MercedesBenz A-Class 200 CDI Engine Replacement - Compare Prices & Get Quotes
Get quotes today from trusted UK Mercedes-Benz A-Class 200 CDI engine specialists. Compare prices on reconditioned, rebuilt and used engines for your A200 CDI - supply & fit available nationwide.
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12-Month Warranty
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From £1,500 to £5,000
Used from £500 · Reconditioned from £1,500 · Common codes: OM640.941, OM651.901, OM651.930
From £500
Tested, bare/short engine
From £1,500
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
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3 Simple Steps3 Simple Stepsto Finding the Best Mercedes-Benz A-Class 200 CDI Replacement Engineto Finding the Best Mercedes-Benz A-Class 200 CDI Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryMercedes-Benz A-Class 200 CDI - Engine History & Specs at a Glance
The 200 CDI badge arrived with the second-generation W169 A-Class in 2004 as the range-topping diesel, using Mercedes' own 2.0-litre OM640 engine with 140 hp. It was replaced in 2012 by the W176-generation A200 CDI, which initially used the 1.8-litre OM651 before switching to a 2.1-litre OM651 in 2014. The badge continued into the W177 generation as the A200d, marking the end of the "CDI" naming.
Variant HistoryMercedes-Benz A-Class 200 CDI - Engine History & Specs at a Glance
The 200 CDI badge arrived with the second-generation W169 A-Class in 2004 as the range-topping diesel, using Mercedes' own 2.0-litre OM640 engine with 140 hp. It was replaced in 2012 by the W176-generation A200 CDI, which initially used the 1.8-litre OM651 before switching to a 2.1-litre OM651 in 2014. The badge continued into the W177 generation as the A200d, marking the end of the "CDI" naming.
Mercedes-Benz A-Class 200 CDI
Fuel TypeDiesel
Engine Size Range1.8L - 2.1L across the badge's history
Power Output Range136-140 hp (100-103 kW) across all generationsEngine History Timeline
OM640 DE 20 LA (640.941) 2.0L diesel, 140 hp - W169 A200 CDI launch; range-topping diesel with 300 Nm torque
Facelift with revised engine management; power remains 140 hp emissions improved
OM651 DE 18 (651.901) 1.8L diesel, 136 hp - W176 A200 CDI launch; rear-mounted timing chain design
OM651 DE 22 LA (651.930) 2.1L diesel, 136 hp - W176 A200 CDI switches to 2.1L displacement; available with 4MATIC
W177 generation launches; "200 CDI" badge replaced by "A200d" with OM654 engine
Key Specs Snapshot
Fuel TypeDieselEngine Size Range1.8L - 2.1L across the badge's historyPower Output Range136-140 hp (100-103 kW) across all generationsYears Produced2004-2018 (as "200 CDI")Every engine fitted to the Mercedes-Benz A-Class 200 CDI is covered below, with UK rebuilt pricing and known failure points.
Mercedes-Benz A-Class 200 CDI Engine Codes - Specifications & Replacement CostMercedes-Benz A-Class 200 CDI Engine Codes - Specifications & Replacement Cost
2.0L Diesel (2004-2012)
Power Output140 hp (103 kW) at 4,200 rpmTorque300 NmYears Fitted2004-2012
Compatible Trim Levels
- A200 CDI (W169)
- A200 CDI Classic
- A200 CDI Elegance
- A200 CDI Avantgarde
- A200 CDI Sport
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£500-£1,200
Reconditioned
Addressed known issues, tested
£1,500-£2,800
Rebuilt
Full teardown, upgraded internals
£2,000-£3,500
Common Failure
The OM640 is a robust engine but timing chain wear and tensioner failure are well-documented, particularly on higher-mileage units. EGR cooler cracking and DPF clogging are also common on vehicles used predominantly for urban driving.
The A200 CDI has been powered by three different diesel engines across its production life - the robust OM640 (W169), the torque-rich OM651.901 (early W176), and the 2.1-litre OM651.930 (late W176). Each has distinct failure patterns. Rebuilt A200 CDI engines through EnginesMarket include upgraded components addressing the original failure points, plus a minimum 12-month unlimited-mileage warranty.
Why the W176 A200 CDI Rattles on Cold Start
Affected Vehicles
Mercedes-Benz A-Class 200 CDI (OM651.901 and OM651.930, W176, 2012-2018)
Typical Failure Mileage
80,000-150,000 miles
Root Cause
The OM651 uses a single timing chain located at the rear of the engine near the gearbox. The plastic chain tensioner guides wear prematurely and the hydraulic tensioner can lose pressure, allowing chain stretch and camshaft timing drift.
Why It Happens
The OM651 uses a single timing chain located at the rear of the engine near the gearbox. The plastic chain tensioner guides wear prematurely and the hydraulic tensioner can lose pressure, allowing chain stretch and camshaft timing drift.
Dealer (parts + labour)
£2,200-£3,200
Specialist (parts + labour)
£1,400-£2,200
What it involves
Replace timing chain, tensioner, guides, sprockets
Suitability
Best done at first rattle; prevents catastrophic failure
1 - 2 daysDealer (parts + labour)
£5,000-£7,500
Specialist (parts + labour)
£2,500-£5,000
What it involves
Supply & fit rebuilt OM651 with upgraded timing components
Suitability
Required if chain has jumped; bent valves almost certain
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Preventative Timing Chain & Tensioner Replacement Minor | £2,200-£3,200 | £1,400-£2,200 | Replace timing chain, tensioner, guides, sprockets | Best done at first rattle; prevents catastrophic failure | 1 - 2 days |
 Full Replacement - rebuilt OM651 engine Best Value | £5,000-£7,500 | £2,500-£5,000 | Supply & fit rebuilt OM651 with upgraded timing components | Required if chain has jumped; bent valves almost certain | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical W176 A200 CDI is worth £5,000-£14,000 depending on condition and mileage. For vehicles under £6,000, a preventative chain replacement (£1,400-£2,200) is usually the better financial decision than a full engine replacement. For higher-value examples, a rebuilt OM651 with warranty (£2,500-£5,000) offers peace of mind. W169 A200 CDI values are typically £1,500-£4,000 - a full engine replacement often exceeds the car's value.
Our Recommendation
Our Recommendation
If you hear a rattling noise from the rear of the engine on cold starts - especially between 80,000 and 120,000 miles - act immediately. A preventative chain replacement at a specialist saves thousands compared to waiting for failure. Once the chain jumps, piston-to-valve contact is almost certain and engine replacement becomes the only viable option.
Don't Let Engine Failure Write Off Your Mercedes-Benz A-Class 200 CDI
Engine failure doesn't always mean the end of the road for your A200 CDI. Whether your OM640 needs a timing chain replacement, your OM651 is suffering from EGR cooler failure, or a full rebuild is required, EnginesMarket makes it simple to compare prices from trusted UK Mercedes-Benz A-Class 200 CDI specialists. Every rebuilt engine supplied through our network includes upgraded components designed to address the original failure point - plus a minimum 12-month unlimited-mileage warranty with nationwide delivery. Compare prices today and get back on the road without the main dealer premium.
Compare rebuilt OM651 Mercedes-Benz A-Class 200 CDI engine prices
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"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 EnginesMarket'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 A-Class 200 CDI. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Mercedes-Benz A-Class 200 CDI Engine ReplacementFrequently Asked Questions
Question 1How much does a Mercedes-Benz A-Class 200 CDI engine replacement cost in the UK-
A replacement engine for an A200 CDI typically costs between £500 and £5,000 depending on the engine code and condition. Used OM640 units start from £500-£1,200, reconditioned from £1,500-£2,800, and fully rebuilt OM651 engines from £2,500-£5,000. Labour for supply & fit adds £400-£800.
- Used OM640 (W169): £500-£1,200
- Rebuilt OM651.901 (W176, 2012-2014): £2,500-£4,800
- Rebuilt OM651.930 (W176, 2014-2018): £2,800-£5,000
Question 2What are the signs of timing chain failure in a Mercedes-Benz A-Class 200 CDI-
On OM651-equipped A200 CDI models (W176, 2012-2018), the most common symptom is a rattling noise from the rear of the engine on cold start. Other signs include loss of power, engine misfires, and the engine management light illuminating. If you hear any unusual sounds, have the timing system inspected immediately - ignoring the rattle can lead to catastrophic engine failure.
- Cold-start rattle from the rear of the engine
- Loss of power and rough running
- Engine management light activation
Question 3Is it worth replacing the engine in a Mercedes-Benz A-Class 200 CDI-
It depends on the generation and condition. A W169 A200 CDI is typically worth £1,500-£4,000 - a full engine replacement often exceeds the car's value, making a used engine or targeted repair more economical. A W176 A200 CDI is worth £5,000-£14,000 - a rebuilt OM651 engine (£2,500-£5,000) can be a worthwhile investment if you plan to keep the car. Always compare the cost of repair against the car's market value.
- W169 (2004-2012): used engine or targeted repair
- W176 (2012-2018): rebuilt engine with warranty is viable
- Vehicle worth over £6,000: replacement usually justifies the cost
Question 4How long does a Mercedes-Benz A-Class 200 CDI engine last-
The OM640 (W169) and OM651 (W176) engines are known for their durability and can exceed 200,000-250,000 miles with proper maintenance. Regular oil changes (every 10,000 miles) and timely replacement of timing chain components and EGR coolers are key to maximising engine life. The OM651.930 2.1L variant is particularly robust when properly maintained.
- OM640/OM651: 200,000+ miles achievable
- Regular maintenance is essential for all variants
- Timing chain and EGR cooler are the main wear items
Question 5What is the difference between the OM640, OM651.901 and OM651.930 engines in the A200 CDI-
The OM640 is Mercedes' own 2.0-litre four-cylinder diesel used in the W169 A200 CDI (2004-2012), producing 140 hp. The OM651.901 is a 1.8-litre diesel used in the early W176 A200 CDI (2012-2014), producing 136 hp with a rear-mounted timing chain. The OM651.930 is a 2.1-litre diesel introduced in the 2014 facelift, also producing 136 hp but with improved emissions and available with 4MATIC all-wheel drive.
- OM640: 2.0L, 140 hp, W169 (2004-2012)
- OM651.901: 1.8L, 136 hp, W176 (2012-2014)
- OM651.930: 2.1L, 136 hp, W176 (2014-2018), available with 4MATIC
Question 6What causes the Mercedes-Benz A-Class 200 CDI to lose power-
Power loss in the A200 CDI can be caused by several issues depending on the engine. On OM651 engines, timing chain stretch can cause cam timing drift, reducing power. On both OM640 and OM651, EGR valve clogging, DPF blockage, or turbocharger actuator failure are common culprits. On OM651.930, turbo stress can be higher in 4MATIC applications. A diagnostic check with Mercedes STAR or compatible equipment is essential to identify the exact cause.
- Timing chain stretch (OM651) - power loss + rattling
- EGR valve / DPF clogging - common on all diesels
- Turbo actuator failure - especially on higher-mileage units
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Comparing quotes for your A200 CDI is free, no-obligation, and specific to your exact OM640, OM651.901 or OM651.930 engine code and generation. Our vetted UK specialists provide transparent pricing on used, reconditioned and rebuilt engines - with a minimum 12-month unlimited-mileage warranty on every rebuilt unit. Enter your registration above, compare prices, and choose the right engine for your A-Class today.
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