BMW 6 Series 630d Engine ReplacementCompare Prices & Get Quotes

A BMW 6 Series 630d engine replacement typically costs £2,300-£3,800 for a used N57 or B57 unit, £3,200-£4,600 for a reconditioned engine, and £4,200-£5,800 for a fully rebuilt engine with 12-month warranty. Supply and fit costs add approximately £800-£1,200 depending on your location and the specialist's labour rates.

• Used engines: lowest cost, variable mileage and condition
• Reconditioned engines: mid-range, with replaced wearing components
• Rebuilt engines: highest cost, fully stripped and restored to OE spec
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The most common signs of N57 or B57 engine trouble in a 630d include: rattling noise from the engine bay at startup (timing chain stretch), loss of power and warning lights (DPF/EGR blockage), excessive smoke from the exhaust (turbocharger failure), and rough idling or reduced performance.

• Timing chain issues: rattling on startup, rough idle
• DPF/EGR issues: loss of power, poor fuel economy, warning lights
• Turbo issues: whining noise, smoke, power loss
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Yes - if your BMW 6 Series 630d is otherwise in good condition, a replacement engine can extend its life by 80,000+ miles and retain strong value. With a typical 2014-2017 630d valued at £10,000-£18,000, a rebuilt engine at £4,200-£5,300 plus fitting represents a sound investment compared to the £7,500-£10,000 main dealer alternative.

• Vehicle worth £15,000+: rebuilt engine is cost-effective
• Vehicle worth £8,000-£15,000: reconditioned is viable if keeping the car 2+ years
• Vehicle worth under £8,000: used engine typically makes more sense
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Most BMW 6 Series 630d engine replacements take 1-3 days for supply and fit at a specialist garage. Collection and delivery options are available nationwide, with most engines dispatched within 24-72 hours of order confirmation. The exact turnaround depends on the condition type chosen (used engines are typically faster to source; rebuilt units may have longer lead times for the rebuild process).

• Supply only: 24-72 hours dispatch
• Supply and fit: 1-3 days at specialist garage
• Nationwide collection/delivery available
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Yes - all rebuilt BMW 6 Series 630d engines supplied through EnginesMarket include a minimum 12-month unlimited-mileage warranty. Used engines typically come with a 3-6 month warranty depending on the supplier, and reconditioned engines often carry a 12-24 month warranty. Always confirm the exact warranty terms with your chosen supplier before purchasing.

• Rebuilt engines: 12+ months unlimited mileage
• Reconditioned engines: 12-24 months
• Used engines: 3-6 months typically
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The N57 (2008-2018) is BMW's previous-generation 3.0-litre diesel, available in single, twin and triple-turbo variants. The B57 (2015-present) is BMW's modular replacement, featuring a lightweight aluminum block, advanced common-rail injection, and improved emissions technology. B57 engines are generally more reliable and fuel-efficient, but both share common diesel-related issues like DPF and EGR clogging.

• N57: older, timing chain issues more common, twin-turbo variants available
• B57: newer, more efficient, mild-hybrid options from 2020
• Both: 3.0L, six-cylinder, 2,993cc displacement