your failed M178, M177 or M139 engine. The credit typically ranges from £1,000-£3,000 depending on the engine code and whether the block is salvageable.
Key points
- • M178 core credit: £1,500-£3,000 for rebuildable units
- • M139 (four-cylinder) credit: £800-£1,500 - lower demand
- • Black Series LS3 cores: Valued higher - contact us for a quote
- • Engine must be complete (no missing turbos or ancillaries)
Why Choose Us
Why UK Mercedes-Benz AMG GT Owners Trust EngineMarket
Join thousands of UK drivers who compare Mercedes-Benz AMG GT 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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