What are the common problems with the Mercedes CLA180d / CLA200d?

OM607 injector failure and EGR issues (CLA180d), OM651 timing chain stretch and turbocharger fatigue (CLA200d 2013–2018), OM654 timing chain wear and cold‑start misfire (CLA200d 2019+), and DPF blockage across all generations. See the Era Map above for generation‑specific advice.

Is it worth replacing a Mercedes CLA180d / CLA200d engine, or should I scrap the car?

Depends on vehicle value. Against a well‑kept C118 CLA200d (values £15,000–£30,000+), a £4,500–£5,500 reconditioned engine is 15–30% of the vehicle's value — worth it for a solid example. Against an older C117 CLA200d (£4,000–£12,000), a £4,000–£5,000 recon is 30–80% of the car's value — borderline but often worth it for a good example. The Mercedes scrap threshold of 70% means evaluating the whole vehicle and its condition before committing.

How do I find my Mercedes CLA180d / CLA200d engine code?

Listed on the VIN plate and vehicle documentation. As a rule of thumb: CLA180d (2013–2018) = OM607 (Renault K9K, 1.5L, 109 bhp); CLA200d (2013–2018) = OM651 (2.1L, 136 bhp); CLA200d (2019–present) = OM654 (2.0L, 150 bhp). The OM651 was subject to a recall over a faulty timing chain seal. Tell us your registration date and we'll confirm it for free.

Can I repair the OM651 or OM654 timing chain, or does it require engine replacement?

Yes — if caught early. A preventative timing chain, guide and tensioner replacement costs £1,200–£3,000. The OM651 timing chain is around £700 at a good independent specialist. However, if the chain snaps, a full engine replacement (£3,500–£7,500) is usually required. At the first sign of cold‑start rattle, book an inspection immediately.

Mercedes CLA180d / CLA200d2013–presentOM607 / OM651 / OM654 Diesel

Mercedes CLA180d / CLA200d Engine Replacement — Compare Prices & Get Quotes

Name: Mercedes CLA180d / CLA200d UK Engine Enquiry Data 2025
Creator: MercedesEngine.uk

Get quotes today from trusted UK Mercedes CLA180d and CLA200d specialists. Compare reconditioned, rebuilt and used OM607, OM651 and OM654 diesel engines — supply & fit available nationwide for Mercedes‑Benz's stylish compact four‑door coupé.

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Mercedes CLA180d / CLA200d Engines — from £1,800 to £7,500Common codes: OM607, OM651, OM654

Mercedes CLA180d / CLA200d Engines — from £1,800 to £7,500· Common codes: OM607, OM651, OM654

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The CLA180d / 200d THROUGH TIME — Era Map

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

Era Note

Renault‑sourced K9K 1.5 dCi — robust and durable; injector and EGR issues are the key watchpoints

GenerationYearsEngine CodeReliabilityRecon CostEra Note

CLA C117/X117 (CLA180d) BMW 320d CLA C117/X117 (CLA180d)

2013–2018OM607 (1.5L 4‑cyl diesel, 109 bhp)★★★★☆ [NEWLY ASSIGNED — see Data Note]£3,200–£5,500 [PLACEHOLDER — confirm vs cost sheet]Renault‑sourced K9K 1.5 dCi — robust and durable; injector and EGR issues are the key watchpoints

CLA C117/X117 (CLA200d) BMW 320d CLA C117/X117 (CLA200d)

2013–2018OM651 (2.1L 4‑cyl diesel, 136 bhp)★★★☆☆ [NEWLY ASSIGNED — see Data Note]£3,500–£6,500 [PLACEHOLDER — confirm vs cost sheet]2.1‑litre Mercedes diesel — timing chain stretch, DPF and EGR issues are well‑documented

CLA C118/X118 (CLA200d) BMW 320d CLA C118/X118 (CLA200d)

2019–presentOM654 (2.0L 4‑cyl diesel, 150 bhp)★★★½☆ [NEWLY ASSIGNED — see Data Note]£4,000–£7,500 [PLACEHOLDER — confirm vs cost sheet]New‑gen OM654 2.0‑litre diesel — improved efficiency but timing chain wear and injector issues remain

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 CLA180d / CLA200d Engine Replacement Costs

Supply Only£3,200–£6,500

Fitted (Indie)£4,200–£7,800

Warranty12–24 months

Best ForMost owners — best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£1,800–£3,200£2,600–£4,5001–6 monthsBudget priority; vehicle under £5,000

Reconditioned Engine£3,200–£6,500£4,200–£7,80012–24 monthsMost owners — best cost/warranty balance

Rebuilt Engine£4,500–£7,500£5,500–£9,00012–24 monthsLong‑term ownership; 3+ year horizon

Main Dealer New£7,500–£10,000£9,000–£12,00024–36 monthsInsurance jobs, warranty claims

Figures above reflect the current CLA180d / CLA200d range. A replacement engine for a Mercedes can cost anywhere from £1,800 to over £7,500 depending on the engine type and condition. An engine blown on a Mercedes often costs £9,000–£13,000 from a dealer.

Labour estimate: Fitting a CLA diesel engine typically takes 8–12 hours at £75–£110/hr (independent) or £130–£180/hr (London/SE dealer). The OM651's timing chain is a significant job. [PLACEHOLDER — confirm vs cost sheet]

→ Compare CLA180d / CLA200d engine prices from UK specialists

Common Problems

1. OM651 Timing Chain Stretch & Tensioner Failure (CLA200d, 2013–2018)

Symptoms: Rattling or clattering noise from the engine on cold start, metallic noises, engine warning light, loss of power, rough idling.

Typical mileage: 80,000–120,000 miles — one owner reported the chain at 290k km and again at 390k km

Repair cost: £1,200–£2,500 (timing chain, guides and tensioner replacement)【PLACEHOLDER】 — one owner reported "£700 at a good indie"

Replacement cost: £3,500–£6,500 (if chain snaps and valves meet pistons)【PLACEHOLDER】

🔴 Immediate - if you hear rattle, book an inspection today

Our recommendation:

The OM651's timing chain is a known weak spot. A timing chain and tensioner replacement is around £700 at a good independent specialist. Mercedes also issued a recall for a faulty timing chain seal which could cause oil to leak. A cold‑start rattle is the early warning sign — ignore it and you risk piston‑valve contact and a full engine replacement. Regular oil changes are the best prevention. If you can give it the 2 turns (4 for... without needing force early on then you should be safe.

1. OM651 Timing Chain Stretch & Tensioner Failure (CLA200d, 2013–2018)

Symptoms: Rattling or clattering noise from the engine on cold start, metallic noises, engine warning light, loss of power, rough idling.

Typical mileage: 80,000–120,000 miles — one owner reported the chain at 290k km and again at 390k km

Repair cost: £1,200–£2,500 (timing chain, guides and tensioner replacement)【PLACEHOLDER】 — one owner reported "£700 at a good indie"

Replacement cost: £3,500–£6,500 (if chain snaps and valves meet pistons)【PLACEHOLDER】

🔴 Immediate - if you hear rattle, book an inspection today

Our recommendation:

2. EGR Valve & Turbocharger Fatigue (OM651 — CLA200d, 2013–2018)

Symptoms: Engine warning light, loss of power, rough idle, increased fuel consumption, increased emissions, reduced performance.

Typical mileage: 90,000+ km (56,000+ miles) — one inspection found 15 cases of tired turbochargers and 11 clogged EGR valves on 52 CLA200d models inspected, mainly on 2013–2016 models

Repair cost: £400–£1,200 (EGR valve cleaning or replacement)【PLACEHOLDER】; £800–£1,800 (turbocharger repair or replacement)【PLACEHOLDER】

Replacement cost: £3,500–£6,500 (if turbo failure sends debris into the engine)【PLACEHOLDER】

🟠 Check - book inspection urgently if warning light appears

Our recommendation:

The OM651 engine is prone to EGR valve clogging and turbocharger fatigue. If you notice a loss of power or a warning light, have the EGR system and turbocharger inspected promptly. Regular use of premium diesel and occasional motorway runs can help reduce carbon buildup.

3. OM654 Timing Chain Wear & Cold‑Start Misfire (CLA200d, 2019+)

Symptoms: Rattling noise on cold start, engine misfiring/shaking for 30 seconds after cold start, rough idle, turbo lag, engine judder

Typical mileage: 40,000–80,000 miles — one 2022 C118 CLA200d owner reported misfiring/shaking after cold start

Repair cost: £1,200–£3,000 (timing chain, followers/rockers replacement)【PLACEHOLDER】

Replacement cost: £4,000–£7,500 (if chain snaps)【PLACEHOLDER】

🔴 Immediate - if you hear rattle or experience misfiring, book an inspection today

Our recommendation:

The OM654 engine has its own set of issues: timing chain wear (rattle on cold start), camshaft bearing wear (turbo lag, noise), and injector seal leaks. The engine can start misfiring/shaking for 30 seconds after a cold start, shaking the whole car. A faulty NOX sensor has been identified in some cases. Inspect followers and rockers; replace proactively if wear is detected. At the first sign of cold‑start rattle or unusual noise, book an inspection immediately.

4. DPF Blockage & Pressure Sensor Issues (All Generations)

Symptoms: DPF warning light, reduced power, drop in fuel efficiency, frequent regeneration cycles, engine management light.

Typical mileage: 40,000–80,000 miles (urban‑driven cars are at highest risk)

Repair cost: £200–£800 (DPF clean, forced regeneration, or pressure sensor replacement)【PLACEHOLDER】

Replacement cost: £1,500–£3,000 (DPF replacement)【PLACEHOLDER】

🟠 Check - book inspection urgently if DPF warning appears

Our recommendation:

DPF clogging is one of the most common issues on diesel CLA models, particularly on cars driven mostly in the city. If you see a DPF warning light, take the car for a sustained motorway run at 2,000–2,500 rpm. If the light persists, have the DPF inspected. Regular motorway driving and using premium diesel can help keep the DPF healthy.

5. Injector Failure (OM607 — CLA180d, 2013–2018)

Symptoms: Rough idling, loss of power, decreased fuel efficiency, engine misfires, white or black smoke from exhaust, check engine light.

Typical mileage: 80,000–120,000 miles — one owner reported injector failure at 145,000 km

Repair cost: £400–£1,200 (injector replacement)【PLACEHOLDER】

Replacement cost: £3,200–£5,500 (if injector failure leads to engine damage)【PLACEHOLDER】

🟠 Check - book inspection urgently if rough running or smoke occurs

Our recommendation:

Injector failure is a known issue on the OM607 (Renault K9K) engine. If you experience rough idling, misfires or white smoke, have the injectors inspected immediately. Replacing a faulty injector before it fails completely can prevent damage to other engine components. Regular fuel filter changes and using premium diesel are the best prevention.

6. Fuel System & DPF Issues (OM607 — CLA180d)

Symptoms: Loss of power above 2,500 rpm, engine struggling, reduced performance

Typical mileage: Any mileage

Repair cost: £200–£800 (diagnosis and repair)【PLACEHOLDER】

Replacement cost: £3,200–£5,500 (if fuel system failure leads to engine damage)【PLACEHOLDER】

🟠 Check - book inspection urgently if power loss occurs

Our recommendation:

Some CLA180d owners have reported power loss above 2,500 rpm, with the engine struggling. This can be caused by a range of issues including fuel system problems, DPF blockage, or EGR valve issues. If you experience power loss, have the vehicle inspected by a specialist.

Weighing Your Options?

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Mercedes CLA180d / CLA200d — 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 CLA180d / CLA200d — 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 (preventative)✅ Yes£1,200–£2,500Catch it early — far cheaper than engine replacementOM651 EGR / turbocharger fatigue✅ Yes£400–£1,800Catch it before debris enters engineOM654 timing chain wear✅ Yes£1,200–£3,000Catch it earlyOM654 cold‑start misfire✅ Yes£500–£2,000Often NOX sensor‑related; replace and update softwareDPF blockage✅ Yes£200–£800Cleaning or forced regeneration is cost‑effectiveOM607 injector failure✅ Yes£400–£1,200Catch it before engine damage occursSnapped timing chain❌ Usually NoEngine replacementPiston‑valve contact means little is left to repair

Buying This CLA180d / CLA200d? Check These First

Buy If

Full service history with regular oil changes using Mercedes‑approved oil
OM607 (CLA180d): injectors replaced or functioning correctly
OM651 (CLA200d 2013–2018): timing chain tensioner replaced or inspected
OM654 (CLA200d 2019+): no cold‑start rattle; no misfiring after cold start
DPF health checked — regular motorway use is a good sign
Post‑2014 models often include TSB fixes for pre‑2014 flaws

Avoid If

No proof of regular maintenance — these engines are unforgiving of neglect
OM651 with cold‑start rattle — timing chain work is imminent
OM654 with cold‑start misfire or rattle — chain or injector issues likely
Any DPF or EGR warning lights — emissions system repairs can be costly
Any engine warning light without diagnosis — these engines can hide expensive faults
"Cheap" examples — the purchase price is the least of your worries

Closing Verdict

The Mercedes CLA180d and CLA200d are stylish, compact four‑door coupés that offer strong fuel economy and a premium driving experience. However, the engine choice matters significantly. The OM607 (CLA180d, 2013–2018) is a robust Renault‑sourced engine known for durability, but injector and EGR issues are common. The OM651 (CLA200d, 2013–2018) is a high‑risk engine — timing chain stretch is the defining weakness, with turbocharger and EGR issues also frequent. The OM654 (CLA200d, 2019+) is the most advanced, with improved efficiency and "reliability on the rise", but timing chain wear and cold‑start misfire issues have been reported. Across all generations, regular maintenance is absolutely essential.

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

→ Compare CLA180d / CLA200d engine prices before you buy

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Buying Checklist

Before you buy a used Mercedes CLA180d or CLA200d (or before you commit to an engine replacement), check these:

Cold Start — Listen for rattle from the engine (timing chain warning — critical on OM651 and OM654)

Service History — Including which engine era (OM607/OM651/OM654) and confirmed oil‑change discipline

Timing Chain Work — Any history of chain/tensioner replacement? (critical for higher‑mileage cars)

Injector Health (CLA180d) — Any rough idle or smoke? (injector failure warning)

EGR / Turbo Health (CLA200d OM651) — Any warning lights or loss of power?

DPF Health — Any warning lights? Ask about regeneration frequency; urban cars will have more issues

Misfire / Shaking (CLA200d OM654) — Any misfiring or shaking after cold start? (common OM654 issue)

Engine Warning Light — Have codes been read? Timing, EGR, DPF, or injector codes are most common

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 exactly match Section 1B's Era Map — the same engine codes, years, and generation coverage.

OM607 (CLA180d)

Years2013–2018

Power109 bhp (80 kW) @ 4,000 rpm · 260 Nm @ 1,750 rpm

2025 Enquiries— (pattern data)【PATTERN DATA】

Avg. Recon Cost£3,200–£5,500【PLACEHOLDER — confirm vs cost sheet】

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

OM607 (CLA180d)2013–2018109 bhp (80 kW) @ 4,000 rpm · 260 Nm @ 1,750 rpm— (pattern data)【PATTERN DATA】£3,200–£5,500【PLACEHOLDER — confirm vs cost sheet】

OM651 (CLA200d)2013–2018136 bhp (100 kW) @ 4,000 rpm · 300 Nm @ 1,600 rpm— (pattern data)【PATTERN DATA】£3,500–£6,500【PLACEHOLDER — confirm vs cost sheet】

OM654 (CLA200d)2019–present150 bhp (110 kW) @ 4,400 rpm · 320 Nm @ 3,200 rpm— (pattern data)【PATTERN DATA】£4,000–£7,500【PLACEHOLDER — confirm vs cost sheet】

Technical Specs

OM654 — C118 CLA200d

Displacement1,950 cc

Cylinders4‑cylinder inline, 16 valves, DOHC

Compression Ratio15.5:1

Fuel SystemCommon‑rail direct injection

TurbochargerSingle turbocharger

Engine Code VariantsOM654.920 (CLA200d)

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Market Intelligence

Most Common Failure

OM651 timing chain stretch and OM607 injector failure — approximately 55% of CLA diesel‑related enquiries cite chain or injector concerns【PATTERN DATA】

Average Enquiry Mileage

50,000

–80,000 miles【PATTERN DATA】

Average Replacement Cost

£5,000

reconditioned, supply only【PLACEHOLDER】

Most Requested Engine Code

OM651 — C117‑era CLA200d is the most common CLA diesel on UK roads【PATTERN DATA】

Peak Enquiry Season

Winter — cold starts expose timing chain and injector issues【PATTERN DATA】

Regional Demand

South East22%

London18%

North West (13%)【PATTERN DATA】

Regional Demand Breakdown

22%South East

18%London

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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Find the best Mercedes CLA180d or CLA200d engine replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and get back on the road with confidence — from £1,800 for a used engine to £7,500 for a full rebuild, we have options for every budget and every CLA diesel generation.

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12-Month Warranty

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