Mercedes-Benz CLA 180d / 200d Engine Replacement Compare Prices & Get Quotes

A replacement engine for a CLA 180d or 200d typically costs between £800 and £4,200 depending on the engine code and condition. Used OM607 units start from £800-£1,400, reconditioned from £1,500-£2,200, and fully rebuilt OM654 engines from £2,500-£4,200. Labour for supply & fit adds £450-£800.

• Used OM607 (CLA 180d): £800-£1,400
• Rebuilt OM651 (CLA 200d, 2013-2019): £2,000-£3,200
• Rebuilt OM654 (CLA 180d/200d, 2019-present): £2,500-£4,200

It depends on the engine and generation. The OM607 (CLA 180d, 2013-2019) uses a timing belt that must be replaced every 80,000-100,000 miles. The OM651 (CLA 200d, 2013-2019) uses a timing chain at the rear of the engine that is prone to stretching. The OM654 (CLA 180d/200d, 2019-present) uses a timing chain that is generally more robust.

• OM607: timing belt - replace every 80k-100k miles
• OM651: timing chain - rear-mounted, prone to stretch at 60k-100k miles
• OM654: timing chain - more durable, no scheduled replacement

On OM651-equipped CLA 200d models (C117, 2013-2019), the most common symptom is a rattling or clattering noise from the rear of the engine on cold start. Other signs include loss of power, rough idle, engine misfires, and the engine management light illuminating. If you hear any unusual sounds, have the timing system inspected immediately - ignoring the rattle can lead to catastrophic engine failure.

• Cold-start rattle from the rear of the engine
• Loss of power and rough running
• Engine management light activation

It depends on the generation and condition. A C117 CLA 180d or 200d is typically worth £4,000-£8,000 - a rebuilt engine (£1,800-£3,200) can be a worthwhile investment if the car is in good condition. A C118 CLA 180d or 200d is worth £10,000-£20,000 - a rebuilt OM654 engine (£2,500-£4,200) is usually well within the car's value. Always compare the cost of repair against the car's market value.

• C117 (2013-2019): rebuilt engine viable for good condition cars
• C118 (2019-present): rebuilt engine usually justifies cost
• Vehicle worth over £6,000: replacement usually justifies the cost

In the C117 generation (2013-2019), the CLA 180d uses the Renault-sourced OM607 1.5-litre diesel (109 hp, 260 Nm) with a timing belt, while the CLA 200d uses Mercedes' own OM651 2.1-litre diesel (136 hp, 300 Nm) with a rear-mounted timing chain. In the C118 generation (2019-present), both badges use the OM654 2.0-litre diesel, with the 180d producing 116 hp and the 200d producing 150 hp.

• C117 CLA 180d: 1.5L OM607, 109 hp, timing belt
• C117 CLA 200d: 2.1L OM651, 136 hp, rear timing chain
• C118 CLA 180d: 2.0L OM654, 116 hp, timing chain
• C118 CLA 200d: 2.0L OM654, 150 hp, timing chain

Power loss in the CLA 180d and 200d depends on the engine and generation. On OM651 engines, timing chain stretch can cause cam timing drift, reducing power. On OM607 and OM651, EGR valve clogging, DPF blockage, or turbocharger actuator failure are common culprits. On OM654 engines, NOx sensor failure can trigger limp mode. A diagnostic check with Mercedes STAR or compatible equipment is essential to identify the exact cause.

• Timing chain stretch (OM651) - power loss + rattling
• EGR valve / DPF clogging - common on all diesels
• NOx sensor failure (OM654) - limp mode and reduced power