Mercedes-Benz A-Class A180 CDI Engine Replacement — Compare Prices & Get Quotes
Get quotes today from trusted UK Mercedes-Benz A180 CDI specialists. Compare reconditioned, rebuilt and used 2.0-litre turbo-diesel engines — OM640 and OM651 variants across the W169 and W176 generations — supply & fit available nationwide.
The A180 CDI THROUGH TIME — Era Map
Four generations. Four eras. One guide to reliability, costs and what really matters.
Era Note
2.0L common-rail diesel — 109 bhp, 250 Nm; timing chain tensioner and injector issues are the primary concerns
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.
Mercedes-Benz A-Class A180 CDI Engine Replacement Costs
Figures above reflect current A180 CDI replacement costs. The OM651 variant typically sits at the higher end of the range. See the Era Map above for generation-specific pricing.
Labour estimate: Fitting an A180 CDI engine typically takes 10–14 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer).
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A-Class A180 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?
Buying This A180 CDI? Check These First
Buy If
- OM640-engined W169 (2004–2012) with documented maintenance history
- OM651-engined W176 with timing chain tensioner replaced or inspected
- OM607-engined W176 with turbocharger history (and still under warranty)
- Full service history with regular oil changes (critical for chain longevity)
- Evidence of regular longer runs (DPF health)
Avoid If
- OM651 with cold-start rattle and no chain history — assume it's overdue
- OM607 with turbocharger issues or no history — turbo failure is common
- No service history — all A180 CDI engines are sensitive to oil quality
- Short-journey ownership history — DPF and EGR issues likely
- Engine warning light with no diagnosis — may indicate timing, injector or turbo problems
Closing Verdict
The A180 CDI is Mercedes-Benz's entry-level diesel hatchback — a 2.0-litre (W169) or 1.5/2.1-litre (W176) turbo-diesel that offers excellent fuel economy and a premium driving experience. The OM640 in the W169 is generally more straightforward, while the OM651 in the W176 has timing chain vulnerabilities that are expensive to address. The OM607 (Renault K9K) has turbocharger and injector issues. With typical A-Class values ranging from £3,000 (W169) to £12,000+ (W176), an engine replacement is a significant investment — a well-maintained W169 OM640 or a W176 with documented timing chain work is the safest choice.
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Buying Checklist
Before you buy a used Mercedes-Benz A-Class A180 CDI (or before you commit to an engine replacement), check these:
Cold Start — Listen for rattling (timing chain tensioner warning — OM651) — see the map above
Service History — Including which engine era (OM640, OM607 or OM651) and oil-change discipline
Timing Chain — For OM651 (W176): check for any chain work or cold-start rattle
Injector Health — Check for smooth idle; any lumpiness may indicate injector issues
Turbo Health — Test acceleration; any lag, whistling, or hesitation? (OM607 particularly)
DPF Regeneration — Check history; short journeys accelerate wear on all diesel eras
Engine Warning Light — Have codes read; unresolved issues may indicate timing, injector or turbo problems
MOT History — Check for emissions-related failures
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.
OM640.940 / OM640.941
Technical Specs
OM640.940 — W169 generation→ Compare A180 CDI engine prices for your A-Class
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Market Intelligence
Most Common Failure
Timing chain tensioner wear (OM651) and injector issues (OM651 & OM607) — the most frequent A180 CDI enquiries
Average Enquiry Mileage
60,000
–90,000 miles
[PATTERN DATA]
Average Replacement Cost
£4,000
–£4,500 reconditioned, supply only
[PLACEHOLDER]
Most Requested Engine Code
OM651 / OM640
[PATTERN DATA]
Peak Enquiry Season
Winter — cold starts expose timing chain wear
[PATTERN DATA]
Regional Demand
PATTERN DATA
Regional Demand Breakdown
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 condition, 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.
Why UK Mercedes-Benz A180 CDI Owners Trust MercedesEngine.uk
Trusted A180 CDI Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real A180 CDI owners, as part of the Engine Finders network, across every generation — OM640, OM607 and OM651 — covering the W169 and W176 chassis.
Compare A180 CDI Engine Replacement Companies
see prices, warranty terms and supply & fit options side-by-side before you commit. We cover the 2.0-litre and 1.5/2.1-litre turbo-diesels specifically, with specialists who understand the OM651 timing chain vulnerabilities, injector issues, and the unique requirements of the A-Class.
UK Engine Replacement Services for A180 CDI
supply-only or full supply & fit available nationwide, covering every generation of this badge since 2004, with a 12-month warranty as standard across our network.
Find the best Mercedes-Benz A180 CDI engine replacement UK owners rely on. Compare prices from trusted specialists on EnginesMarket today and get your A-Class back on the road with confidence.
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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