Engines Market

Mercedes-Benz B200 CDI Specialists

Mercedes-Benz B Class B200 CDI Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK Mercedes-Benz B Class B200 CDI engine specialists. Compare prices on reconditioned, rebuilt and used engines for both the W245 (2005-2011) and W246 (2011-2018) generations - supply & fit available across the UK.

Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Mercedes-Benz B Class B200 CDI Engine
from£1,800 to £2,900
  • Usedfrom £900
  • Reconditionedfrom £1,500
  • Common codesOM640.941, OM651.901
Mercedes Benz b-class Mercedes-Benz B Class B200 CDI Used Engine — OM640.941Mercedes Benz b-classUsed Engine — OM640.941Mercedes Benz b-class Mercedes-Benz B Class B200 CDI Reconditioned Engine — OM640.941Mercedes Benz b-classReconditioned Engine — OM640.941Mercedes Benz b-class Mercedes-Benz B Class B200 CDI Rebuilt Engine — OM640.941Mercedes Benz b-classRebuilt Engine — OM640.941

Get your free Mercedes Benz b-class Mercedes-Benz B Class B200 CDI engine quotes

Secure enquiry — no spam, no pressure. Genuine quotes only from vetted UK specialists.

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide Network

How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

Mercedes-Benz B Class B200 CDI Engine History & Specs at a Glance

The Mercedes-Benz B Class B200 CDI launched in April 2005 as the range-topping diesel in the first-generation W245 range. Powered initially by a 2.0-litre OM640.941 diesel producing 140bhp and 300Nm of torque, the B200 CDI was replaced in 2011 with the second-generation W246, switching to the 1.8-litre OM651.901 BlueEFFICIENCY unit producing 136bhp with improved fuel economy and lower emissions.

Mercedes-Benz B Class B200 CDI

  1. April 2005 - W245 launch: OM640.941 2.0L diesel, 140bhp, 300Nm torque, Euro 4 emissions

  2. 2008

    W245 facelift: cosmetic updates only; OM640.941 continues with revised tuning (280Nm torque)

  3. November 2011 - W246 launch: OM651.901 1.8L diesel BlueEFFICIENCY, 136bhp, 300Nm torque, Euro 5 emissions

  4. 2014

    W246 facelift: OM651.901 continues with emissions updates

Every engine fitted to the Mercedes-Benz B Class B200 CDI is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Mercedes-Benz B Class B200 CDI Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

OM640.941 — 2.0L Diesel (2005-2011) engine

OM640.941 — 2.0L Diesel (2005-2011)

Power Output
140bhp (103kW) at 4,200rpm
Torque
300Nm at 1,600-3,000rpm (2005-2008); 280Nm (2008-2011 facelift)
Years Fitted
2005-2011 (W245 generation)
Displacement
1,991cc
Compression Ratio
18.0:1

Can’t find your exact engine code?

-> Get quotes for OM640.941 Mercedes-Benz B Class B200 CDI engine replacement

Common Problems

Mercedes-Benz B Class B200 CDI Engine Problems Repair Cost vs Replacement

The Mercedes-Benz B Class B200 CDI is considered one of the most reliable diesel variants in the B Class range, with many examples exceeding 200,000 miles. However, both engine families - the OM640.941 in W245 cars and the OM651.901 in W246 models - have well-documented failure points. Timing chain tensioner issues dominate OM651 enquiries, while injector and turbo failures affect higher-mileage OM640 units. Every rebuilt engine supplied through EnginesMarket includes upgraded components designed to address the original failure point, plus a minimum 12-month unlimited mileage warranty.

Common failure points and repair options

Timing Chain Tensioner Failure

Affected
Mercedes-Benz B Class B200 CDI (OM651.901, 2011-2018, W246)
Typical failure mileage
60,000-100,000 miles
Root cause
The timing chain tensioner loses hydraulic pressure, allowing chain slack and guide rail fracture. On OM651 diesels, the chain is located at the rear of the engine (gearbox side), requiring gearbox removal for replacement. A rattling noise on cold start is the first warning sign.

Repair options

Repair tierDealer priceSpecialist price
Preventative - Timing Chain & Tensioner Replacement£1,600-£2,400£900-£1,400
Intermediate - Chain Failure With Valve Damage£3,500-£5,000£2,200-£3,200
Full Replacement - Rebuilt/Reconditioned Engine£6,000-£8,500£1,800-£2,900
Our recommendation
On a W246 B200 CDI, if you hear chain rattle on cold start but the engine still runs smoothly, a specialist preventative chain replacement (£900-£1,400) is excellent value. If the chain has already jumped and valves are bent, compare rebuilt engine prices - a specialist fitted unit at £1,800-£2,900 often costs less than a dealer head rebuild and delivers a fresh warranty.
-> Compare rebuilt OM651.901 Mercedes-Benz B Class B200 CDI engine prices

Injector Failure

Affected
Mercedes-Benz B Class B200 CDI (OM640.941, 2005-2011, W245)
Typical failure mileage
100,000-140,000 miles
Root cause
Injector coil pack failure, seal leakage or carbon buildup around the injector nozzle causes misfire, rough idle, excessive black smoke and hard starting when hot. Injector failure can lead to bore wash, damaging piston rings and cylinder bores.

Repair options

Repair tierDealer priceSpecialist price
Minor - Single Injector Replacement£550-£800£350-£500
Intermediate - Full Injector Set Replacement£1,800-£2,500£1,100-£1,600
Full Replacement - Rebuilt Engine With Upgraded Injectors£5,500-£7,500£1,800-£2,800
Our recommendation
Single injector failure is common on OM640 engines beyond 100,000 miles. A specialist replacement at £350-£500 is straightforward. However, if you're experiencing hard start when hot plus misfire and smoke, multiple injectors are likely failing - a full set replacement at £1,100-£1,600 is more cost-effective than repeated single swaps. Only consider engine replacement if injector failure has caused bore wash or the engine has other major issues.
-> Get quotes for OM640.941 injector replacement and rebuilt engines for your B200 CDI

DPF & EGR Cooler Blockage

Affected
Mercedes-Benz B Class B200 CDI (OM640.941, 2005-2011; OM651.901, 2011-2018)
Typical failure mileage
70,000-110,000 miles (DPF); 60,000-90,000 miles (EGR cooler)
Root cause
On both OM640 and OM651 engines, DPF blockages are common in vehicles used for short trips or urban driving, where the filter cannot regenerate properly. Soot accumulation triggers warning lights, reduced performance and increased fuel consumption. EGR valve clogging from carbon buildup is also prevalent.

Repair options

Repair tierDealer priceSpecialist price
Minor - EGR Valve/Cooler Replacement£900-£1,300£550-£850
Intermediate - DPF Clean & EGR Replacement£1,200-£1,800£700-£1,100
Full Replacement - Rebuilt Engine With New Emissions Components£6,000-£8,500£1,800-£2,900
Our recommendation
On a B200 CDI beyond 80,000 miles, regular motorway driving helps the DPF regenerate naturally - short-trip cars are most at risk. If your DPF is clogged but not melted, an off-car professional clean (£700-£1,100) restores function. If the car has been driven in limp mode for extended periods, the DPF and turbo may be beyond repair - at that stage, a rebuilt engine with new emissions components is the only reliable long-term solution.
-> Compare rebuilt OM640.941 & OM651.901 Mercedes-Benz B Class B200 CDI engine prices with DPF and EGR replacements

Don't Let Engine Failure Write Off Your Mercedes-Benz B Class B200 CDI

Engine failure doesn't have to mean the end of the road for your B200 CDI. Whether you're facing timing chain rattle on an OM651.901, injector failure on an OM640.941, or DPF blockages on either generation, EnginesMarket makes it simple to compare prices from trusted UK Mercedes-Benz B Class B200 CDI specialists. Every rebuilt engine includes upgraded components designed to address the original failure point - plus a minimum 12-month unlimited mileage warranty. Compare prices today, choose a vetted specialist, and get back on the road without the main dealer premium.

Compare Mercedes-Benz B Class B200 CDI Engine Replacement Prices Now ->

FAQ

Mercedes-Benz B Class B200 CDI Engine ReplacementFrequently Asked Questions

Everything Mercedes-Benz B Class B200 CDI owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Why Choose Us

Compare Mercedes-Benz B Class B200 CDI Engine Prices Today

Comparing quotes for your Mercedes-Benz B Class B200 CDI engine replacement is completely free and carries no obligation. Simply enter your registration above, tell us your engine code (OM640.941 or OM651.901), and receive tailored prices from trusted UK specialists who stock the right unit for your generation. Every rebuilt engine includes a minimum 12-month unlimited mileage warranty - compare today and get back on the road with confidence.

1,000+1,000+ B200 CDI engines supplied through our network
12-Month12-Month Warranty on every rebuilt B200 CDI engine
NationwideNationwide UK delivery
Get Free Mercedes-Benz B Class B200 CDI Engine Quotes ->

Compare quotes from trusted UK Mercedes-Benz B Class B200 CDI engine specialists with warranty-backed rebuilt, reconditioned and used options nationwide.