How much does a Mercedes A-Class W176 engine replacement cost in the UK?

A reconditioned W176 engine typically costs £2,200–£10,000+ supply only, depending on the engine — the volume M270.910 sits at £2,500–£4,000, while the M133 AMG unit ranges from £6,500–£10,000+. Fitting adds £650–£1,500. Use our calculator for a personalised figure.

Which Mercedes W176 engine is the most reliable?

The OM651.901 diesel (A180 CDI/A200 CDI) and the M270.910 petrol (A180/A200) are the most dependable. The OM651 is a proven Mercedes-built diesel with a 150,000-mile+ lifespan, while the M270 petrol is smooth, robust, and free of major failure modes. The M133 AMG is reliable for a 360bhp+ unit but demands higher maintenance budgets.

What are the common problems with the Mercedes A-Class W176?

Injector and EGR failure on the Renault-sourced OM607 diesel, VANOS and timing-chain wear on M270/M133 petrols, HPFP and turbo issues on the A45 AMG, and — unrelated to the engine — rear subframe corrosion on high-mileage cars.

Is the Mercedes A-Class W176 reliable?

It depends on the engine. The OM651 diesel and M270 petrol are genuinely robust and well-documented. The OM607 (Renault-sourced) is less refined and more prone to injector/EGR issues. The M133 is a high-strung performance engine — reliable if maintained, but expensive when it fails.

Which W176 engine should I avoid?

No engine outright — but the OM607.951 in the A160 CDI/A180 CDI is the one we'd advise against unless you're on a very tight budget. It feels underpowered in the W176's heavier body and its Renault-derived parts can be temperamental compared to Mercedes-built units.

How do I know if my W176 engine needs replacing?

Rough idle or loss of power (OM607), VANOS rattle or chain noise (M270/M133), or long cranking and limp mode (M133 HPFP) are key warnings. Use our diagnostic calculator for a personalised assessment.

Is it worth replacing a Mercedes A-Class W176 engine, or should I scrap the car?

Depends on the car's value. Against a well-kept £10,000+ W176 (especially an A250 or A45), a £3,500–£4,000 recon is 35–40% of the car's value — safe. Against a tired £4,000 example with a high-mileage OM607, a £3,000+ recon may exceed the car's worth — walk away. Our 70% Mercedes threshold is the line.

How long do Mercedes A-Class W176 engines last?

The OM651 diesel and M270 petrol can exceed 150,000 miles with proper servicing. The M133 AMG is typically good for 100,000+ miles if maintained to AMG standards, but its running costs are significantly higher. The OM607 is the shortest-lived due to its injector and EGR issues.

What is the difference between the W176 and other A-Class models / related cars?

The W176 (2012–2018) is the 5-door hatchback that launched Mercedes' MFA platform. The W177 (2018–present) is the fourth-generation A-Class with a new MFA2 platform and updated engines. The CLA-Class (C117) and GLA-Class (X156) share the MFA platform and many engines but are distinct body styles with separate Generation Pages — costs and labour access vary.

How do I find my Mercedes A-Class W176 engine code?

Listed on the VIN plate and vehicle documentation; the engine code is also stamped on the block. Tell us your variant (e.g., A200, A180 CDI, A45 AMG) and registration year, and we'll identify it — 25+ vetted Mercedes specialists will confirm it for free.

W176 Engine Replacement Cost UK

Name: Mercedes A-Class W176 UK Engine Enquiry Data 2025
Creator: MercedesEngines.uk

Mercedes A-Class W176 Engine Codes — The Complete Database

Every engine fitted to the W176 hatchback specifically — from the entry-level OM607 diesel to the 360bhp M133 AMG unit that redefined the hot-hatch segment.

Engine CodeFamilyFuelDisplacementPowerYears (W176 hatchback)Variants (badges)Reliability2025 EnquiriesAvg. Recon Cost

OM607.951OM607Diesel1.5L90–109 bhp2012–2018A160 CDI, A180 CDI★★★☆☆ [PROVISIONAL — pending dedicated Engine Page; see Data Note]— (pattern data)£2,200–£3,800 [MB-QUOTE]

OM651.901OM651Diesel1.8L109–136 bhp2012–2014A180 CDI, A200 CDI★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£2,800–£4,800 [MB-QUOTE]

OM651.930OM651Diesel2.2L177 bhp2015–2018A220 d 4MATIC★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£2,800–£4,800 [MB-QUOTE]

M270.910M270Petrol, turbo1.6L122–156 bhp2012–2018A180, A200★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£2,500–£4,000 [MB-QUOTE]

M270.920M270Petrol, turbo2.0L211 bhp2012–2018A250★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£3,500–£6,000 [MB-QUOTE]

M133.980M133Petrol, turbo2.0L360–381 bhp2013–2018A45 AMG 4MATIC★★★☆☆ [PROVISIONAL — see Data Note]— (pattern data)£6,500–£10,000+ [MB-QUOTE]

M133.980 (facelift)M133Petrol, turbo2.0L381 bhp2015–2018A45 AMG 4MATIC★★★☆☆ [PROVISIONAL — see Data Note]— (pattern data)£6,500–£10,000+ [MB-QUOTE]

Engine CodeFuelPowerYearsReliabilityEnquiriesAvg. Recon Cost

OM607.951OM607Diesel90–109 bhp2012–2018★★★☆☆ [PROVISIONAL — pending dedicated Engine Page; see Data Note]— (pattern data)£2,200–£3,800 [MB-QUOTE]

OM651.901OM651Diesel109–136 bhp2012–2014★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£2,800–£4,800 [MB-QUOTE]

OM651.930OM651Diesel177 bhp2015–2018★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£2,800–£4,800 [MB-QUOTE]

M270.910M270Petrol, turbo122–156 bhp2012–2018★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£2,500–£4,000 [MB-QUOTE]

M270.920M270Petrol, turbo211 bhp2012–2018★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£3,500–£6,000 [MB-QUOTE]

M133.980M133Petrol, turbo360–381 bhp2013–2018★★★☆☆ [PROVISIONAL — see Data Note]— (pattern data)£6,500–£10,000+ [MB-QUOTE]

M133.980 (facelift)M133Petrol, turbo381 bhp2015–2018★★★☆☆ [PROVISIONAL — see Data Note]— (pattern data)£6,500–£10,000+ [MB-QUOTE]

Overview

Mercedes A-Class W176 — Overview

The W176 is the third-generation A-Class and the first to sit on Mercedes' new MFA (Modular Front Architecture) platform, launched at the 2012 Geneva Motor Show.

It marked a radical departure from the tall, sandwich-platform W168 and W169 predecessors — lower, wider, and unapologetically premium. The engine range spans Renault-sourced OM607 diesels, Mercedes' own OM651 diesels, the M270 turbo-petrol fours, and the M133 AMG unit that made the A45 the world's most powerful production four-cylinder at launch. A mid-life facelift in 2015 brought revised styling and the 381bhp A45.

Key Facts

Platform

Mercedes MFA (shared with B-Class W246, CLA-Class C117)

Predecessor

W169

Successor

W177

Sibling models on this platform

B-Class (W246), CLA-Class (C117), GLA-Class (X156)

Market Intelligence

The W176 A-Class generated 122 real UK engine enquiries in 2025 [MB-VERIFIED], concentrated on the M270 petrol fours and the OM651 diesel as these cars exit manufacturer warranty.

Mercedes A-Class W176 — Overview

The W176 is the third-generation A-Class and the first to sit on Mercedes' new MFA (Modular Front Architecture) platform, launched at the 2012 Geneva Motor Show.

It marked a radical departure from the tall, sandwich-platform W168 and W169 predecessors — lower, wider, and unapologetically premium. The engine range spans Renault-sourced OM607 diesels, Mercedes' own OM651 diesels, the M270 turbo-petrol fours, and the M133 AMG unit that made the A45 the world's most powerful production four-cylinder at launch. A mid-life facelift in 2015 brought revised styling and the 381bhp A45.

Key Facts

Platform

Mercedes MFA (shared with B-Class W246, CLA-Class C117)

Predecessor

W169

Successor

W177

Sibling models on this platform

B-Class (W246), CLA-Class (C117), GLA-Class (X156)

Market Intelligence

The W176 A-Class generated 122 real UK engine enquiries in 2025 [MB-VERIFIED], concentrated on the M270 petrol fours and the OM651 diesel as these cars exit manufacturer warranty.

Best & Worst Engines

Best Diesel Overall

OM651.901

“The 1.8-litre OM651 is the sweet spot in the W176 diesel range — no timing chain tensioner issues, no injector seal 'Black Death' that plagued older CDI units, and a genuine 150,000-mile-plus lifespan with routine servicing. The 2.2-litre OM651.930 in the A220 d is equally robust.”

Who it's for: buyers who want a diesel without the entry-level OM607's limitations.

Best Petrol Overall

M270.920 (A250)

“The 2.0-litre turbo M270 delivers 211bhp in a genuinely refined, responsive package. It's the engine that convinced the world Mercedes could do a proper premium hatchback — smooth, punchy, and without the M133's eye-watering running costs.”

Who it's for: buyers who want the performance of a hot hatch without the AMG tax.

Highest Risk

OM607.951

“Renault-sourced 1.5-litre diesel. Adequate economy but feels underpowered in the W176's heavier body and lacks the OM651's refinement and durability. Injector and EGR issues are more common than on the Mercedes-built OM651.”

Who it's for: budget-conscious buyers prioritising fuel economy over everything else.

Most Expensive Failure

M133.980 (A45 AMG)

“When a 360–381bhp four-cylinder goes wrong, it goes wrong expensively. Turbocharger failure, high-pressure fuel pump issues, and the sheer labour intensity of working in the AMG engine bay mean replacement costs frequently hit five figures. The A45's M133 is a masterpiece — but it's a masterpiece with a maintenance bill to match.”

Who it's for: buyers with deep pockets and a full AMG service history.

Best Value

M270.910 (A180/A200)

“The 1.6-litre turbo M270 offers genuinely good economy, adequate power (122–156bhp), and the same fundamental robustness as its 2.0-litre sibling. It's the volume engine for good reason — cheap to run, cheap to replace, and more than enough for UK roads.”

Who it's for: buyers who want a premium hatchback without the premium running costs.

Most Overlooked

OM651.930 (A220 d 4MATIC)

“The 2.2-litre diesel is rare on UK roads compared to the volume OM651.901 and M270 models, but it offers 177bhp, all-wheel-drive traction, and genuine longevity. It's the W176's sleeper pick — a diesel that drives like a petrol.”

Who it's for: buyers who need diesel economy with four-wheel-drive capability.

Best Diesel Overall

OM651.901

“The 1.8-litre OM651 is the sweet spot in the W176 diesel range — no timing chain tensioner issues, no injector seal 'Black Death' that plagued older CDI units, and a genuine 150,000-mile-plus lifespan with routine servicing. The 2.2-litre OM651.930 in the A220 d is equally robust.”

Who it's for: buyers who want a diesel without the entry-level OM607's limitations.

Best Petrol Overall

M270.920 (A250)

“The 2.0-litre turbo M270 delivers 211bhp in a genuinely refined, responsive package. It's the engine that convinced the world Mercedes could do a proper premium hatchback — smooth, punchy, and without the M133's eye-watering running costs.”

Who it's for: buyers who want the performance of a hot hatch without the AMG tax.

Highest Risk

OM607.951

“Renault-sourced 1.5-litre diesel. Adequate economy but feels underpowered in the W176's heavier body and lacks the OM651's refinement and durability. Injector and EGR issues are more common than on the Mercedes-built OM651.”

Who it's for: budget-conscious buyers prioritising fuel economy over everything else.

Most Expensive Failure

M133.980 (A45 AMG)

“When a 360–381bhp four-cylinder goes wrong, it goes wrong expensively. Turbocharger failure, high-pressure fuel pump issues, and the sheer labour intensity of working in the AMG engine bay mean replacement costs frequently hit five figures. The A45's M133 is a masterpiece — but it's a masterpiece with a maintenance bill to match.”

Who it's for: buyers with deep pockets and a full AMG service history.

Best Value

M270.910 (A180/A200)

“The 1.6-litre turbo M270 offers genuinely good economy, adequate power (122–156bhp), and the same fundamental robustness as its 2.0-litre sibling. It's the volume engine for good reason — cheap to run, cheap to replace, and more than enough for UK roads.”

Who it's for: buyers who want a premium hatchback without the premium running costs.

Most Overlooked

OM651.930 (A220 d 4MATIC)

“The 2.2-litre diesel is rare on UK roads compared to the volume OM651.901 and M270 models, but it offers 177bhp, all-wheel-drive traction, and genuine longevity. It's the W176's sleeper pick — a diesel that drives like a petrol.”

Who it's for: buyers who need diesel economy with four-wheel-drive capability.

Mercedes A-Class W176 — Ownership Economics

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

OM607.95160k–100kInjector/EGR issues£400–£800£2,200–£3,800

Budget Diesel — economy-focused, but feels underpowered.

OM651.90180k–150kGenerally robust£300–£600£2,800–£4,800

Best Diesel — the W176's most dependable oil-burner.

OM651.93080k–150kGenerally robust£300–£600£2,800–£4,800

Rare Gem — AWD diesel, hard to find but worth it.

M270.91080k–120kVANOS solenoids£300–£600£2,500–£4,000

Best Petrol (Value) — reliable, cheap to run.

M270.92080k–120kVANOS solenoids£300–£600£3,500–£6,000

Best Petrol (Performance) — 211bhp without AMG costs.

M133.98040k–80kTurbo/HPFP£1,500–£3,000£6,500–£10,000+

Most Expensive — AMG tax is real.

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

OM607.95160k–100kInjector/EGR issues£400–£800£2,200–£3,800

Budget Diesel — economy-focused, but feels underpowered.

OM651.90180k–150kGenerally robust£300–£600£2,800–£4,800

Best Diesel — the W176's most dependable oil-burner.

OM651.93080k–150kGenerally robust£300–£600£2,800–£4,800

Rare Gem — AWD diesel, hard to find but worth it.

M270.91080k–120kVANOS solenoids£300–£600£2,500–£4,000

Best Petrol (Value) — reliable, cheap to run.

M270.92080k–120kVANOS solenoids£300–£600£3,500–£6,000

Best Petrol (Performance) — 211bhp without AMG costs.

M133.98040k–80kTurbo/HPFP£1,500–£3,000£6,500–£10,000+

Most Expensive — AMG tax is real.

The W176 rule

A £2,800–£4,800 OM651 recon against a £6,000 W176 sits at 47–80% of the car's value. On a sub-£5,000 W176, that brushes our 70% Mercedes threshold — we'll honestly tell you to walk away. Against a well-kept £10,000+ example (particularly an A45 AMG or A250), the same recon drops to a routine 28–48% — a repair decision, not a financial one. Value the car first.

Common Problems

01

OM607.951

Injector & EGR Failure

Affected models:

A160 CDI, A180 CDI (Renault-sourced diesel).

Typical failure mileage:

60,000–100,000 miles.

Root cause:

The OM607 is a Renault K9K derivative — injector seal failure (carbon buildup, 'Black Death' style) and EGR valve clogging are common on high-mileage examples, particularly those used for short urban trips.

Tiered Cost Table

Tier

Dealer

Specialist

Scope

Dealer

Specialist

Viability

Our Recommendation

At the first sign of rough idle or loss of power, get the injector seals and EGR inspected immediately — a £400–£800 repair is dramatically cheaper than the £2,200–£3,800 replacement that follows if ignored. On a W176 worth under £5,000, this decision alone determines whether the car stays economically viable.

Compare OM607 engine prices for your W176 A180 CDI

02

M270/M133

VANOS & Timing Chain Wear

Affected models:

All M270 and M133 petrol variants — A180, A200, A250, A45 AMG.

Typical failure mileage:

60,000–120,000 miles.

Root cause:

The M270 family's VANOS solenoids and timing chain tensioners can wear with age, particularly on cars with extended oil-change intervals. The M133's higher output accelerates this wear.

Tiered Cost Table

Tier

Dealer

Specialist

Scope

Dealer

Specialist

Viability

Our Recommendation

On any W176 petrol over 60,000 miles, have the VANOS solenoids and chain tensioner checked at every service — £500–£900 now is far cheaper than the £2,500–£4,000+ replacement that follows a skipped chain.

Compare M270 engine prices for your W176 A250

03

A45

AMG M133 Turbo & HPFP Failure

Affected models:

A45 AMG 4MATIC (all years).

Typical failure mileage:

40,000–80,000 miles.

Root cause:

The M133's high-pressure fuel pump and turbocharger are pushed to their limits — 360–381bhp from 2.0 litres creates significant heat and stress. HPFP failure causes long cranking and limp mode; turbo failure is usually preceded by a whistling noise and loss of power.

Tiered Cost Table

Tier

Dealer

Specialist

Scope

Dealer

Specialist

Viability

Our Recommendation

If your A45 has no documented HPFP or turbo history, treat it as overdue preventative maintenance — £1,500–£2,500 now is far cheaper than the £6,500+ replacement that follows a high-speed failure. This is the single most important financial decision an A45 owner will make.

Compare M133 engine prices for your W176 A45 AMG

04

W176

Rear Suspension & Subframe Corrosion

Affected models:

All W176 variants.

W176 Rear Suspension & Subframe Corrosion

Typical failure mileage:

80,000+ miles.

Root cause:

Not an engine failure, but a documented W176 weak point — rear axle carrier and subframe mount corrosion, particularly on UK cars exposed to salt and moisture.

Tiered Cost Table

Tier

Dealer

Specialist

Scope

Dealer

Specialist

Viability

Our Recommendation

Have the rear subframe inspected on any W176 over 80,000 miles — it's the single most common non-engine reason an otherwise sound W176 fails an MOT.

Compare W176 rear subframe repair quotes

W176 Engine Replacement Costs — By Engine and Condition

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

A160 CDI / A180 CDIOM607.951£1,000–£1,800£2,200–£3,800£3,500–£5,5008–12 hrs

A180 CDI / A200 CDIOM651.901£1,200–£2,200£2,800–£4,800£4,000–£6,5008–12 hrs

A220 d 4MATICOM651.930£1,500–£2,500£2,800–£4,800£4,000–£6,50010–14 hrs

A180 / A200M270.910£1,200–£2,000£2,500–£4,000£3,500–£5,5008–12 hrs

A250M270.920£1,500–£2,800£3,500–£6,000£5,000–£7,50010–14 hrs

A45 AMG 4MATICM133.980£3,500–£6,000£6,500–£10,000+£8,500–£14,00012–16 hrs

No Generation variance from the Model Page's baseline figures — W176 hatchback shares identical engine-bay access with its W246 B-Class sibling, so costs are inherited directly per the Authority Model, with no divergence note required. M133 costs reflect AMG-specific parts and specialist labour.

Core Variants

Diesel Variants

A160 CDIA180 CDIA200 CDIA220 CDIA220 d 4MATIC

Petrol Variants

A180A200A250A250 4MATICA45 AMG 4MATIC

Scope note: All variants listed are W176 5-door hatchback only. The related CLA-Class (C117), B-Class (W246), and GLA-Class (X156) share many of these engines but are covered on their own Generation Pages, as fitment and labour access vary by platform.

Core Variants

Diesel Variants

A160 CDIA180 CDIA200 CDIA220 CDIA220 d 4MATIC

Petrol Variants

A180A200A250A250 4MATICA45 AMG 4MATIC

Scope note: All variants listed are W176 5-door hatchback only. The related CLA-Class (C117), B-Class (W246), and GLA-Class (X156) share many of these engines but are covered on their own Generation Pages, as fitment and labour access vary by platform.

Market Intelligence

Most Requested E90 Engines (2025)

1.1. M270.910 (A180/A200) — volume petrol [PATTERN DATA]
2.2. OM651.901 (A180/A200 CDI) — volume diesel [PATTERN DATA]
3.3. M133.980 (A45 AMG) — high‑performance niche [PATTERN DATA]

Most Requested E90 Variants

1.1. A200
2.2. A180 CDI
3.3. A45 AMG [PATTERN DATA]

Average E90 Replacement Cost

£2,500–£6,500 reconditioned, supply only [MB-QUOTE]

Most Common E90 Failures

1.1. OM607 injector/EGR failure
2.2. M270/M133 VANOS wear
3.3. Rear subframe corrosion [PATTERN DATA]

Live Feed

VehicleLocationIssueEnquiries

Mercedes A200 W176 (M270)

London

VANOS solenoid rattle

4

enquiries

Mercedes A180 CDI W176 (OM651)

Birmingham

Pre‑purchase inspection

3

enquiries

Mercedes A45 AMG W176 (M133)

Manchester

HPFP failure

2

enquiries

Updated Monthly

FAQ

BMW 3 Series E90 rear three-quarter view

Why UK Mercedes A-Class W176 Owners Trust MercedesEngines.uk

Trusted W176 Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real W176 owners, as part of the Engine Finders network.
Compare W176 Engine Replacement Companies
see prices, warranty terms and supply & fit options side‑by‑side before you commit.
UK Engine Replacement Services for W176
covering every variant from A160 CDI to A45 AMG, with supply‑only or full supply & fit available nationwide.

Find the best Mercedes A-Class W176 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 A-Class W176 Engine Prices on EnginesMarket

Why UK Mercedes A-Class W176 Owners Trust MercedesEngines.uk

Trusted W176 Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real W176 owners, as part of the Engine Finders network.
Compare W176 Engine Replacement Companies
see prices, warranty terms and supply & fit options side‑by‑side before you commit.
UK Engine Replacement Services for W176
covering every variant from A160 CDI to A45 AMG, with supply‑only or full supply & fit available nationwide.

Find the best Mercedes A-Class W176 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 A-Class W176 Engine Prices on EnginesMarket

Mercedes A-Class W176 Engines — The Complete UK Guide

Mercedes A-Class W176 Engine Codes — The Complete Database

Mercedes A-Class W176 — Overview

Mercedes A-Class W176 — Overview

Best & Worst Engines

Mercedes A-Class W176 — Ownership Economics

Common Problems

W176 Engine Replacement Costs — By Engine and Condition

Core Variants

Core Variants

Market Intelligence

FAQ

Why UK Mercedes A-Class W176 Owners Trust MercedesEngines.uk

Why UK Mercedes A-Class W176 Owners Trust MercedesEngines.uk