How much does a Mercedes‑Benz V250d / V300d engine replacement cost in the UK?

A reconditioned OM654 engine typically costs £3,000–£6,500 supply only for the V250d, and £4,000–£8,500 for the V300d. Fitting adds £1,000–£1,600. A reconditioned engine typically costs £1,200–£2,200, with total installed cost around £1,800–£2,800. Use our calculator for a figure specific to your car.

What are the common problems with the Mercedes‑Benz V250d / V300d?

OM654 camshaft and tappet wear (ticking noise), timing chain wear (cold‑start rattle — recall on some models), water pump failure (coolant loss, overheating), AdBlue system faults (NOx sensors, pump, level sensor), and oil leaks (valve cover gasket). The timing chain and water pump are the most critical — if either fails, the engine can be destroyed.

Is it worth replacing a Mercedes‑Benz V250d / V300d engine, or should I scrap the car?

Depends on vehicle value. Against a well‑kept V‑Class worth £15,000–£30,000, a £4,000–£8,500 recon is a manageable 13–57% of the vehicle's value — worth it for a well‑maintained example. Given the V‑Class's strong retained values and popularity as a premium MPV, replacement is usually viable for vehicles in good condition.

How do I find my Mercedes‑Benz V250d / V300d engine code?

Listed on the VIN plate and vehicle documentation. The V250d and V300d both use the OM654 2.0‑litre four‑cylinder diesel engine. Tell us your registration date and we'll confirm it for free.

Can I repair the OM654's timing chain, or does it need a new engine?

Yes — if caught early. A timing chain and tensioner replacement (£1,500–£4,000) is far cheaper than a catastrophic chain failure (£3,500–£8,500 engine replacement). At the first sign of cold‑start rattle, book an inspection immediately. A recall was issued for certain OM654 engines where chain bolts or links could wear — check if your vehicle is affected.

Mercedes-Benz V250d / V300d2014–presentOM654 2.0 Diesel

Mercedes-Benz V250d / V300d Engine Replacement — Compare Prices & Get Quotes

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Mercedes V250d / V300d Engines — from £2,500 to £8,500Code: OM654

Mercedes V250d / V300d Engines — from £2,500 to £8,500· Code: OM654

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The V250d / V300d THROUGH TIME — Era Map

Four generations. Four eras. One guide to reliability, costs and what really matters.

Era Note

First-generation OM654 in the V-Class — smooth and torquey, but camshaft wear, timing chain issues and AdBlue faults are the main watchpoints.

GenerationYearsEngine CodeReliabilityRecon CostEra Note

W447 (V250d) BMW 320d W447 (V250d)

2014–2020OM654 (2.0 CDI — 190 bhp)★★★½☆ [NEWLY ASSIGNED — see Data Note]£3,000–£5,500 [MB‑QUOTE]First-generation OM654 in the V-Class — smooth and torquey, but camshaft wear, timing chain issues and AdBlue faults are the main watchpoints.

W447 (V250d) BMW 320d W447 (V250d)

2020–presentOM654 (2.0 CDI — 190 bhp)★★★★☆ [NEWLY ASSIGNED — see Data Note]£3,500–£6,500 [MB‑QUOTE]Facelift V250d — improved OM654 with 48V mild-hybrid; valvetrain wear and AdBlue system faults remain watchpoints.

W447 (V300d) BMW 320d W447 (V300d)

2020–presentOM654 (2.0 CDI — 237 bhp)★★★½☆ [NEWLY ASSIGNED — see Data Note]£4,000–£8,500 [MB‑QUOTE]The higher-output OM654 — 237 bhp, same engine architecture with higher boost and more emissions complexity.

Why use this era map?

Every cost guide, reliability rating and engine code on this page is aligned to the data above. This keeps everything consistent and trustworthy.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

Mercedes-Benz V250d / V300d Engine Replacement Costs

Supply Only£3,500–£6,500

Fitted (Indie)£4,500–£7,800

Warranty12–24 months

Best ForMost owners — best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£2,500–£4,500£3,300–£5,7003–6 monthsBudget priority; vehicle under £8,000

Reconditioned Engine£3,500–£6,500£4,500–£7,80012–24 monthsMost owners — best cost/warranty balance

Rebuilt Engine£5,000–£8,500£6,000–£9,80012–24 monthsLong‑term ownership; 3+ year horizon

Main Dealer New£10,000–£15,000£11,500–£17,00024–36 monthsInsurance jobs, warranty claims

Labour estimate: Fitting a V-Class diesel engine typically takes 12–16 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer). Engine Finders connects UK drivers with vetted specialists for reconditioned V-Class replacement engines. A reconditioned engine typically costs £1,200–£2,200, with total installed cost around £1,800–£2,800.

Common Problems

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Mercedes-Benz V250d / V300d — Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

Mercedes-Benz V250d / V300d — Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

Can It Be Repaired?

ProblemRepairable?Typical CostWhen It Makes SenseOM654 camshaft and tappet wear✅ Yes£1,500–£3,500If caught early; don't drive with ticking noiseOM654 timing chain wear✅ Yes£1,500–£4,000If caught early; recall may cover some modelsOM654 water pump failure✅ Yes£500–£1,200Preventative — replace at 60,000 milesOM654 AdBlue system failure✅ Yes£500–£1,500Replace NOx sensors, pump or injector; don't let countdown expireOM654 oil leaks (valve cover)✅ Yes£300–£800Replace gasket; common around valve coverFuel filter drainpipe recall (2022)✅ YesFreeCheck recall status — dealer will replace free of charge

Buying This V250d / V300d? Check These First

Buy If

Full Mercedes service history with documented oil changes (using MB 229.52 spec oil)
Post‑2020 facelift — generally more refined than the pre‑facelift
Evidence of water pump replacement — this is a key preventative item
No AdBlue system issues or evidence of NOx sensor replacement
Recall work completed (2022 fuel filter drainpipe recall)

Avoid If

Ticking or tapping noise from the top of the engine — potential valvetrain wear
Rattling on cold start — timing chain wear warning
AdBlue countdown active — potential system failure
Low coolant warnings with no diagnosis — water pump risk
Poor service history — the OM654 is sensitive to oil quality

Closing Verdict

The V250d / V300d's OM654 is Mercedes' most refined four-cylinder diesel — a smooth, torquey engine that delivers effortless performance in the premium MPV. Long‑term tests show it can exceed 350,000 km when properly maintained. However, it has known issues: camshaft and tappet wear, timing chain wear (subject to recall on some models), water pump failure, AdBlue system faults, and oil leaks. Buy on documented history and proof of preventative maintenance. If you're replacing, a reconditioned unit with a 12‑month warranty is the sweet spot.

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Buying Checklist

Before you buy a used Mercedes‑Benz V250d / V300d (or before you commit to an engine replacement), check these:

Cold Start — Listen for rattling noise on startup (timing chain wear warning — the most critical check)

Ticking Noise — Any tapping or ticking from the top of the engine? Valvetrain wear indicator

Service History — Including which engine era (OM654 is the only V250d/V300d engine — verify this before purchase) and oil change history (regular, high‑quality oil is essential)

Water Pump — Any history of water pump replacement? This is a known weak point

AdBlue System — Any AdBlue warnings? Countdown active? NOx sensor or pump failure

Oil Leaks — Check for oil spots under the car — valve cover gasket leaks are common

Recall Check — Has the 2022 fuel filter drainpipe recall been completed?

Engine Warning Light — Have codes been read? Any unresolved timing, AdBlue, or emissions issues?

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

Engine Codes

OM654 (V250d)

Years2014–present

Power190 bhp / 440 Nm

2025 Enquiries— (pattern data)

Avg. Recon Cost£3,000–£6,500 [MB‑QUOTE]

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

OM654 (V250d)2014–present190 bhp / 440 Nm— (pattern data)£3,000–£6,500 [MB‑QUOTE]

OM654 (V300d)2020–present237 bhp / 500 Nm— (pattern data)£4,000–£8,500 [MB‑QUOTE]

Technical Specs

OM654

Displacement1,950cc

Cylinders4‑cylinder inline

Compression Ratio15.5:1

Fuel SystemCommon‑rail direct injection (2,200 bar)

TurbochargerSingle variable geometry turbo (VGT)

EmissionsEuro 6d with AdBlue (SCR) and EGR

Oil SpecificationMB 229.52 / 229.71 (0W‑20)

Market Intelligence

Most Common Failure

OM654 valvetrain wear, timing chain wear, water pump failure and AdBlue system faults — approximately 55% of OM654 enquiries

Average Enquiry Mileage

55,000

miles

Average Replacement Cost

£4,500

reconditioned, supply only

[MB‑QUOTE]

Most Requested Engine Code

OM654

[MB‑VERIFIED]

Peak Enquiry Season

Winter — cold starts expose timing chain and valvetrain issues

Regional Demand

London25%

South East22%

South West14%

Regional Demand Breakdown

25%London

22%South East

Frequently Asked Questions

All prices are indicative UK market ranges based on historical quote data from our network of engine specialists. Actual costs vary by variant, engine code, damage severity and workshop location. Use our free comparison tool to get tailored quotes. Every engine supplied through EnginesMarket carries a minimum 12‑month unlimited‑mileage warranty — always confirm terms with your chosen supplier.

Find the best Mercedes‑Benz V250d / V300d engine replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and get back on the road with confidence.

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100% Free

No hidden fees

No Obligation

Get quotes with zero pressure

UK Specialists

20+ vetted experts

12-Month Warranty

As standard

Nationwide Delivery

Supply & fit available