Mercedes-Benz CLA 220d Engine Replacement Compare Prices & Get Quotes

A replacement engine for a CLA 220d typically costs between £1,200 and £4,200 depending on the engine code and condition. Used N47D20C units start from £1,200-£2,200, reconditioned from £2,200-£3,200, and fully rebuilt OM654 engines from £2,800-£4,200. Labour for supply & fit adds £450-£800.

• Used N47D20C (C117 CLA 220d, 2015-2019): £1,200-£2,200
• Rebuilt N47D20C: £2,500-£3,800
• Rebuilt OM654.920 (C118 CLA 220d, 2019-present): £2,800-£4,200

On N47D20C-equipped CLA 220d models (C117, 2015-2019), the most common symptom is a rattling or metallic noise from the rear of the engine, particularly at 2,500-3,000 rpm. 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.

• Rattling noise from the rear of the engine
• Loss of power and rough running
• Engine management light activation

It depends on the engine and generation. The N47D20C (CLA 220d, C117, 2015-2019) uses a timing chain positioned at the rear of the engine - a design that makes replacement labour-intensive. The OM654.920 (CLA 220d, C118, 2019-present) also uses a timing chain, which is generally more robust but can suffer from tensioner wear.

• N47D20C: timing chain - rear-mounted, prone to stretch at 60k-100k miles
• OM654: timing chain - more durable, but injector and turbo issues are the main concerns

It depends on the generation and condition. A C117 CLA 220d is typically worth £4,000-£8,000 - a rebuilt N47D20C engine (£2,500-£3,800) can be a worthwhile investment if the car is in good condition. A C118 CLA 220d is worth £10,000-£25,000 - a rebuilt OM654 engine (£2,800-£4,200) is usually well within the car's value. Always compare the cost of repair against the car's market value.

• C117 (2015-2019): rebuilt N47D20C viable for good condition cars
• C118 (2019-present): rebuilt OM654 usually justifies cost
• Vehicle worth over £6,000: replacement usually justifies the cost

The N47D20C is a BMW-sourced 2.0-litre diesel used in the C117 CLA 220d (2015-2019), producing 177 hp with a rear-mounted timing chain. The OM654.920 is Mercedes' own 2.0-litre modular diesel used in the C118 CLA 220d (2019-present), producing 190 hp and 400 Nm torque. The N47D20C is notorious for timing chain failure, while the OM654 has injector seal, HPFP, and turbo issues.

• N47D20C: 2.0L, 177 hp, rear timing chain, BMW-sourced, C117 (2015-2019)
• OM654.920: 2.0L, 190 hp, 400 Nm, Mercedes-designed, C118 (2019-present)

Power loss in the CLA 220d depends on the engine and generation. On N47D20C engines, timing chain stretch can cause cam timing drift, reducing power. On OM654 engines, turbocharger failure, HPFP failure, or NOx sensor issues are common culprits. A diagnostic check with Mercedes STAR or compatible equipment is essential to identify the exact cause.

• Timing chain stretch (N47D20C) - power loss + rattling
• Turbocharger failure (OM654) - reduced power, odd noises
• HPFP failure (OM654) - misfires and poor acceleration