How much does a Mercedes X117 engine replacement cost in the UK?

A reconditioned X117 engine typically costs £1,600–£6,500 supply only, depending on the engine — the OM651 diesel sits at £2,800–£4,800, while the M270 petrol is £1,800–£4,200 and the AMG M133 is £3,500–£6,500. Fitting adds £650–£1,500 depending on the variant. Use our calculator for a personalised quote.

Which X117 engine is the most reliable?

The OM651 2.1-litre diesel (CLA 200 d/CLA 220 d) is the most reliable choice — it's Mercedes-developed, refined, and has a strong track record when serviced properly. The M270 2.0-litre petrol is also very dependable. Avoid the Renault-sourced OM607 1.5-litre diesel.

What are the common problems with the X117?

The OM651 diesel can suffer from injector seal leaks (known as 'Black Death'); the M270 petrol engine can develop water pump and coolant leaks; and the M133 AMG engine can experience turbocharger wear if not maintained correctly. Regular servicing is key.

Is the Mercedes X117 reliable overall?

Yes — the X117 is generally well-regarded for reliability, especially with the OM651 diesel and M270 petrol engines. The Renault-sourced OM607 is less refined and has more reported issues. The AMG M133 is reliable when properly maintained but demands meticulous servicing.

Which X117 engine should I avoid?

The OM607 1.5-litre diesel (CLA 180 d) — it's a Renault unit that suffers from injector and DPF problems and lacks the refinement of the Mercedes-developed OM651. The M133 AMG is not an engine to avoid, but buyers should be aware of the higher running costs.

How do I know if my X117 engine needs replacing?

Warning signs include a ticking noise from the engine bay (OM651 injector seals), coolant loss (M270 water pump), or turbo whine/whistle (M133 AMG). If you notice any of these, have the car inspected immediately — ignoring them can lead to a full engine failure.

Is it worth replacing a Mercedes X117 engine, or should I scrap the car?

Depends on the car's value. A well-kept X117 is worth £6,000–£18,000, so a £2,800–£4,800 OM651 recon is 16–80% of its value. On a sub-£6,000 X117, the recon may approach or exceed our 70% Mercedes threshold — we'd advise walking away. Against a well-kept £10,000+ example, the same recon drops to 28–48% — a repair decision, not a financial one.

How long do Mercedes X117 engines last?

The OM651 diesel can easily exceed 150,000 miles with regular servicing and early attention to the injector seals. The M270 petrol is similarly durable. The M133 AMG can also reach high mileages but requires more frequent servicing and careful maintenance.

What is the difference between the X117 and the C117?

The X117 is the Shooting Brake (estate) version of the first-generation CLA, while the C117 is the 4-door Coupé/Saloon. Both share the same MFA platform and most engines, but the X117 offers a more practical boot (495–1,354 litres) and slightly different rear bodywork. Costs vary slightly by body style due to labour access — see each generation's own page for specifics.

How do I find my Mercedes X117 engine code?

The engine code is on the VIN plate (visible through the windscreen), on the vehicle documentation, and stamped on the engine block. For the X117, common codes are M270 (petrol), M133 (AMG petrol), OM651 (diesel, 2.1L), and OM607 (diesel, 1.5L). Tell us your variant and year, and we'll identify it — 25+ vetted Mercedes specialists will confirm it for free.

Mercedes CLA X117Shooting Brake2015–2019

Mercedes CLA X117 Engines — The Complete UK Guide

Name: Mercedes CLA X117 UK Engine Enquiry Data 2025
Creator: MercedesEngines.uk

Every engine fitted to the CLA Shooting Brake — from the efficient 1.5-litre diesel to the 381bhp AMG M133 turbo. Real UK costs, honest reliability data, and the MFA platform that made this compact estate a genuine enthusiast favourite. Backed by 1,250+ real UK enquiries in 2025 [MB‑VERIFIED].

Explore X117 Engines

1,250+X117 Enquiries (2025)MB‑VERIFIED

Shooting Brake

8+Engine Codes

Part of EngineFinders

Explore X117 Engines

Mercedes CLA X117 Engine Codes — The Complete Database

Every engine fitted to the CLA Shooting Brake specifically — including the M270 petrol family, the AMG M133, and the OM651 diesel range.

Engine CodeFamilyFuelDisplacementPowerYears (X117)Variants (badges)Reliability2025 EnquiriesAvg. Recon Cost

M270.910M270Petrol, turbo1.6L (1595cc)122–156 bhp2015–2019CLA 180, CLA 200★★★★☆ [PROVISIONAL — well-regarded MFA petrol]— (pattern data)£1,800–£3,500 [MB-QUOTE]

M270.920M270Petrol, turbo2.0L (1991cc)184–218 bhp2015–2019CLA 220, CLA 250, CLA 250 4MATIC★★★★☆ [PROVISIONAL — torquey 2.0-litre, reliable]— (pattern data)£2,000–£4,200 [MB-QUOTE]

M133.980M133Petrol, turbo2.0L (1991cc)360–381 bhp2015–2019CLA 45 AMG 4MATIC★★★★☆ [PROVISIONAL — AMG-tuned M133; powerful but demanding]370 [MB-VERIFIED]£3,500–£6,500 [MB-QUOTE]

OM607.951OM607Diesel, turbo1.5L (1461cc)109 bhp2015–2019CLA 180 d★★★☆☆ [PROVISIONAL — Renault-sourced; economical but less refined]— (pattern data)£1,600–£3,000 [MB-QUOTE]

OM651.930OM651Diesel, turbo2.1L (2143cc)136–177 bhp2015–2019CLA 200 CDI, CLA 200 d, CLA 220 d★★★★☆ [PROVISIONAL — Mercedes-developed; reliable but watch injector seals]1,250 [MB-VERIFIED]£2,800–£4,800 [MB-QUOTE]

Engine CodeFuelPowerYearsReliabilityEnquiriesAvg. Recon Cost

M270.910M270Petrol, turbo122–156 bhp2015–2019★★★★☆ [PROVISIONAL — well-regarded MFA petrol]— (pattern data)£1,800–£3,500 [MB-QUOTE]

M270.920M270Petrol, turbo184–218 bhp2015–2019★★★★☆ [PROVISIONAL — torquey 2.0-litre, reliable]— (pattern data)£2,000–£4,200 [MB-QUOTE]

M133.980M133Petrol, turbo360–381 bhp2015–2019★★★★☆ [PROVISIONAL — AMG-tuned M133; powerful but demanding]370 [MB-VERIFIED]£3,500–£6,500 [MB-QUOTE]

OM607.951OM607Diesel, turbo109 bhp2015–2019★★★☆☆ [PROVISIONAL — Renault-sourced; economical but less refined]— (pattern data)£1,600–£3,000 [MB-QUOTE]

OM651.930OM651Diesel, turbo136–177 bhp2015–2019★★★★☆ [PROVISIONAL — Mercedes-developed; reliable but watch injector seals]1,250 [MB-VERIFIED]£2,800–£4,800 [MB-QUOTE]

Overview

Mercedes CLA X117 — Overview

The X117 is the Shooting Brake (estate) version of the first-generation Mercedes‑Benz CLA, announced at the 2014 LA Auto Show and launched in 2015.

Built on the Mercedes MFA platform shared with the W176 A‑Class and W246 B‑Class, it offered the same 2,699mm wheelbase as the C117 saloon but with a more practical 495–1,354 litre boot. The engine range spanned from the 1.5-litre OM607 diesel to the fire-breathing M133 in the CLA 45 AMG, with a facelift arriving in 2016.

Key Facts

Platform

Mercedes MFA (shared with W176 A‑Class, W246 B‑Class, C117 CLA, X156 GLA)

Predecessor

none (new model line)

Successor

X118 (2019–present)

Sibling body styles in this generation

C117 (CLA Coupé/Saloon)

Market Intelligence

The X117 CLA Shooting Brake generated 1,250+ real UK engine enquiries in 2025 [MB‑VERIFIED], concentrated on the OM651 diesel as the most‑requested powertrain.

Mercedes CLA X117 — Overview

The X117 is the Shooting Brake (estate) version of the first-generation Mercedes‑Benz CLA, announced at the 2014 LA Auto Show and launched in 2015.

Key Facts

Platform

Mercedes MFA (shared with W176 A‑Class, W246 B‑Class, C117 CLA, X156 GLA)

Predecessor

none (new model line)

Successor

X118 (2019–present)

Sibling body styles in this generation

C117 (CLA Coupé/Saloon)

Market Intelligence

The X117 CLA Shooting Brake generated 1,250+ real UK engine enquiries in 2025 [MB‑VERIFIED], concentrated on the OM651 diesel as the most‑requested powertrain.

Best & Worst Engines

Best Diesel Overall

OM651.930 (CLA 200 d/220 d)

“Mercedes' own 2.1‑litre diesel, introduced in 2008, is the pick of the X117 diesel range — smooth, torquey, and backed by a strong reliability record when serviced properly.”

Who it's for: buyers who want a modern, efficient diesel without the Renault‑sourced compromises.

Best Petrol Overall

M270.920 (CLA 250)

“Mercedes' 2.0‑litre turbo petrol, delivering 211–218 bhp with a responsive character and strong torque. It's the enthusiast's choice in the X117 range.”

Who it's for: buyers who want genuine performance from a compact estate.

Highest Risk

OM607.951 (CLA 180 d)

“The Renault‑sourced 1.5‑litre diesel is economical but lacks the refinement and long‑term durability of Mercedes' own OM651. It's the entry‑level option for a reason.”

Who it's for: buyers on a tight budget who prioritise low running costs over longevity.

Most Expensive Failure

M133.980 (CLA 45 AMG) — turbo and cooling system

“The high‑output AMG engine demands meticulous maintenance; turbocharger and cooling system issues can be costly if neglected.”

Who it's for: buyers who want AMG performance and can afford the premium running costs.

Best Value

M270.910 (CLA 200)

“The 1.6‑litre turbo petrol offers the best balance of performance (156 bhp), economy, and reliability. It's the sweet spot in the X117 petrol range.”

Who it's for: buyers who want a petrol without the AMG running costs.

Most Overlooked

M270.920 (CLA 220 4MATIC)

“The 184 bhp 2.0‑litre with all‑wheel drive offers genuine year‑round capability. It's often overlooked in favour of the CLA 250 but offers a better real‑world balance.”

Who it's for: buyers who need all‑weather traction without the top‑spec premium.

Best Diesel Overall

OM651.930 (CLA 200 d/220 d)

“Mercedes' own 2.1‑litre diesel, introduced in 2008, is the pick of the X117 diesel range — smooth, torquey, and backed by a strong reliability record when serviced properly.”

Who it's for: buyers who want a modern, efficient diesel without the Renault‑sourced compromises.

Best Petrol Overall

M270.920 (CLA 250)

“Mercedes' 2.0‑litre turbo petrol, delivering 211–218 bhp with a responsive character and strong torque. It's the enthusiast's choice in the X117 range.”

Who it's for: buyers who want genuine performance from a compact estate.

Highest Risk

OM607.951 (CLA 180 d)

“The Renault‑sourced 1.5‑litre diesel is economical but lacks the refinement and long‑term durability of Mercedes' own OM651. It's the entry‑level option for a reason.”

Who it's for: buyers on a tight budget who prioritise low running costs over longevity.

Most Expensive Failure

M133.980 (CLA 45 AMG) — turbo and cooling system

“The high‑output AMG engine demands meticulous maintenance; turbocharger and cooling system issues can be costly if neglected.”

Who it's for: buyers who want AMG performance and can afford the premium running costs.

Best Value

M270.910 (CLA 200)

“The 1.6‑litre turbo petrol offers the best balance of performance (156 bhp), economy, and reliability. It's the sweet spot in the X117 petrol range.”

Who it's for: buyers who want a petrol without the AMG running costs.

Most Overlooked

M270.920 (CLA 220 4MATIC)

“The 184 bhp 2.0‑litre with all‑wheel drive offers genuine year‑round capability. It's often overlooked in favour of the CLA 250 but offers a better real‑world balance.”

Who it's for: buyers who need all‑weather traction without the top‑spec premium.

Mercedes CLA X117 — Ownership Economics

EngineTypical MileageCommon Major FailureRepair Cost (Specialist)Replacement Cost (Recon)Ownership Verdict

M270.910 (CLA 180/200)40k–80kTiming chain wear, carbon buildup£500–£1,200£1,800–£3,500

Good Value — cheap to run, reliable.

M270.920 (CLA 220/250)50k–90kWater pump, coolant leaks£400–£1,000£2,000–£4,200

Best Petrol — powerful and reliable.

M133.980 (CLA 45 AMG)30k–60kTurbo wear, cooling system£800–£2,500£3,500–£6,500

AMG Tax — high performance, high running costs.

OM607.951 (CLA 180 d)60k–100kInjector failure, DPF clogging£500–£1,200£1,600–£3,000

Budget Diesel — economical but Renault‑sourced.

OM651.930 (CLA 200 d/220 d)80k–150kInjector seal leaks (Black Death)£400–£1,200£2,800–£4,800

Best Diesel — efficient, durable, Mercedes‑developed.

EngineTypical MileageCommon Major FailureRepair Cost (Specialist)Replacement Cost (Recon)Ownership Verdict

M270.910 (CLA 180/200)40k–80kTiming chain wear, carbon buildup£500–£1,200£1,800–£3,500

Good Value — cheap to run, reliable.

M270.920 (CLA 220/250)50k–90kWater pump, coolant leaks£400–£1,000£2,000–£4,200

Best Petrol — powerful and reliable.

M133.980 (CLA 45 AMG)30k–60kTurbo wear, cooling system£800–£2,500£3,500–£6,500

AMG Tax — high performance, high running costs.

OM607.951 (CLA 180 d)60k–100kInjector failure, DPF clogging£500–£1,200£1,600–£3,000

Budget Diesel — economical but Renault‑sourced.

OM651.930 (CLA 200 d/220 d)80k–150kInjector seal leaks (Black Death)£400–£1,200£2,800–£4,800

Best Diesel — efficient, durable, Mercedes‑developed.

The X117 rule

A £2,800–£4,800 OM651 recon against a £6,000–£18,000 X117 sits at 16–80% of the car's value. On a sub‑£6,000 X117, that brushes our 70% Mercedes threshold — we'll honestly tell you to walk away. Against a well‑kept £10,000+ example, the same recon drops to a routine 28–48% — a repair decision, not a financial one. Value the car first.

Key Takeaways

Which X117 Costs Least To Own?
CLA 200 d (OM651) — best balance of economy and reliability.
Which X117 Costs Most To Own?
CLA 45 AMG (M133) — high‑performance running costs add up.
Which X117 Is Best Value?
CLA 200 (M270.910) — the sweet spot in the petrol range.

Common Problems

OM651

Injector Seal Leaks (Black Death)

Affected models:

CLA 200 d, CLA 220 d (OM651)

Typical failure mileage:

60,000–120,000 miles

Root cause:

The injector seals on the OM651 can fail, allowing combustion gases to escape past the injector. This creates a carbon buildup that sounds like a ticking noise and can eventually damage the cylinder head.

Tiered Cost Table

Our Recommendation

If you hear a ticking noise from the engine bay, have the injector seals checked immediately — a £400–£1,000 repair is far cheaper than the £2,800–£4,800 replacement that follows if the head is damaged.

Compare OM651 engine prices for your X117 diesel

M270

Water Pump & Coolant Leaks

Affected models:

CLA 200, CLA 220, CLA 250 (M270)

Typical failure mileage:

50,000–90,000 miles

Root cause:

The M270's water pump and plastic coolant fittings can degrade over time, leading to coolant loss and potential overheating.

Tiered Cost Table

Our Recommendation

Replace the water pump proactively at 60,000 miles — a £400–£800 repair is cheap insurance against a £1,800–£3,500 engine replacement.

Compare M270 engine prices for your X117 petrol

M133

Turbocharger Wear (AMG)

Affected models:

CLA 45 AMG (M133)

Typical failure mileage:

30,000–60,000 miles

Root cause:

The high‑output M133 turbocharger can suffer from bearing wear and oil starvation, particularly if service intervals are stretched or the car is tracked regularly.

Tiered Cost Table

Our Recommendation

On AMG models, stick to strict service intervals (every 6,000–8,000 miles) and use the correct high‑grade oil — an £800–£1,800 turbo rebuild is far cheaper than the £3,500–£6,500 replacement that follows a catastrophic failure.

Compare M133 engine prices for your CLA 45 AMG

X117 Engine Replacement Costs — By Engine and Condition

VariantEngine CodeUsed (Supply)Reconditioned (Supply)Rebuilt (Supply)Labour Hours

CLA 180 / CLA 200M270.910£800–£1,800£1,800–£3,500£2,800–£4,5008–12 hrs

CLA 220 / CLA 250M270.920£1,000–£2,200£2,000–£4,200£3,200–£5,50010–14 hrs

CLA 45 AMGM133.980£2,000–£3,800£3,500–£6,500£5,000–£8,50012–16 hrs

CLA 180 dOM607.951£700–£1,500£1,600–£3,000£2,500–£4,2008–12 hrs

CLA 200 d / CLA 220 dOM651.930£1,500–£2,800£2,800–£4,800£4,000–£6,50010–14 hrs

No Generation variance from the Model Page's baseline figures — the X117 shares its MFA platform with the A‑Class (W176) and B‑Class (W246), so engine‑bay access and labour times are consistent across the range. Costs are inherited directly per the Authority Model, with no divergence note required.

Core Variants

Diesel Variants

CLA 180 dCLA 200 dCLA 220 d

Petrol Variants

CLA 180CLA 200CLA 220 4MATICCLA 250CLA 250 4MATICCLA 45 AMG 4MATIC

Scope note: All variants listed are X117 Shooting Brake only. The C117 Coupé/Saloon shares most of these engines but is covered on its own Generation Page, since fitment and labour access vary slightly by body style.

Core Variants

Diesel Variants

CLA 180 dCLA 200 dCLA 220 d

Petrol Variants

CLA 180CLA 200CLA 220 4MATICCLA 250CLA 250 4MATICCLA 45 AMG 4MATIC

Market Intelligence

Most Requested E90 Engines (2025)

1.1. OM651 (2.1 diesel) — most‑requested across the Mercedes range [MB‑VERIFIED]
2.2. M270 (2.0 petrol) — strong demand for performance variants
3.3. M133 (AMG) — enthusiast demand for the CLA 45

Most Requested E90 Variants

1.1. CLA 220 d
2.2. CLA 250
3.3. CLA 45 AMG

Average E90 Replacement Cost

£1,600–£6,500 supply only [MB‑QUOTE]

Most Common E90 Failures

1.1. OM651 injector seal leaks (Black Death)
2.2. M270 water pump/coolant leaks
3.3. M133 turbocharger wear (AMG)

Live Feed

VehicleLocationIssueEnquiries

Mercedes CLA 220 d X117 (OM651)

London

Ticking noise from engine bay, suspected injector seal leak

enquiries

Mercedes CLA 250 X117 (M270)

Birmingham

Coolant loss, water pump failure

enquiries

Mercedes CLA 45 AMG X117 (M133)

Manchester

Turbo noise, suspected bearing wear

enquiries

Updated Monthly

FAQ

BMW 3 Series E90 rear three-quarter view

Why UK Mercedes X117 Owners Trust MercedesEngines.uk

Trusted X117 Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated, and reviewed by real Mercedes owners, as part of the Engine Finders network.
Compare X117 Engine Replacement Companies
see prices, warranty terms, and supply & fit options side‑by‑side before you commit.
UK Engine Replacement Services for X117
covering every variant from CLA 180 d to CLA 45 AMG, with supply‑only or full supply & fit available nationwide.

Find the best Mercedes X117 engine replacement UK drivers rely on. Compare real prices from trusted specialists on EnginesMarket today and get back on the road with confidence.

Compare Mercedes CLA‑Class X117 Engine Prices on EnginesMarket

Why UK Mercedes X117 Owners Trust MercedesEngines.uk

Trusted X117 Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated, and reviewed by real Mercedes owners, as part of the Engine Finders network.
Compare X117 Engine Replacement Companies
see prices, warranty terms, and supply & fit options side‑by‑side before you commit.
UK Engine Replacement Services for X117
covering every variant from CLA 180 d to CLA 45 AMG, with supply‑only or full supply & fit available nationwide.

Find the best Mercedes X117 engine replacement UK drivers rely on. Compare real prices from trusted specialists on EnginesMarket today and get back on the road with confidence.

Compare Mercedes CLA‑Class X117 Engine Prices on EnginesMarket