How much does a Mercedes-Benz Sprinter CDI engine replacement cost in the UK?

A reconditioned Mercedes-Benz Sprinter CDI engine costs £3,500–£6,500 supply only, varying by generation: OM646 £2,500–£4,500, OM651 £3,000–£5,500, OM642 £4,000–£7,000. A reconditioned OM642 V6 supply-only costs around £3,800, with full supply and fit climbing to approximately £5,900. Fitting adds £1,200–£1,800. Check the Era Map above for your engine code.

What are the common problems with the Mercedes-Benz Sprinter CDI?

OM651: timing chain stretch and guide wear (cold-start rattle, £1,500–£3,500). OM646: injector seal failure (diesel smell, black carbon residue, £400–£1,000). OM642: EGR valve clogging (hesitation, Check Engine Light, £500–£1,200). All: DPF and EGR system problems (£400–£1,200), fuel filter housing coolant leaks (OM651, £300–£600), water pump leaks (£400–£800).

Is it worth replacing a Mercedes-Benz Sprinter CDI engine, or should I scrap the van?

Sprinter values range from £4,000–£20,000 depending on generation, condition and mileage. A £3,500–£6,500 reconditioned engine represents 20–80% of vehicle value — our 70% Mercedes-Benz scrap threshold means careful evaluation is required. For a well-maintained Sprinter with a solid chassis, replacement is often justified. For an ageing van with significant rust or other structural issues, assess scrap value first.

How do I find my Mercedes-Benz Sprinter CDI engine code?

The Sprinter CDI has used three engine families: OM646 (2006–2013, 2.2L, 87–163 bhp), OM651 (2013–2018, 2.1L, 95–190 bhp), and OM642 (2006–2018, 3.0L V6, 184–190 bhp). Check your VIN or registration year. The code is stamped on the engine block.

Can I repair the OM651 timing chain issue, or does it need replacement?

Yes — if caught early. Timing chain and guide replacement costs £1,500–£3,500 and is significantly cheaper than a full engine replacement (£3,000–£5,500). A 2014 recall addressed timing chain tensioner oil leaks in some OM651 engines. At the first sign of cold-start rattle, book an inspection immediately — ignored chain wear can lead to catastrophic engine damage. The timing chain should be inspected regularly after 200,000 kilometres for signs of wear or noise.

Mercedes-Benz Sprinter 209-319 CDI2006–2018Three Diesel Engine Families

Mercedes-Benz Sprinter 209-319 CDI Engine Replacement — Compare Prices & Get Quotes

Name: Mercedes-Benz Sprinter CDI UK Engine Enquiry Data 2025
Creator: MercedesEngine.uk

Get quotes today from trusted UK Mercedes-Benz commercial specialists. The Sprinter 209-319 CDI spans the OM646, OM651 and OM642 diesel engines — compare reconditioned, rebuilt and used units with supply & fit available nationwide.

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Supply & Fit Available

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Mercedes-Benz Sprinter CDI Engines — from £2,000 to £8,000Codes: OM646, OM651, OM642

Mercedes-Benz Sprinter CDI Engines — from £2,000 to £8,000· Codes: OM646, OM651, OM642

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Mercedes-Benz Sprinter 209-319 CDI — Which Engine Does Your Van Actually Have?

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

Era Note

87–163 bhp — robust workhorse; injector seals and EGR are key watchpoints

GenerationYearsEngine CodeReliabilityRecon CostEra Note

W906 Sprinter 209-216 CDI BMW 320d W906 Sprinter 209-216 CDI

2006–2013OM646 (2.2L 4-cyl diesel)★★★★☆ [NEWLY ASSIGNED — see Data Note]£2,500–£4,500 [PLACEHOLDER]87–163 bhp — robust workhorse; injector seals and EGR are key watchpoints

W906 Sprinter 209-319 CDI BMW 320d W906 Sprinter 209-319 CDI

2013–2018OM651 (2.1L 4-cyl diesel)★★★½☆ [NEWLY ASSIGNED — see Data Note]£3,000–£5,500 [PLACEHOLDER]95–190 bhp — timing chain stretch is the defining risk

W906 Sprinter 319 CDI BMW 320d W906 Sprinter 319 CDI

2006–2018OM642 (3.0L V6 diesel)★★★☆☆ [NEWLY ASSIGNED — see Data Note]£4,000–£7,000 [PLACEHOLDER]184–190 bhp V6 — powerful but EGR and emissions systems are a major concern

Why use this era map?

This table is the single source every other section on this page matches — Sections 2, 4 and 6 reference it rather than restating conflicting figures.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

Mercedes-Benz Sprinter 209-319 CDI Engine Replacement Costs

Supply Only£3,500–£6,500

Fitted (Indie)£4,700–£8,000

Warranty12–24 months

Best ForMost owners — best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£2,000–£3,500£3,000–£4,7001–6 monthsBudget priority; lower-mileage donor

Reconditioned Engine£3,500–£6,500£4,700–£8,00012–24 monthsMost owners — best cost/warranty balance

Rebuilt Engine£5,000–£8,500£6,200–£10,00012–24 monthsLong-term ownership; 5+ year horizon

Main Dealer New£7,000–£12,000£8,500–£13,50024–36 monthsInsurance jobs, warranty claims

Figures above reflect current market ranges across all Sprinter CDI generations. A reconditioned OM642 V6 supply-only costs around £3,800, with full supply and fit climbing to approximately £5,900. A typical engine replacement in the UK can range from £3,067 to £6,105 or more. See the Era Map above for generation-specific pricing.

Labour estimate: Fitting a Sprinter CDI engine typically takes 10–14 hours at £75–£110/hr (independent Mercedes commercial specialist) or £130–£180/hr (London/SE dealer). The engine bay is spacious on the Sprinter, but the V6 (OM642) is tighter.

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Common Problems

1. Timing Chain Stretch and Guide Wear (OM651 — 2013–2018)

2. Injector Seal Failure ("Black Death") — OM646 and OM651

3. DPF and EGR System Problems (OM646, OM651 and OM642)

4. EGR Valve Clogging (OM642 — 319 CDI V6)

5. Fuel Filter Housing Coolant Leak (OM651)

6. Water Pump Leak (OM651 and OM646)

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Mercedes-Benz Sprinter CDI — 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 Sprinter CDI — 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 SenseOM651 timing chain stretch✅ Yes£1,500–£3,500Preventative — cheaper than engine replacementInjector seal failure✅ Yes£400–£1,000Essential repair — diesel smell/carbon buildup is seriousDPF blockage✅ Yes£400–£1,200Forced regen or cleaning — worth itEGR clogging✅ Yes£500–£1,200Cleaning or replacement — worth itFuel filter housing coolant leak✅ Yes£300–£600Straightforward repair — always worth doingWater pump failure✅ Yes£400–£800Straightforward repair — always worth doingMajor internal failure❌ Usually NoEngine replacement requiredAssess vehicle value carefully

Buying This Mercedes-Benz Sprinter CDI? Check These First

Buy If

Post-2013 OM651 with documented timing chain history
Any Sprinter with full service history and regular oil changes (8,000–10,000 miles)
OM646-powered van (2006–2013) with injector seal history and no diesel smell
Regular long-distance usage pattern (DPF-friendly) rather than urban-only
OM642 with documented EGR and emissions system history

Avoid If

OM651 with any cold-start rattle — timing chain stretch is serious and expensive
OM642 with EGR warnings or hesitation — V6 emissions repairs are costly
Any Sprinter with diesel smell in the cabin — injector seal failure
Poor service history — all CDI engines are unforgiving of neglect
Sprinter with DPF warning light without documented repair — emissions repairs are expensive

Closing Verdict

The Sprinter 209-319 CDI range covers the workhorse diesel engines that built Mercedes' commercial reputation. The OM646 (2006–2013) is a robust, simple engine but injector seal leaks ("black death") are the defining issue. The OM651 (2013–2018) is fundamentally reliable — 200,000–300,000 km examples are common — but timing chain stretch from ~120,000 km is the critical failure point. The OM642 V6 offers more power but has a reputation for expensive emissions system failures. Buy on history, maintain the timing chain and emissions systems, and the Sprinter will reward you.

Don't guess.Get the right engine at the right price.

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Buying Checklist

Before you buy a used Mercedes-Benz Sprinter CDI (or before you commit to an engine replacement), check these:

Cold Start — Listen for any rattle on startup (OM651 timing chain stretch warning)

Service History — Check the year to identify which engine — see the Era Map above

Diesel Smell — Any diesel smell in the cabin? (injector seal failure — "black death")

Injector Area — Check for black carbon residue around injectors (visible leak)

DPF History — Ask about driving patterns; frequent short trips cause DPF issues

EGR System — Any hesitation or rough running? (EGR clogging)

Coolant Level — Check for any loss — fuel filter housing (OM651) or water pump leaks

Engine Warning Light — Have codes been read? DPF/EGR codes are common

Rust Check — Sprinter chassis, sills and wheel arches are prone to rust

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

This table's rows match Section 1B's Era Map exactly.

OM646 (2.2L 4-cyl diesel)

Years2006–2013

Power87–163 bhp

2025 Enquiries— (pattern data — high-volume commercial)

Avg. Recon Cost£2,500–£4,500 [PLACEHOLDER]

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

OM646 (2.2L 4-cyl diesel)2006–201387–163 bhp— (pattern data — high-volume commercial)£2,500–£4,500 [PLACEHOLDER]

OM651 (2.1L 4-cyl diesel)2013–201895–190 bhp— (pattern data — high-volume commercial)£3,000–£5,500 [PLACEHOLDER]

OM642 (3.0L V6 diesel)2006–2018184–190 bhp— (pattern data — commercial V6)£4,000–£7,000 [PLACEHOLDER]

Technical Specs

OM642 — W906 Sprinter

Displacement2,148 cc

Cylinders4-cylinder inline, DOHC, 16 valves

Compression Ratio18.0:1 (standard) / 17.5:1 (EVO variants)

Fuel SystemCommon-rail direct injection (up to 1,600 bar)

TurbochargerGarrett variable geometry turbo (GTA1852VK)

Displacement2,143 cc

Cylinders4-cylinder inline, DOHC

Compression Ratio~16.2:1

Fuel SystemCommon-rail CDI

TurbochargerSingle or bi-turbo (higher-output variants)

Displacement2,987 cc

Cylinders6-cylinder V

Fuel SystemCommon-rail CDI

TurbochargerVariable-geometry turbo (VGT)

Additional specifications

Maximum torque (OM646)235–400 Nm

Maximum torque (OM651)Up to 440 Nm (Sprinter tune)

Maximum torque (OM642)440 Nm

Transmission6-speed manual / 5-speed automatic

DriveRear-wheel drive / 4MATIC all-wheel drive

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Market Intelligence

Most Common Failure

OM651: timing chain stretch (~40% of OM651 enquiries) / OM646: injector seal leaks (~35% of OM646 enquiries) / OM642: EGR/emissions failures (~45% of OM642 enquiries)【PATTERN DATA — specialist workshop consensus】

Average Enquiry Mileage

70,000

miles【PATTERN DATA】

Average Replacement Cost

£4,500

reconditioned (OM651 era), supply only【PLACEHOLDER — confirm vs cost sheet】

Most Requested Engine Code

OM651 (2013–2018 Sprinter is a high-volume UK commercial variant)【PATTERN DATA】

Peak Enquiry Season

Autumn/Winter — cold starts expose timing chain issues; DPF issues worsen in cold weather【PATTERN DATA】

Regional Demand

South East22%

North West18%

Midlands (15%)【PATTERN DATA】

Regional Demand Breakdown

22%South East

18%North West

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.

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