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Mercedes M271 Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The 1.8-litre supercharged and turbocharged petrol engine fitted to core Mercedes-Benz models from 2002 to 2014, including the C-Class, E-Class, and CLK. Reconditioned Mercedes M271 units are typically available from £2,500 , reflecting consistent specialist demand for this widely used platform.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£1,500
Reconditioned from
£2,500
Rebuilt from
£4,000
GB
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Quotes only from vetted UK engine specialists.
Key Specs
Mercedes M271 - Specifications at a Glance
Engine Code
M271 (M271.910, M271.940, M271.950, M271.960)
Fuel
Petrol
Configuration
1.8L inline-4 (supercharged Kompressor or turbocharged CGI)
Power Output(s)
122hp - 194hp (depending on specific model tune)
Years Produced
2002-2014
UK Models Fitted
4+ Mercedes models - full list in Compatibility below
Replaced
M111
Replaced By
M274
Most Common Failure
Timing chain stretch and camshaft adjuster failure
Reconditioned Price Range
£2,500-£4,500 supply-only
Vetted UK specialists for M271 replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which Mercedes Models Use the M271-
TAG: Fitted To
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 Mercedes-Benz C-Class | W203 | C180 Kompressor, C200 Kompressor | 2002-2007 | |
| Mercedes-Benz C-Class | W204 | C180 CGI, C200 CGI, C250 CGI | 2007-2014 | |
| Mercedes-Benz E-Class | W211 | E200 Kompressor, E200 CGI | 2002-2009 | |
| Mercedes-Benz E-Class | W212 | E200 CGI, E250 CGI | 2009-2013 | |
| Mercedes-Benz CLK | W209 | CLK200 Kompressor, CLK200 CGI | 2002-2009 | |
| Mercedes-Benz SLK | R171 | SLK200 Kompressor, SLK200 CGI | 2004-2010 |
02
Mercedes-Benz C-Class
03
Mercedes-Benz E-Class
04
Mercedes-Benz E-Class
05
Mercedes-Benz CLK
06
Mercedes-Benz SLK
CROSS-BRAND
M271 is documented across 6 BMW applications spanning C-Class, E-Class, CLK, SLK. Registration lookup confirms the exact suffix before quotes are sent.
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Not sure which engine your car has- Enter your registration above - we'll confirm your exact M271 fitment before any quotes are sent.
Prices
Mercedes M271 Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £1,500-£3,000 | £2,150-£3,910 | 3-6 months |
Reconditioned | £2,500-£4,500 | £3,150-£5,410 | 12-24 months |
Rebuilt | £4,000-£6,500 | £4,650-£7,410 | 12-24 months |
The final cost of a Mercedes M271 engine replacement is heavily influenced by whether the unit is a supercharged Kompressor or a turbocharged CGI (direct injection) variant. CGI models often require additional labour for intake valve carbon cleaning (walnut blasting) during the swap, while Kompressor units may need supercharger coupling inspections. See our full reconditioned engine cost guide for a detailed breakdown of what is included at each price tier.
Labour Guide
Fitting a Mercedes M271 typically takes 8-12 hours at £65/hr (independent specialist rate) - confirm exact labour when comparing quotes.
Price Factors
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Common Problems
Mercedes M271 Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the M271, based on real-world data and verified failure patterns.
Verified issue focus: Timing chain stretch and camshaft adjuster failure.
1. Timing Chain Stretch and Camshaft Adjuster Failure
1. Timing Chain Stretch and Camshaft Adjuster Failure
Typical onset:
60,000-100,000 miles
What happens:
The M271 is notorious for premature timing chain stretch and camshaft adjuster (VVT pulley) failure. This manifests as a distinct metallic rattling noise on cold starts, followed by check engine lights (often P0016/P0017) and rough running. If ignored, the chain can jump teeth, causing catastrophic valve-to-piston contact.
Repair vs replace:
If caught early, a full timing chain kit, tensioner, and camshaft adjuster replacement is viable. However, if the chain has already jumped and caused internal damage, a full Mercedes M271 engine replacement is the only reliable solution.
Read more about this issue
2. Direct Injection Carbon Buildup (CGI Variants)
2. Direct Injection Carbon Buildup (CGI Variants)
Typical onset:
50,000-90,000 miles
What happens:
On M271.950 and M271.960 CGI (stratified charged direct injection) engines, fuel is injected directly into the cylinder, bypassing the intake valves. This allows oil vapours from the PCV system and EGR gases to accumulate, forming hard carbon deposits on the intake valves and ports, leading to rough idle, misfires, and reduced power.
Repair vs replace:
Carbon buildup is addressed via walnut blasting or chemical cleaning of the intake tract, not engine replacement. However, severe neglect combined with timing chain issues can compound repair costs, making a reconditioned swap more economical than piecemeal repairs.
Read more about this issue
Compare rebuilt M271 prices with the failure already addressed
Engine Variants
M271 Sub-Codes Explained - Which One Is in Your Car-
The M271 family covers several raw sub-codes that share the same core architecture but differ in forced induction method (supercharger vs turbocharger), fuel delivery (port vs direct injection), and calibration. Identifying your exact sub-code is critical, as components like the intake manifold, ECU, and turbo/supercharger are not interchangeable. - Fitted to: Mercedes C-Class (W203 C180 Kompressor) - Key technical difference: Root-type supercharger (Kompressor) with port fuel injection. Lower stress on the bottom end compared to later turbo variants. - Sub-code-specific failure note: Shares the family timing chain pattern; supercharger snout bearing wear is an additional age-related consideration. - Interchange note: Not a straight swap with CGI variants; the ECU, wiring loom, and intake plumbing are entirely different. - Fitted to: Mercedes C-Class (W203 C200 Kompressor), CLK (W209) - Key technical difference: Higher-output supercharged variant with a larger intercooler and revised ECU mapping. - Sub-code-specific failure note: Shares the family timing chain pattern; higher boost places marginally more thermal stress on the supercharger coupling. - Interchange note: Physically similar to the .910 but requires the correct higher-flow fuel pump and specific ECU calibration to run safely. - Fitted to: Mercedes C-Class (W204 C180 CGI), Mercedes E-Class (W212 E200 CGI) - Key technical difference: Transitioned from supercharger to turbocharger and introduced direct fuel injection (CGI), improving fuel economy but introducing intake valve carbon buildup risks. - Sub-code-specific failure note: Shares the family timing chain pattern, with the added CGI-specific risk of intake port carbon accumulation. - Interchange note: Cannot be swapped with Kompressor units. The high-pressure fuel pump, turbo plumbing, and engine management system are incompatible. - Fitted to: Mercedes C-Class (W204 C200 CGI, C250 CGI), Mercedes E-Class (W212 E200 CGI, E250 CGI) - Key technical difference: Higher-output turbocharged CGI variant with a revised turbocharger and updated engine calibration for increased torque. - Sub-code-specific failure note: Shares the family timing chain and CGI carbon buildup patterns.
The M271 engine code is stamped on a machined pad on the engine block, typically near the oil filter housing or bell housing. It is also clearly listed on your vehicle's V5C registration document. Enter your registration above to confirm your exact M271 fitment before any quotes are sent.
Easily Confused
M111
- The long-running 1.8-2.3L four-cylinder the M271 replaced in 2002; the M111 had no timing chain issues at all, using a conventional belt-driven arrangement that proved far more durable over high mileages.
Alternative / Next-Gen Code
M274
- The direct successor introduced from 2012, which retained the 1.8-2.0L turbocharged layout but moved to an all-turbo configuration (dropping the supercharger) and significantly improved the timing chain and camshaft adjuster design, largely resolving the M271's most costly failure.
Related JLR Variants
M272
- The V6 petrol of the same generation, fitted to higher-spec C-Class, E-Class, and CLK models; owners of V6-powered W204 or W211 cars should look here instead, as the M272 shares none of the M271's four-cylinder components.
Confirm the exact M271 fitment
The M271 engine code is stamped on a machined pad on the engine block, typically near the oil filter housing or bell housing. It is also clearly listed on your vehicle's V5C registration document. Enter your registration above to confirm your exact M271 fitment before any quotes are sent.
Buying Guide
Buying a Replacement Mercedes M271 - What to Choose
Choosing the right replacement route depends on your budget, risk tolerance, and ownership goals. Here's a breakdown of your options.
Used:
A used Mercedes M271 is only advisable for lower-mileage host vehicles and *only* if accompanied by documented proof that the timing chain, tensioner, and camshaft adjusters have been replaced. Without this history, the risk of inheriting the same catastrophic stretch issues is unacceptably high.
Reconditioned:
This is the most recommended route for the M271. A proper reconditioned unit will include a brand-new timing chain kit, updated camshaft adjusters, and, for CGI variants, a cleaned intake tract, directly addressing the engine's known weak points out of the box.
Rebuilt:
A full rebuild is justified if your original M271 suffered a jumped timing chain that damaged the cylinder head, valves, or pistons. A specialist rebuild will machine the block, fit updated timing components, and ensure all oil galleries are clear of debris from the failed chain.
Supply & Fit Line:
Sourcing a replacement is only half the job. Our network provides full supply and fit services, ensuring the engine is installed by Mercedes-specialist technicians with a nationwide warranty backing both the labour and the unit.
Vehicle Value Note:
For older hosts like the W203 C-Class or W209 CLK, current UK market values typically sit between £1,500 and £5,000 . With a reconditioned M271 replacement costing from £2,500 (plus fitting), the repair cost can easily exceed 60% of the vehicle's current market value. In these cases, we strongly advise evaluating the car's scrap or part-exchange value before committing to a full engine replacement.
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Related Engines
Engines Related to the Mercedes M271
Explore engines that are closely related to the Mercedes-Benz M271, including its predecessor, successor, and key family variants.
Predecessor
M111
- The long-running 1.8-2.3L four-cylinder the M271 replaced in 2002; the M111 had no timing chain issues at all, using a conventional belt-driven arrangement that proved far more durable over high mileages.
Successor
M274
- The direct successor introduced from 2012, which retained the 1.8-2.0L turbocharged layout but moved to an all-turbo configuration (dropping the supercharger) and significantly improved the timing chain and camshaft adjuster design, largely resolving the M271's most costly failure.
Sibling
M272
- The V6 petrol of the same generation, fitted to higher-spec C-Class, E-Class, and CLK models; owners of V6-powered W204 or W211 cars should look here instead, as the M272 shares none of the M271's four-cylinder components.
Sibling
M273
- The V8 counterpart of the same modular family, powering S-Class and larger models; completely different architecture and failure profile from the M271.
FAQ
Mercedes M271Frequently Asked Questions
Question 1How much does a Mercedes M271 engine replacement cost in the UK-
A Mercedes M271 engine replacement typically costs between £2,500 and £4,500 for a reconditioned supply-only unit . Fitted costs generally add £650-£910 for independent specialist labour, and fully rebuilt units with upgraded timing components can reach £4,000-£6,500 supply-only. Compare M271 engine replacement quotes from vetted UK specialists.
Compare M271 quotesQuestion 2What is the most common failure with the Mercedes M271 engine-
The most documented failure pattern for the M271 is timing chain stretch and camshaft adjuster (VVT pulley) failure, typically occurring between 60,000 and 100,000 miles. Early warning signs include a metallic rattling noise on cold starts and check engine lights for camshaft correlation faults (P0016/P0017), and if the chain jumps teeth the result is catastrophic valve-to-piston contact requiring full engine replacement. Get quotes for a rebuilt M271 with the timing chain failure already addressed.
Compare M271 quotesQuestion 3Which Mercedes models use the M271 engine-
The M271 is fitted to Mercedes-Benz core models from 2002 to 2014, including the C-Class (W203 and W204), E-Class (W211 and W212), CLK (W209), and SLK (R171). It powers Kompressor badges (C180, C200) on earlier models and CGI turbo badges (C180 CGI, C200 CGI, C250 CGI) on post-2007 facelift cars, and you should always verify your exact sub-code via registration lookup. Confirm your exact M271 fitment before requesting a quote.
Compare M271 quotesQuestion 4Should I buy a used or reconditioned Mercedes M271 engine-
A reconditioned Mercedes M271 is strongly recommended over a used unit due to the well-documented timing chain stretch and camshaft adjuster failure risks. Used units carry a high probability of inheriting the same latent chain wear unless accompanied by stamped proof of a full chain kit replacement, whereas a proper reconditioned M271 includes a new timing chain, tensioner, and updated camshaft adjusters as standard. View our reconditioned Mercedes M271 engine options with 12-month warranties.
Compare M271 quotesQuestion 5What is the difference between the M271.910, M271.940, M271.950, and M271.960-
The M271.910 and M271.940 are supercharged Kompressor variants (129-192hp) with port fuel injection, fitted to pre-2007 W203 and W209 models, while the M271.950 and M271.960 are turbocharged CGI direct-injection variants (156-184hp) fitted to post-2007 W204 and W212 models. The Kompressor and CGI versions are not interchangeable due to completely different ECU, wiring loom, intake plumbing, and fuel system architectures, and the CGI variants additionally carry the risk of intake valve carbon buildup that the Kompressor versions do not. Enter your registration above to confirm your exact M271 sub-code.
Compare M271 quotesCompare Mercedes M271 Engine Prices Today
Get a free, no-obligation comparison for your exact Mercedes M271 engine code and sub-code. Our registration lookup confirms your precise fitment - whether Kompressor or CGI - before any quotes are sent, ensuring you receive accurate pricing for your specific vehicle. With reconditioned M271 units starting from an estimated £2,500, comparing specialist quotes takes just two minutes and could save you hundreds on your replacement.
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Vetted UK specialists for M271 replacements
Minimum 12-Month Warranty
Minimum 12-month warranty on reconditioned and rebuilt options
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Nationwide delivery plus supply and fit availability
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Secure enquiry - no spam. Quotes only from vetted UK engine specialists.
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