GLA Diesel Engines
from £1,800 to £4,500
Rebuilt units from £2,200 · Common codes: OM651, OM654, OM608
Get quotes from trusted UK Mercedes GLA engine specialists. Compare reconditioned & used engines for GLA 180 to GLA 45 AMG - M270/M260/OM607 covered. Get a quote before it's too late.
GLA Diesel Engines
from £1,800 to £4,500
Rebuilt units from £2,200 · Common codes: OM651, OM654, OM608
GLA Petrol Engines
from £1,500 to £4,200
Rebuilt units from £1,800 · Common codes: M270, M260, M282
GLA AMG Performance Engines
from £4,500 to £12,000
Rebuilt units from £5,500 · Common codes: M133, M139

Most replacements completed within 3-5 days.
The table below shows typical UK rebuilt engine costs across Mercedes Benz GLA Class variants, covering documented failure causes, chassis generations, engine codes, and fuel types based on current market data.


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Not sure which variant your Mercedes Benz GLA Class is- Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.

Every engine code fitted to the Mercedes Benz GLA Class across all generations, with technical specs, compatible variants and trims, known failure points, and average rebuilt prices from UK specialists. Select any engine code to compare quotes.
Extracted from detailed diesel engine families across Mercedes Benz GLA Class variants.

OM651 DE22 LA (OM651.930) - 2.1L Diesel
Main replacement triggers are timing chain wear, EGR / cooling faults and turbo-control issues.
Compatible variants
Avg. rebuilt price
£1,800 - £4,500
Supply only
Technical specifications
Common failures
Not sure which engine code?
Can’t find your engine code- Enter your registration number above - we’ll instantly identify the exact unit, its technical specifications, and live replacement prices from UK Mercedes Benz GLA Class engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.

The Mercedes Benz GLA Class diesel range - particularly the OM651 2.1-litre fitted to 200 CDI and 220 CDI variants - dominates UK replacement enquiries, with timing chain stretch and injector carbon buildup the most frequently cited failures. Petrol GLA 200 and 250 owners search for M270 high-pressure pump and tensioner issues, while second-generation H247...
Mercedes Benz GLA Class OM651 Timing Chain Stretch
Most affected vehicles
Mercedes Benz GLA Class 200 CDI, 220 CDI, 220 CDI 4MATIC (2013-2019, OM651 DE22 LA)
Failure mileage range
80,000-120,000 miles
Typical failure window
Root cause
The OM651 uses a single timing chain located at the rear of the engine block, running from crank to camshafts via a secondary chain. Insufficient oil pressure during cold starts, combined with chain guide wear, leads to elongation of the primary chain. Once the tensioner exceeds its adjustment range, chain slap against the timing cover produces the characteristic rattle.
Repair options & estimated costs (UK ranges)
| Repair tier | Dealer price | Specialist price | What it involves | Longevity / suitability |
|---|---|---|---|---|
| Minor - Preventative Chain Replacement | £1,400 - £2,200 | £800 - £1,300 | Replace timing chain, tensioner, guides, and sprockets with upgraded components | 80,000-120,000 miles. Only viable if chain has not jumped teeth and guides are still intact |
| Intermediate - Cylinder Head Off | £3,000 - £4,500 | £1,800 - £2,800 | Chain replacement plus cylinder head removal to clear debris and inspect valves after timing slip | 60,000-80,000 miles. Required when engine has been run with audible chain rattle |
| Full Replacement - Rebuilt Engine | £5,500 - £7,500 | £3,500 - £5,500 | Supply & fit of rebuilt OM651 engine with upgraded timing components, new oil pump, injector seals, and full bench test | 100,000+ mile lifespan. The definitive solution when guides have failed or chain has snapped |
Our recommendation
If your GLA 220 CDI rattles only for 1-2 seconds on cold start, catch it early with a preventative chain replacement at a specialist - you'll save £2,000-£3,000 versus waiting for full engine failure. On a GLA worth £8,000-£15,000 with over 110,000 miles already, a rebuilt engine with upgraded timing components often delivers better long-term value than spending £1,800 on repairs that leave the rest of a high-mileage unit in place.
Compare rebuilt OM651 engine prices for your Mercedes Benz GLA Class
Every engine type for your Mercedes Benz GLA Class is available through our UK network, with typical price ranges varying by variant, engine code and your specific budget.
Compare Mercedes Benz GLA Class engine prices with vetted UK suppliers
All engine types include a minimum 12-month unlimited mileage warranty when sourced through EngineMarket. Prices are typical UK market ranges based on historical quote data from our network and depend on exact engine code, variant, mileage and supplier. Use our free comparison tool above - enter your registration to get tailored quotes for your specific Mercedes Benz GLA Class within hours.

Every displacement fitted to the Mercedes Benz GLA Class across all UK generations is listed below, with compatible engine codes, variants, years, and common failure notes to help you identify your exact unit.
The Renault-sourced OM608 1.5-litre diesel appeared in late X156-generation GLA models (2018-2020) as an entry-level efficiency option for buyers prioritising fuel economy over performance. Shared with the Renault K9K family, this unit was the smallest diesel ever fitted to the GLA Class and remains a rare but cost-effective replacement candidate for low-mileage urban cars.
Engine Code(s)
OM608
Compatible Models (UK)
GLA 180 d, GLA 180 d SE, GLA 180 d Urban
Power output
Verified by registration
Common Failure Points
Timing chain stretch from Renault-sourced design, EGR valve clogging on short journeys, injector seal failure
Production Years: X156, 2018-2020
Get quotes for Mercedes Benz GLA Class 1.5L diesel engines
Choose your Mercedes Benz GLA Class engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from early OM651 diesel to the latest M139 AMG petrol and plug-in hybrid.
Diesel engines dominated first-generation GLA sales, with the OM651 2.1-litre driving the vast majority of UK replacement enquiries - particularly on 220 CDI variants affected by timing chain stretch.
Common Mercedes Benz GLA Class Diesel Engine Families
Found In
Known For
Typical Diesel Models
Diesel engines dominated first-generation GLA sales, with the OM651 2.1-litre driving the vast majority of UK replacement enquiries - particularly on 220 CDI variants affected by timing chain stretch.
Common Mercedes Benz GLA Class Diesel Engine Families
Found In
Known For
Typical Diesel Models
Petrol-powered GLAs span two generations and five engine families, from entry-level 1.3-litre M282 units to the hand-built AMG M133 and M139 - with the M270 1.6L and 2.0L dominating first-generation replacement enquiries.
Common Mercedes Benz GLA Class Petrol Engine Families
Found In
Known For
Typical Petrol Models
The GLA 250 e combines the M282 1.3-litre turbo petrol engine with an electric motor and 15.6 kWh battery - offering approximately 37 miles of electric-only range, introduced exclusively on the H247 generation from 2020.
Mercedes Benz GLA Class PHEV Engine Codes
Found In
Important Notes
Not sure which fuel type your Mercedes Benz GLA Class has- Enter your registration number above to instantly identify your engine code, fuel system and compatible replacement options - all backed by a minimum 12-month unlimited mileage warranty from UK Mercedes Benz GLA Class specialists.

From the first-generation X156 (2013) to the current H247 (2020 onwards), this timeline maps every major engine change across the GLA Class so you can identify your exact unit and compare rebuilt prices from UK specialists.
⚙Key Changes
▣Main Engines
OM651DE22 LA - 2.1L diesel (GLA 200 CDI 136hp, GLA 220 CDI 170hp)
M270DE16 AL - 1.6L petrol (GLA 200, 156hp)
M270DE20 AL - 2.0L petrol (GLA 250, 211hp)
▰Popular Models
🔧Known For
Engine Codes Covered:
OM651M270