BMW 6 Series Engine ReplacementCompare Prices & Save

Key points

• • N57 diesel engines typically cost £3,430-£4,200 rebuilt supply-only
• • N55 petrol units average £4,820-£6,200 for rebuilt replacements
• • M6 S63 V8 specialist rebuilds range £10,870-£14,500 fully rebuilt
• • Used engines start around £2,300 but carry shorter warranty coverage
• • All rebuilt units include 12-month unlimited mileage warranty minimum

Key points

• • B58 petrol engines feature closed-deck blocks for superior durability
• • B57 diesel units include revised timing chain tensioners post-2015
• • N52 naturally aspirated petrol engines are robust but age-related seals fail
• • Avoid early N63 V8 units due to thermal management design flaws
• • M6 S85 V10 requires specialist maintenance but rewards with performance

Key points

• • Pre-2015 N57D30A engines suffer rear timing chain tensioner wear
• • Post-2015 N57D30B units include reinforced tensioners and guides

Key points

• • Early N63B44A units suffer excessive oil consumption and turbo failures
• • N63TU technical update models feature reinforced valve stems and cooling
• • Budget £3,930-£5,500 for rebuilt N63 replacements if issues arise
• • Regular oil changes with correct BMW LL-01 spec are critical
• • Consider B58 petrol or B57 diesel alternatives for lower running costs

Key points

• • N57 diesel engines commonly reach 180k miles with regular servicing
• • B58 petrol units benefit from closed-deck design for longevity
• • S85 V10 M6 engines need rod bearing checks every 60k miles
• • Using correct BMW Longlife oil specs extends engine lifespan significantly
• • Addressing minor leaks early prevents costly major component failures

Key points

• • Rebuilt engines cost £3,430-£6,200 versus £15k+ for similar replacement cars
• • Good-condition F06/F12 chassis retain strong resale value post-rebuild
• • M6 variants especially benefit from specialist rebuilds given high purchase prices
• • Supply and fit services simplify installation at UK BMW specialists
• • 12-month warranty on rebuilt units provides financial protection post-repair

Key points

• • Valve stem seals harden with heat, allowing oil past valve guides
• • N63 hot-V layout creates extreme under-bonnet temperatures accelerating wear
• • Blue exhaust smoke on startup indicates seal failure requiring attention
• • Rebuilt V8 engines include upgraded seals and revised PCV systems
• • Regular oil level checks prevent catalytic converter damage from oil burn

Key points

• • G32 B47/B57 diesel engines meet Euro 6d emissions standards fully
• • N57 diesel replacements retain original vehicle emissions classification for ULEZ
• • DPF cleaning or replacement ensures MOT emissions test compliance
• • AdBlue system functionality must be verified post-engine installation
• • Check your vehicle's V5C registration date to confirm ULEZ status

Key points

• • N63R upgraded variants feature reinforced valve stems and improved cooling
• • ECU remapping can unlock additional power from rebuilt turbo engines
• • Cross-generation engine swaps require custom wiring and ECU calibration
• • Petrol-to-diesel conversions are not recommended due to emissions complexity
• • Specialist consultation ensures upgrade compatibility with your specific chassis

Key points

• • Check your V5C logbook section V.5 for the engine code reference
• • Engine bay identification sticker displays the full code like N57D30A
• • Online VIN decoders instantly match your chassis to compatible engine codes
• • Entering your registration on EngineMarket shows exact replacement compatibility
• • Knowing your code ensures you receive the correct rebuilt engine unit