BMW 5 Series M550d Engine Replacement Compare Prices & Get Quotes

A BMW M550d engine replacement is a significant investment due to the complex tri-turbo or quad-turbo setup. For the N57D30C (F10/F11, 2012-2016), rebuilt units range from £5,500-£8,000. For the B57D30S0 (G30/G31, 2017-2023), expect £6,000-£8,500. Labour for supply and fit adds approximately £1,300-£2,000 (20-30 hours at independent specialist rates) due to the engine's complexity.

• Used engine: £2,500-£4,500 depending on code
• Reconditioned: £4,500-£7,500
• Rebuilt: £5,500-£8,500
• Supply & fit: add £1,300-£2,000 in labour

Yes - but it depends on the generation. The N57S engine (F10/F11, 2012-2016) suffers from the same rear-positioned timing chain issues as the N47, with chain stretch and tensioner failure possible between 80,000-120,000 miles. The B57S engine (G30/G31, 2017-2023) is significantly more robust, with timing chain stretch and guide failures being exceedingly rare.

• N57S: timing chain is a known weak point
• B57S: timing chain issues are rare
• Cold-start rattle is the first warning sign on N57S

It depends on the generation and the car's value. A typical F10/F11 M550d (2012-2016) is worth £12,000-£25,000, making a £5,500-£8,000 replacement a significant but often viable investment for well-maintained examples. A G30/G31 M550d (2017-2023) is worth £25,000-£45,000, making a £6,000-£8,500 replacement easily justified. For cars at the lower end of the value spectrum, evaluate carefully.

• F10/F11 M550d: replacement typically 25-50% of vehicle value
• G30/G31 M550d: replacement typically 15-25% of vehicle value
• Rebuilt engines include 12-month warranty

The N57S (F10/F11, 2012-2016) is a 3.0-litre tri-turbo straight-six diesel producing 381hp and 740Nm. The B57S (G30/G31, 2017-2023) is a 3.0-litre quad-turbo straight-six diesel producing 400hp and 760Nm. The B57S is significantly more reliable, with far fewer timing chain issues, though both engines share turbocharger complexity.

• N57S: tri-turbo, 381hp, 740Nm - timing chain is a known issue
• B57S: quad-turbo, 400hp, 760Nm - more reliable, timing chain issues rare

A typical BMW M550d engine replacement takes 4-7 working days for supply and fit through an independent specialist. The complex tri-turbo or quad-turbo setup requires significantly more labour than a standard diesel engine. Allow additional time for parts sourcing and any ancillary work.

• Typical turnaround: 4-7 working days
• Supply only: 1-3 days for dispatch
• Full replacement: 5-8 days including testing
• Complex turbo system adds to labour time

Every rebuilt and reconditioned BMW M550d engine supplied through EnginesMarket carries a minimum 12-month unlimited-mileage warranty. Terms vary by supplier - some offer extended coverage up to 24 months on premium rebuilds. Used engines typically come with a shorter warranty (30-90 days) depending on the supplier and mileage.

• Rebuilt/reconditioned: 12 months minimum, unlimited mileage
• Premium rebuilds: up to 24 months available
• Used engines: 30-90 days typically
• Always confirm exact terms with your chosen supplier