M6 V10 Engines (E63/E64)
from £4,500 to £12,000
Rebuilt units from £4,500 · Common codes: S85B50, S85B50A, S85B50B, S85B50C
BMW ENGINE MARKETPLACE
BMW M6 S63 Performance Engine Replacement - Rebuilt & Options
Get quotes from UK BMW M6 performance engine specialists. Compare rebuilt & reconditioned engines for M6 & M6 Competition - S63 covered. Find UK performance engine specialists.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
M6 V8 Twin-Turbo Engines (F06/F12/F13)
from £5,500 to £14,000
Rebuilt units from £5,500 · Common codes: S63B44A, S63B44B, S63B44C, S63T2
M6 Competition Package Engines
from £6,500 to £16,000
Rebuilt units from £6,500 · Common codes: S63B44C, S63T2, S63B44B (Competition)
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Engine replacement near me - UK-wide specialist network
Compare reconditioned, rebuilt & used engine prices
Supply & fit available - parts and labour from vetted specialistsInstant engine replacement quote - 100% free, no obligationEngine replacement near me - UK-wide specialist networkCompare reconditioned, rebuilt & used engine pricesSupply & fit available - parts and labour from vetted specialistsHow It Works
3 Simple Steps3 Simple Stepsto Finding the Best BMW M6 Replacement Engineto Finding the Best BMW M6 Replacement Engine
12-Month Warranty
Supply & Fit Available
Nationwide Delivery
Trusted UK Suppliers
Most replacements completed within 3-5 days.
Live UK Engine Market Data
What Are UK Drivers Paying for BMW M6 Engine Replacement
The table below shows typical UK rebuilt engine costs across BMW M6 variants, covering documented failure causes, engine codes, fuel types, and engine sizes based on current market data.
Average Market Prices
↻ Last updated: 4 Aug 26, 9:26
Customer Reviews
Trusted by BMW M6 Owners Across the UK
Rated 4.8 out of 5 by 1,081 verified customers who sourced reconditioned and used BMW M6 engines through EngineMarket.
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“Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
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“Got three quotes within an hour and chose the best deal easily. The whole process was quick, clear and stress-free.”
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“I wasn't sure what I needed, but they helped me identify the right engine and connected me with a trusted garage.”
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Variants We Cover
BMW M6 Engine ReplacementAll Variants Covered
M6 Coupe
S85B50 5.0L Petrol
Rebuilt Engines: £4,500-£8,500
M6 Convertible
S85B50 5.0L Petrol
Rebuilt Engines: £4,500-£9,000
M6 Coupe
S63B44A 4.4L Petrol
Rebuilt Engines: £5,500-£10,000
M6 Convertible
S63B44A 4.4L Petrol
Rebuilt Engines: £5,500-£10,500
M6 Gran Coupe
S63B44B 4.4L Petrol
Rebuilt Engines: £5,500-£10,000
M6 Coupe Competition
S63B44C 4.4L Petrol
Rebuilt Engines: £6,000-£11,500
M6 Gran Coupe Competition
S63T2 4.4L Petrol
Rebuilt Engines: £6,500-£12,500
M6 Convertible Competition
S63T2 4.4L Petrol
Rebuilt Engines: £6,500-£12,500
M635CSi
M88 3.5L Petrol
Rebuilt Engines: £3,500-£6,500
M6 Coupe LCI
S63B44B 4.4L Petrol
Rebuilt Engines: £5,800-£11,000
M6 Gran Coupe LCI
S63T2 4.4L Petrol
Rebuilt Engines: £6,500-£12,500
M6 Convertible LCI
S63B44B 4.4L Petrol
Rebuilt Engines: £5,800-£11,000
Not sure which variant your BMW M6 is- Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.
M6
Engine Codes
BMW M6 Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the BMW M6 across all generations, with technical specs, compatible variants and trims, known failure points, and average rebuilt prices from UK specialists. Select any engine code to compare quotes.
Petrol Engines
Extracted from detailed petrol and performance engine families across BMW M6 variants.
M88/3 - 3.5L Petrol
Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
Compatible variants
M635CSi
Avg. rebuilt price
£3,500 - £6,500
Supply only
Technical specifications
- Fuel type
- Petrol
- Engine size
- 3.5L
- Power output
- 286 hp
- Years fitted
- 1983-1989
Common failures
- ●Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
- ●Confirm exact engine code and fitment before ordering.
- ●Ask for warranty and supply & fit terms.
Not sure which engine code?
Can't find your engine code- Enter your registration number above - we'll instantly identify the exact unit, its technical specifications, and live replacement prices from UK BMW M6 engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.
M6
Common Problems
BMW M6 Engine Problems - What It Costs to Fix & When Replacement Makes Sense
The BMW M6’s S85 V10 and S63 V8 twin-turbo engines deliver breathtaking performance, but both have well-documented weak points that drive replacement demand among UK owners. The S85 dominates earlier E63/E64 generation failure searches, while S63 issues-turbo failures, oil consumption, and cooling system problems-define F06/F12/F13 ownership. Every rebuilt...
S85 V10 Rod Bearing Failure - The Most Notorious M6 Engine Weakness
S85 V10 Rod Bearing Failure
Most affected vehicles
Failure mileage range
Typical failure window
Root cause
Repair options & estimated costs (UK ranges)
| Repair tier | Dealer price | Specialist price | What it involves | Longevity / suitability |
|---|---|---|---|---|
| Preventative - Rod Bearing Replacement (before failure) | £2,000 - £3,200 | £1,200 - £2,000 | Replace rod bearings, bolts, oil pump bolts, sump gasket, oil service | 60k-80k miles; suitable for any M6 without existing knock |
| Intermediate - Bearing Replacement + Crankshaft Polish | £3,500 - £5,000 | £2,200 - £3,500 | As above plus crankshaft removal, inspection, and polishing | 30k-60k miles; viable if damage caught early without scoring |
| Full Replacement - Rebuilt / Reconditioned Engine | £14,000 - £18,000 | £6,000 - £9,000 (supply & fit) | Complete S85 replacement engine with upgraded bearings, bench tested, 12-month warranty | 60k+ mile lifespan; only viable option if crank is scored or rods damaged |
Our recommendation
On a BMW M6 worth £15,000-£25,000, preventative rod bearing replacement is the single best investment you can make . Many specialists recommend this as routine maintenance before 80,000 miles-typically £1,200-£2,000 at an independent BMW specialist versus £14,000+ for a full engine replacement after catastrophic failure . If your M6 already has a persistent bottom-end knock or low oil pressure, stop driving immediately; you’re likely looking at a full rebuilt engine.
Compare rebuilt S85B50 engine prices for your BMW M6Replacement Engine Options
BMW M6 Engine TypesOptions, Costs & What to Expect
Every BMW M6 engine type is available through our UK network with typical price ranges based on variant, engine code and budget.
BMW M6 Reconditioned Engines (Recon)£4,500 - £9,500((supply only))
BMW M6 Rebuilt Engines£5,000 - £11,000((supply only))
BMW M6 Used Engines£2,500 - £6,500((supply only))
BMW M6 Remanufactured Engines£6,000 - £13,000((supply only))
BMW M6 Refurbished Engines£3,000 - £7,000((supply only))
Compare BMW M6 engine prices with vetted UK suppliers
All engine types include a minimum 12-month unlimited mileage warranty when sourced through EnginesMarket. Prices are typical UK market ranges based on historical quote data from our network and depend on exact engine code, variant, mileage and supplier. Use our free comparison tool above - enter your registration to get tailored quotes for your specific BMW M6 within hours.
Engine Sizes
BMW M6 Engines by SizeFind the Right Displacement for Your Variant
Every displacement fitted to the BMW M6 is listed below with compatible engine codes, model years, power outputs and common failure notes to help you identify your exact unit.
The original M635CSi (E24) used BMW Motorsport's legendary M88/3 3.5-litre straight-six, producing 286hp and hand-built with individual throttle bodies. This engine established M-division's naturally aspirated performance ethos that would define the M6 lineage for decades to come.
⚙
Engine Code(s)
M88, 3
▣
Compatible Models (UK)
M635CSi
ϟ
Power output
Verified by registration
△
Common Failure Points
Timing chain tensioner wear at higher mileage; regular valve adjustments required
Production Years: E24, 1983-1989
Compare BMW M6 3.5L petrol engine pricesBMW M6 Engines Fuel Type
BMW M6 Engines by Fuel Type
Choose your BMW M6 engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from the original M635CSi to the final Competition Package.
BMW M6 Petrol Engines
PetrolThe BMW M6 has been powered exclusively by high-performance petrol engines across three generations - from the legendary M88/3 straight-six to the S85 V10 and the twin-turbo S63 V8 that dominates replacement enquiries today.
Common BMW M6 Petrol Engine Families
- •M88/3 - original M635CSi straight-six, hand-built with individual throttles
- •S85B50 - the only production V10 ever fitted to a BMW M car (507hp)
- •S63B44A - first-generation twin-turbo V8 (560hp, 2012-2014)
Found In
- •E24 M635CSi (1983-1989) - M88/3 3.5L straight-six
- •E63/E64 M6 Coupe & Convertible (2005-2010) - S85B50 5.0L V10
- •F06/F12/F13 M6 Gran Coupe, Coupe & Convertible (2012-2018) - S63B44 4.4L V8 twin-turbo
Known For
- •S85 V10's 8,250rpm redline and Formula 1-inspired acoustics
- •Rod bearing failure on S85 engines - the most common M6 replacement driver
- •S63 turbocharger wear and oil consumption at higher mileages
Typical Petrol Models
- •M635CSi
- •M6 Coupe (E63/E64)
- •M6 Convertible (E63/E64)
BMW M6 Petrol Engines
PetrolThe BMW M6 has been powered exclusively by high-performance petrol engines across three generations - from the legendary M88/3 straight-six to the S85 V10 and the twin-turbo S63 V8 that dominates replacement enquiries today.
Common BMW M6 Petrol Engine Families
- •M88/3 - original M635CSi straight-six, hand-built with individual throttles
- •S85B50 - the only production V10 ever fitted to a BMW M car (507hp)
- •S63B44A - first-generation twin-turbo V8 (560hp, 2012-2014)
Found In
- •E24 M635CSi (1983-1989) - M88/3 3.5L straight-six
- •E63/E64 M6 Coupe & Convertible (2005-2010) - S85B50 5.0L V10
- •F06/F12/F13 M6 Gran Coupe, Coupe & Convertible (2012-2018) - S63B44 4.4L V8 twin-turbo
Known For
- •S85 V10's 8,250rpm redline and Formula 1-inspired acoustics
- •Rod bearing failure on S85 engines - the most common M6 replacement driver
- •S63 turbocharger wear and oil consumption at higher mileages
Typical Petrol Models
- •M635CSi
- •M6 Coupe (E63/E64)
- •M6 Convertible (E63/E64)
Not sure which fuel type your BMW M6 has- Enter your registration number above to instantly identify your engine code, fuel system and compatible replacement options - all backed by a minimum 12-month unlimited mileage warranty from UK BMW M6 specialists.
Engine YearsCompare 1983-1989 BMW M635CSi engine prices →
BMW M6 Engines by YearWhat Was Fitted & WhenBMW M6 Engines by Year - What Was Fitted & When
This section maps every major engine change across the BMW M6 production timeline from 1983 to 2018, helping owners identify their exact unit and compare rebuilt engine prices from UK specialists.
⚙Key Changes
- ✓M635CSi introduced as the high-performance variant of the E24 6 Series
- ✓M88/3 engine hand-assembled at BMW M's Garching factory
- ✓Limited UK supply with most cars remaining in left-hand drive
- ✓Production ceased in 1989 with no direct successor until 2005
▣Main Engines
M88/3- 3.5L Petrol (M635CSi)
▰Popular Models
- •BMW M635CSi
🔧Known For
- ✓Individual throttle bodies and mechanical fuel injection
- ✓Hand-built M-division engine with 286hp - formidable for its era
- ✓Timing chain tensioner wear on higher-mileage examples
- ✓Rising classic values mean rebuilds are increasingly specialist-led
Engine Codes Covered:
M88/3Not sure which year your BMW M6 was built- Enter your registration number and we'll identify the exact engine, model year, and compatible replacement options instantly - all backed by a minimum 12-month warranty from UK BMW M6 specialists.
FAQ