Mercedes-Benz A-Class 180d Engine Replacement Compare Prices & Get Quotes

A replacement engine for an A180d typically costs between £600 and £5,000 depending on the engine code and condition. Used OM607 units start from £600-£1,500, reconditioned from £1,800-£3,200, and fully rebuilt OM654 engines from £2,800-£5,000. Labour for supply & fit adds £400-£800.

• Used OM607 (W176, 2014-2018): £600-£1,500
• Rebuilt OM608 (W177, 2018-2020): £2,400-£4,000
• Rebuilt OM654 (W177, 2020-present): £2,800-£5,000

It depends on the engine. The OM607 (W176 facelift, 2014-2018) and OM608 (W177, 2018-2020) are Renault-sourced 1.5-litre engines with a timing belt that must be replaced every 80,000-100,000 miles. The OM654 (W177, 2020-present) is Mercedes' own 2.0-litre engine with a timing chain. Enter your registration above to confirm which engine is fitted to your car.

• OM607/OM608: timing belt - replace every 80k-100k miles
• OM654: timing chain - more durable, no scheduled replacement
• Belt failure is catastrophic - do not exceed the interval

It depends on the generation and condition. A W176 A180d is typically worth £4,000-£10,000 - a rebuilt OM607 engine (£2,200-£3,800) can be a worthwhile investment if the car is in good condition. A W177 A180d is worth £8,000-£18,000 - a rebuilt OM654 engine (£2,800-£5,000) is usually well within the car's value. Always compare the cost of repair against the car's market value.

• W176 (2014-2018): rebuilt engine viable for good condition cars
• W177 (2018-2020): rebuilt OM608 engine viable
• W177 (2020-present): rebuilt OM654 engine usually justifies cost

The OM607 and OM608 (Renault-sourced 1.5-litre) are capable of high mileage, but their timing belts must be replaced every 80,000-100,000 miles - failure to do so is catastrophic. The OM654 (Mercedes 2.0-litre) is more robust and can exceed 200,000+ miles with proper maintenance. Regular oil changes (every 10,000 miles) and timely replacement of wear items are key to maximising engine life.

• OM607/OM608: high-mileage capable with regular belt changes
• OM654: 200,000+ miles achievable
• Regular maintenance is essential for all variants

The OM607 is a 1.5-litre Renault K9K-sourced diesel used in the W176 A180d facelift (2014-2018), producing 109 hp with a timing belt. The OM608 is an updated 1.5-litre version used in the early W177 A180d (2018-2020), producing 116 hp (+7 hp) with the same timing belt architecture. The OM654 is Mercedes' own 2.0-litre diesel introduced in late 2020, producing 116 hp but with a timing chain and 20 Nm more torque.

• OM607: 1.5L, 109 hp, timing belt, W176 (2014-2018)
• OM608: 1.5L, 116 hp, timing belt, W177 (2018-2020)
• OM654: 2.0L, 116 hp, timing chain, W177 (2020-present), +20 Nm torque

The AdBlue system on A180d models (all engines) can fail due to crystallisation in the dosing injector, a failed heater element in the AdBlue tank, or degraded NOx sensors. The ECU responds with a "No Start in XXX miles" countdown when AdBlue dosing is compromised. These faults are common on 2016-2019 models and can be expensive to repair at main dealers.

• AdBlue heater failure - common on 2018-2020 models
• NOx sensor degradation - sensors have a limited service life
• Countdown warning - do not ignore; seek specialist diagnosis