How much does a Mercedes‑Benz Citan W420 engine replacement cost in the UK?

A reconditioned W420 engine typically costs £1,800–£3,800 supply only, depending on engine — the M282 petrol sits at £1,800–£3,200, while the OM608 diesel commands £2,200–£3,800. Fitting adds £650–£1,500. Use our calculator for a personalised figure.

Which Mercedes‑Benz Citan W420 engine is the most reliable?

The M282 1.3‑litre turbo petrol is the most reliable in the range — it's a modern unit jointly developed by Renault‑Nissan‑Mitsubishi and Mercedes‑Benz, with a good track record and timing chain stretch as its only real watchpoint. The OM608 diesel is durable but injector and DPF issues are common on higher‑mileage vans.

What are the common problems with the Mercedes‑Benz Citan W420?

Injector failure and DPF clogging on the OM608 1.5‑litre diesel, and timing chain stretch on the M282 1.3‑litre petrol. The electric eCitan has its own considerations (battery health, charging infrastructure) but no combustion engine issues.

Is the Mercedes‑Benz Citan W420 reliable?

For a commercial van, yes — but maintenance is key. The OM608 diesel is proven but requires attention to injectors and DPF regeneration, particularly on urban‑use vans. The M282 petrol is simpler and has fewer complications. Regular servicing is non‑negotiable on both.

Which Mercedes‑Benz Citan W420 engine should I avoid?

The 75hp 108 CDI diesel is underpowered for the W420's size — avoid unless you're using it exclusively for light urban deliveries. Also be cautious with high‑mileage OM608 diesels without documented injector and DPF history.

How do I know if my Mercedes‑Benz Citan W420 engine needs replacing?

Rough idle or poor fuel economy (OM608 injector failure), DPF warning light (OM608 DPF clogging), cold‑start rattle (M282 timing chain), or major mechanical knock are the key warning signs. Use our diagnostic calculator for a personalised assessment.

Is it worth replacing a Mercedes‑Benz Citan W420 engine, or should I scrap the van?

Depends on the van's commercial value. A £2,200–£3,800 OM608 recon against a £10,000–£20,000 W420 is 11–38% — safe. Against a £6,000 high‑mileage example, the same recon reaches 37–63% — still under the 70% Mercedes‑Benz threshold, but borderline on higher‑mileage vans. Commercial use value may justify the spend.

How long do Mercedes‑Benz Citan W420 engines last?

The OM608 diesel can exceed 150,000 miles with proper servicing, though injectors and DPF are recurring maintenance items. The M282 petrol can comfortably reach 150,000+ miles with regular oil changes and timely chain attention. Electric battery health is the limiting factor on eCitan.

What is the difference between the W420 Citan and the Renault Kangoo?

Both share the CMF‑CD platform and are built at the same Renault Maubeuge plant. The W420 Citan uses Mercedes‑Benz badging, different front styling, and unique suspension tuning for a more car‑like ride. Engines are identical (Renault‑sourced), and parts are widely shared across the Alliance.

How do I find my Mercedes‑Benz Citan W420 engine code?

Listed on the VIN plate and vehicle documentation; block stamping is visible from below on most engines. Tell us your variant (108 CDI, 112 CDI, 110 petrol, 113 petrol) and we'll identify it — 25+ vetted Mercedes specialists will confirm it for free.

W420 Engine Replacement Cost UK

Mercedes‑Benz Citan W420 Engine Codes — The Complete Database

Every engine fitted to the Citan W420 specifically — spanning panel van and Tourer/MPV variants with diesel, petrol and electric powertrains.

Engine CodeFamilyFuelDisplacementPowerYears (W420)Variants (badges)Reliability2025 EnquiriesAvg. Recon Cost

OM608.915 (K9K)OM608Diesel, turbo1.5L (1461cc)75 hp (55 kW)2021–2026108 CDI★★★☆☆ [PROVISIONAL — pending dedicated Engine Page]— (pattern data)£2,200–£3,800 [MB‑QUOTE]

OM608.915 (K9K)OM608Diesel, turbo1.5L (1461cc)95 hp (70 kW)2021–2026110 CDI★★★☆☆ [PROVISIONAL — pending dedicated Engine Page]1,250 [MB‑VERIFIED]£2,200–£3,800 [MB‑QUOTE]

OM608.915 (K9K)OM608Diesel, turbo1.5L (1461cc)116 hp (85 kW)2021–2026112 CDI★★★☆☆ [PROVISIONAL — pending dedicated Engine Page]1,250 [MB‑VERIFIED]£2,200–£3,800 [MB‑QUOTE]

M282.914 (H5H)M282Petrol, turbo1.3L (1332cc)102 hp (75 kW)2021–2026110 (petrol)★★★★☆ [PROVISIONAL — pending dedicated Engine Page]— (pattern data)£1,800–£3,200 [MB‑QUOTE]

M282.914 (H5H)M282Petrol, turbo1.3L (1332cc)131 hp (96 kW)2021–2026113 (petrol)★★★★☆ [PROVISIONAL — pending dedicated Engine Page]— (pattern data)£1,800–£3,200 [MB‑QUOTE]

5AQ 60ElectricElectric—122 hp (90 kW)2023–2026eCitanN/A— (pattern data)N/A

Engine CodeFuelPowerYearsReliabilityEnquiriesAvg. Recon Cost

OM608.915 (K9K)OM608Diesel, turbo75 hp (55 kW)2021–2026★★★☆☆ [PROVISIONAL — pending dedicated Engine Page]— (pattern data)£2,200–£3,800 [MB‑QUOTE]

OM608.915 (K9K)OM608Diesel, turbo95 hp (70 kW)2021–2026★★★☆☆ [PROVISIONAL — pending dedicated Engine Page]1,250 [MB‑VERIFIED]£2,200–£3,800 [MB‑QUOTE]

OM608.915 (K9K)OM608Diesel, turbo116 hp (85 kW)2021–2026★★★☆☆ [PROVISIONAL — pending dedicated Engine Page]1,250 [MB‑VERIFIED]£2,200–£3,800 [MB‑QUOTE]

M282.914 (H5H)M282Petrol, turbo102 hp (75 kW)2021–2026★★★★☆ [PROVISIONAL — pending dedicated Engine Page]— (pattern data)£1,800–£3,200 [MB‑QUOTE]

M282.914 (H5H)M282Petrol, turbo131 hp (96 kW)2021–2026★★★★☆ [PROVISIONAL — pending dedicated Engine Page]— (pattern data)£1,800–£3,200 [MB‑QUOTE]

5AQ 60ElectricElectric122 hp (90 kW)2023–2026N/A— (pattern data)N/A

Overview

Mercedes‑Benz Citan W420 — Overview

The W420 is the second generation of the Mercedes‑Benz Citan, introduced in August 2021 as the successor to the W415.

It is a badge‑engineered variant of the third‑generation Renault Kangoo, sharing the CMF‑CD platform and built alongside the Kangoo and Nissan Townstar at the Renault Maubeuge plant in France. The W420 is available in panel van and Tourer/MPV body styles, with the passenger variant also sold as the T‑Class from 2022. The engine line‑up consists of Renault‑sourced 1.5‑litre diesel and 1.3‑litre petrol four‑cylinders, with an electric eCitan variant introduced in 2023.

Key Facts

Platform

Renault‑Nissan CMF‑CD

Predecessor

W415

Successor

None (production ends 2026)

Sibling models

Renault Kangoo III, Nissan Townstar

Market Intelligence

The Citan range (W415/W420 combined) generated real UK engine enquiries in 2025 [MB‑VERIFIED], with the OM608 diesel and M282 petrol commanding the strongest specialist interest.

Mercedes‑Benz Citan W420 — Overview

The W420 is the second generation of the Mercedes‑Benz Citan, introduced in August 2021 as the successor to the W415.

It is a badge‑engineered variant of the third‑generation Renault Kangoo, sharing the CMF‑CD platform and built alongside the Kangoo and Nissan Townstar at the Renault Maubeuge plant in France. The W420 is available in panel van and Tourer/MPV body styles, with the passenger variant also sold as the T‑Class from 2022. The engine line‑up consists of Renault‑sourced 1.5‑litre diesel and 1.3‑litre petrol four‑cylinders, with an electric eCitan variant introduced in 2023.

Key Facts

Platform

Renault‑Nissan CMF‑CD

Predecessor

W415

Successor

None (production ends 2026)

Sibling models

Renault Kangoo III, Nissan Townstar

Market Intelligence

The Citan range (W415/W420 combined) generated real UK engine enquiries in 2025 [MB‑VERIFIED], with the OM608 diesel and M282 petrol commanding the strongest specialist interest.

Best & Worst Engines

Best Diesel Overall

OM608.915 1.5‑litre diesel (112 CDI, 116hp)

“The highest‑output 1.5 dCi diesel delivers 116hp and 260Nm of torque — ample for the W420's van and MPV duties. It's the most refined diesel in the range, with a proven track record across the Renault‑Nissan‑Mercedes Alliance. Injector and turbo maintenance are the main watchpoints.”

Who it's for: buyers who want maximum diesel performance from the W420 range.

Best Petrol Overall

M282.914 1.3‑litre turbo (113, 131hp)

“The 1.3‑litre turbo petrol delivers 131hp and 240Nm — genuinely brisk for a compact van. Jointly developed by Renault‑Nissan‑Mitsubishi and Mercedes‑Benz, it's a thoroughly modern engine with good refinement and proven reliability. Timing chain maintenance is the only real demand.”

Who it's for: buyers who want petrol refinement without the diesel's DPF complications.

Highest Risk

OM608.915 1.5‑litre diesel (108 CDI, 75hp)

“The lowest‑output diesel is underpowered for the W420's size — 75hp struggles with a full load. Injector and turbo issues are documented on higher‑mileage examples, and the DPF can clog on urban‑only vans.”

Who it's for: buyers on a tight budget who prioritise fuel economy over performance.

Most Expensive Failure

OM608.915 1.5‑litre diesel (injector/turbo failure)

“The Renault‑sourced 1.5 dCi is generally robust but injector and turbo failures are documented on higher‑mileage examples. A full recon is a significant four‑figure bill, and DPF issues add to the running costs.”

Who it's for: buyers who understand diesel maintenance costs and are prepared for potential injector or turbo work.

Best Value

M282.914 1.3‑litre turbo (110, 102hp)

“The entry‑level petrol turbo delivers 102hp — more than enough for urban and light commercial use. It avoids the diesel's DPF complications and offers lower running costs than the higher‑output 113. The M282 is a well‑proven unit across the Alliance.”

Who it's for: buyers who want petrol simplicity without the diesel's complexities.

Most Overlooked

OM608.915 1.5‑litre diesel (110 CDI, 95hp)

“The mid‑range diesel is often overlooked in favour of the 116hp 112 CDI — but 95hp and 260Nm deliver solid real‑world performance for most W420 duties, with slightly lower purchase costs than the top‑spec diesel.”

Who it's for: buyers who want diesel torque without paying for the highest‑output variant.

Best Diesel Overall

OM608.915 1.5‑litre diesel (112 CDI, 116hp)

“The highest‑output 1.5 dCi diesel delivers 116hp and 260Nm of torque — ample for the W420's van and MPV duties. It's the most refined diesel in the range, with a proven track record across the Renault‑Nissan‑Mercedes Alliance. Injector and turbo maintenance are the main watchpoints.”

Who it's for: buyers who want maximum diesel performance from the W420 range.

Best Petrol Overall

M282.914 1.3‑litre turbo (113, 131hp)

“The 1.3‑litre turbo petrol delivers 131hp and 240Nm — genuinely brisk for a compact van. Jointly developed by Renault‑Nissan‑Mitsubishi and Mercedes‑Benz, it's a thoroughly modern engine with good refinement and proven reliability. Timing chain maintenance is the only real demand.”

Who it's for: buyers who want petrol refinement without the diesel's DPF complications.

Highest Risk

OM608.915 1.5‑litre diesel (108 CDI, 75hp)

“The lowest‑output diesel is underpowered for the W420's size — 75hp struggles with a full load. Injector and turbo issues are documented on higher‑mileage examples, and the DPF can clog on urban‑only vans.”

Who it's for: buyers on a tight budget who prioritise fuel economy over performance.

Most Expensive Failure

OM608.915 1.5‑litre diesel (injector/turbo failure)

“The Renault‑sourced 1.5 dCi is generally robust but injector and turbo failures are documented on higher‑mileage examples. A full recon is a significant four‑figure bill, and DPF issues add to the running costs.”

Who it's for: buyers who understand diesel maintenance costs and are prepared for potential injector or turbo work.

Best Value

M282.914 1.3‑litre turbo (110, 102hp)

“The entry‑level petrol turbo delivers 102hp — more than enough for urban and light commercial use. It avoids the diesel's DPF complications and offers lower running costs than the higher‑output 113. The M282 is a well‑proven unit across the Alliance.”

Who it's for: buyers who want petrol simplicity without the diesel's complexities.

Most Overlooked

OM608.915 1.5‑litre diesel (110 CDI, 95hp)

“The mid‑range diesel is often overlooked in favour of the 116hp 112 CDI — but 95hp and 260Nm deliver solid real‑world performance for most W420 duties, with slightly lower purchase costs than the top‑spec diesel.”

Who it's for: buyers who want diesel torque without paying for the highest‑output variant.

Mercedes‑Benz Citan W420 — Ownership Economics

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

OM608.915 (75hp)60k–100kInjector failure, turbo wear£500–£1,200£2,200–£3,800

Entry Diesel — underpowered but economical

OM608.915 (95hp)60k–100kInjector failure, turbo wear£500–£1,200£2,200–£3,800

Mid‑Range Diesel — solid performance

OM608.915 (116hp)60k–100kInjector failure, turbo wear£500–£1,200£2,200–£3,800

Best Diesel — most powerful, same costs

M282.914 (102hp)50k–90kTiming chain stretch£600–£1,200£1,800–£3,200

Entry Petrol — simple and reliable

M282.914 (131hp)50k–90kTiming chain stretch£600–£1,200£1,800–£3,200

Best Petrol — more power, same engine

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

OM608.915 (75hp)60k–100kInjector failure, turbo wear£500–£1,200£2,200–£3,800

Entry Diesel — underpowered but economical

OM608.915 (95hp)60k–100kInjector failure, turbo wear£500–£1,200£2,200–£3,800

Mid‑Range Diesel — solid performance

OM608.915 (116hp)60k–100kInjector failure, turbo wear£500–£1,200£2,200–£3,800

Best Diesel — most powerful, same costs

M282.914 (102hp)50k–90kTiming chain stretch£600–£1,200£1,800–£3,200

Entry Petrol — simple and reliable

M282.914 (131hp)50k–90kTiming chain stretch£600–£1,200£1,800–£3,200

Best Petrol — more power, same engine

The W420 rule

A £2,200–£3,800 OM608 recon against a £10,000–£20,000 W420 sits at 11–38% of the car's value — well inside the 70% Mercedes‑Benz threshold. Against a £8,000 high‑mileage example, the same recon reaches 28–48% — still viable, but a significant proportion of the van's residual value. Value the van and its service history first.

Common Problems

01

OM608

1.5 dCi Injector Failure

Affected models:

W420 108 CDI, 110 CDI, 112 CDI (all OM608.915).

Typical failure mileage:

60,000–100,000 miles.

Root cause:

The 1.5 dCi's injectors can fail, causing rough running, poor fuel economy, and potential engine damage if ignored — this is a well‑documented issue across the Renault‑Nissan‑Mercedes Alliance.

Tiered Cost Table

Our Recommendation

A £500–£1,200 injector service is dramatically cheaper than the £2,200–£3,800 replacement that follows if ignored — address it proactively.

Compare OM608 engine prices for your W420

02

OM608

DPF Clogging

Affected models:

W420 108 CDI, 110 CDI, 112 CDI (urban‑use examples).

Typical failure mileage:

50,000–80,000 miles.

Root cause:

The diesel particulate filter (DPF) can clog on vans used primarily for urban driving — short journeys prevent the DPF from completing regeneration cycles.

Tiered Cost Table

Our Recommendation

On a W420 used for urban delivery work, a £300–£800 DPF service is non‑negotiable — ignore it and the van won't restart.

Compare DPF service prices for your W420

03

M282

1.3 Turbo Timing Chain Stretch

Affected models:

W420 110, 113 (all M282.914 petrol).

Typical failure mileage:

50,000–90,000 miles.

Root cause:

The 1.3‑litre turbo's timing chain can stretch over time, particularly on engines with extended service intervals — a rattle on cold start is the classic early warning.

Tiered Cost Table

Our Recommendation

At the first sign of cold‑start rattle, get the chain inspected immediately — a £600–£1,200 preventative repair is far cheaper than the £2,000–£3,500 replacement that follows if ignored.

Compare M282 engine prices for your W420

W420 Engine Replacement Costs — By Engine and Condition

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

108 CDI (75hp)OM608.915£1,200–£2,200£2,200–£3,800£3,500–£5,5008–12 hrs

110 CDI (95hp)OM608.915£1,200–£2,200£2,200–£3,800£3,500–£5,5008–12 hrs

112 CDI (116hp)OM608.915£1,200–£2,200£2,200–£3,800£3,500–£5,5008–12 hrs

110 (102hp petrol)M282.914£1,000–£1,800£1,800–£3,200£2,800–£4,5008–12 hrs

113 (131hp petrol)M282.914£1,000–£1,800£1,800–£3,200£2,800–£4,5008–12 hrs

eCitan (electric)5AQ 60N/AN/AN/AN/A

Core Variants

Diesel Variants

108 CDI110 CDI112 CDI

Petrol Variants

110113

Scope note: All variants listed are W420 Citan (2021–2026) only. Pre‑facelift W415 Citan (2012–2021) is covered on its own Generation Page. The T‑Class passenger variant shares the same engine line‑up.

Core Variants

Diesel Variants

108 CDI110 CDI112 CDI

Petrol Variants

110113

Scope note: All variants listed are W420 Citan (2021–2026) only. Pre‑facelift W415 Citan (2012–2021) is covered on its own Generation Page. The T‑Class passenger variant shares the same engine line‑up.

Market Intelligence

Most Requested E90 Engines (2025)

Most Requested E90 Variants

Average E90 Replacement Cost

Most Common E90 Failures

FAQ

BMW 3 Series E90 rear three-quarter view

Why UK Mercedes‑Benz Citan W420 Owners Trust MercedesEngines.uk

Trusted W420 Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real W420 owners, as part of the Engine Finders network.
Compare W420 Engine Replacement Companies
see prices, warranty terms and supply‑and‑fit options side‑by‑side before you commit.
UK Engine Replacement Services for W420
covering every variant from 108 CDI to 113 petrol, with supply‑only or full supply‑and‑fit available nationwide.

Find the best Mercedes‑Benz Citan W420 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‑Benz Citan W420 Engine Prices on EnginesMarket

Why UK Mercedes‑Benz Citan W420 Owners Trust MercedesEngines.uk

Trusted W420 Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real W420 owners, as part of the Engine Finders network.
Compare W420 Engine Replacement Companies
see prices, warranty terms and supply‑and‑fit options side‑by‑side before you commit.
UK Engine Replacement Services for W420
covering every variant from 108 CDI to 113 petrol, with supply‑only or full supply‑and‑fit available nationwide.

Find the best Mercedes‑Benz Citan W420 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‑Benz Citan W420 Engine Prices on EnginesMarket

Mercedes‑Benz Citan W420 Engines — The Complete UK Guide

Mercedes‑Benz Citan W420 Engine Codes — The Complete Database

Mercedes‑Benz Citan W420 — Overview

Mercedes‑Benz Citan W420 — Overview

Best & Worst Engines

Mercedes‑Benz Citan W420 — Ownership Economics

Common Problems

W420 Engine Replacement Costs — By Engine and Condition

Core Variants

Core Variants

Market Intelligence

FAQ

Why UK Mercedes‑Benz Citan W420 Owners Trust MercedesEngines.uk

Why UK Mercedes‑Benz Citan W420 Owners Trust MercedesEngines.uk