BMW 6 Series N57/B57/B58 Specialist Engine ReplacementCompare Quotes

BMW 6 Series engine replacement costs range from £2,300 for used units to £14,500 for M6 V8 rebuilt engines. Most common N57 diesel replacements average £3,430-£4,200 supply-only. Prices vary by engine code, variant, and whether you choose rebuilt, reconditioned or used.

• 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

The B58 3.0L petrol and B57 3.0L diesel are the most reliable BMW 6 Series engines, featuring closed-deck blocks and improved thermal management. These G32 Gran Turismo units avoid the timing chain and turbo issues affecting earlier N-family engines.

• 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

BMW addressed N57 timing chain tensioner failures in post-2015 BMW 6 Series engines with revised components and improved oil pressure management. Pre-2015 N57D30A units remain high-risk for rear-mounted chain stretch between 70k-100k miles.

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

Early N63B44A V8 engines in BMW 6 Series require careful evaluation due to known thermal management and oil consumption issues. Post-2014 N63TU technical update variants offer significantly improved reliability with revised cooling and valve stem seals.

• 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

With proper servicing, BMW 6 Series engines typically reach 150,000-200,000 miles before major overhaul. Diesel N57 and petrol B58 units often exceed 200k miles with timely oil changes, while high-performance S85 V10 requires more frequent specialist attention.

• 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

Replacing a BMW 6 Series engine is worthwhile if the chassis, transmission and interior remain in good condition. A rebuilt engine from £3,430 can extend vehicle life by 80,000+ miles, often costing less than purchasing a comparable replacement vehicle.

• 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

Excessive oil consumption in BMW 6 Series N62 and N63 V8 engines stems primarily from hardened valve stem seals and worn piston rings allowing oil into combustion chambers. High operating temperatures accelerate seal degradation, particularly on pre-2014 units.

• 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

G32 Gran Turismo BMW 6 Series diesel engines with B47/B57 codes are Euro 6d compliant and ULEZ exempt. Earlier E63/F-generation N57 diesel replacements can be supplied with cleaned DPF systems for MOT compliance, though ULEZ exemption depends on original vehicle registration date.

• 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

Yes, specialist suppliers offer upgraded BMW 6 Series engine variants like the N63R with reinforced components or calibrated ECU maps for enhanced performance. However, cross-generation swaps or fuel-type conversions require extensive modification and are rarely cost-effective for road use.

• 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

Your BMW 6 Series engine code appears on the V5C registration document, engine bay sticker, or can be decoded via VIN lookup tools. Common codes include N57D30 for 640d diesel, N55B30 for 640i petrol, and B57D30 for newer Gran Turismo variants.

• 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