8 Series Diesel Engines
from £2,100 to £4,200
Rebuilt units from £2,400 · Common codes: B57D30A, B57D30B, B57D30C
BMW ENGINE MARKETPLACE
BMW 8 Series B57/B58/N63 Specialist Engine Replacement - Compare Quotes
Get specialist quotes from UK BMW 8 Series engine experts. Compare reconditioned & rebuilt engines for 840d to M8 - B57/B58/N63 covered. Get specialist quotes for your 8 Series.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
8 Series Petrol Engines
from £3,200 to £5,200
Rebuilt units from £3,200 · Common codes: B58B30A, B58B30B, B58B30C
8 Series Performance V8 Engines
from £4,900 to £12,000
Rebuilt units from £4,900 · Common codes: N63TU2, S63TU, N63B44T3
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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 8 Series Replacement Engineto Finding the Best BMW 8 Series 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 8 Series Engine Replacement
The table below shows typical UK rebuilt engine costs across BMW 8 Series variants, covering documented failure causes, chassis generations, engine codes, and fuel types based on current market data.
Average Market Prices
↻ Last updated: 4 Aug 26, 9:26
Customer Reviews
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Rated 4.8 out of 5 by 1,081 verified customers who sourced reconditioned and used BMW 8 Series engines through EngineMarket.
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Variants We Cover
BMW 8 Series Engine ReplacementAll Variants Covered
8 Series 830d
B57D30C 3.0L Diesel
Rebuilt Engines: £2,100-£3,800
8 Series M8 Competition
S63B44T4 4.4L V
Rebuilt Engines: £7,500-£12,500
8 Series E31 850Ci
M70B50 5.0L V
Rebuilt Engines: £6,500-£11,000
8 Series E31 830i
M60B30 3.0L Inline
Rebuilt Engines: £3,900-£6,500
Not sure which variant your BMW 8 Series is- Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.
8 Series
Engine Codes
BMW 8 Series Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the BMW 8 Series 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 8 Series variants.
B57D30A - 3.0L Diesel
Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
Compatible variants
840d xDrive Coupe840d xDrive Convertible840d xDrive Gran Coupe M Sport840d xDrive Gran Coupe Luxury
Avg. rebuilt price
£2,400 - £4,200
Supply only
Technical specifications
- Fuel type
- Diesel
- Engine size
- 3.0L
- Power output
- 315-320 hp
- Years fitted
- 2018-2024
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 8 Series engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.
8 Series
Common Problems
BMW 8 Series Engine Problems - What It Costs to Fix & When Replacement Makes Sense
While the BMW 8 Series delivers exceptional refinement, the high-performance N63 V8, modern B57 diesel, and classic M70 V12 families are prone to specific thermal and emissions-related failures that drive replacement demand. Every rebuilt engine supplied through EnginesMarket includes upgraded internal components designed to address these original BMW 8...
BMW 8 Series N63 Turbo & Timing Chain Failure - Why Hot-V V8 Engines Fail Prematurely
BMW 8 Series N63 Turbo & Timing Chain Failure
Most affected vehicles
BMW 8 Series M850i xDriveM8 Competition Coupe/Convertible/Gran Coupe (2019-2024
BMW 8 Series M850i xDrive, M8 Competition Coupe/Convertible/Gran Coupe (2019-2024, N63TU2 & S63B44T4)
Failure mileage range
50,000 - 80,000 miles
Typical failure window
Root cause
The compact hot-V turbo layout traps intense heat around the timing chains and turbo bearings, accelerating tensioner wear and oil carbonisation that triggers rattling, boost loss, and eventual catastrophic timing jump.
Repair options & estimated costs (UK ranges)
| Repair tier | Dealer price | Specialist price | What it involves | Longevity / suitability |
|---|---|---|---|---|
| Minor - Preventative Chain & Tensioner Update | £3,500 - £4,500 | £2,200 - £3,000 | Removal of front covers, replacement of updated metal tensioners, reinforced guide rails, and high-temp seals | 40,000 - 60,000 additional miles. Only viable if chains have not yet stretched or jumped |
| Intermediate - Turbocharger & Bearing Replacement | £5,000 - £6,500 | £3,200 - £4,500 | Drop and replace dual turbo assemblies, upgrade bearing cores, flush intercooler lines, and recalibrate boost sensors | 30,000 - 50,000 miles. Does not resolve underlying timing chain stress or oil consumption |
| Full Replacement - Rebuilt / Reconditioned Engine | £9,500 - £12,500 | £4,900 - £7,500 | Complete removal and swap with specialist-rebuilt unit featuring upgraded tensioners, reinforced block, and bench-tested turbo integration. Supply & fit included | 80,000 - 120,000+ miles. Resets all wear counters, includes 12-month warranty, and addresses both timing and thermal failures simultaneously |
Our recommendation
On a BMW 8 Series worth £35,000 to £85,000, a preventative chain update at 50,000 miles is the most cost-effective intervention. However, if you are already experiencing startup rattling, excessive oil consumption, or limp mode, we recommend a full specialist rebuild. Main dealer component replacements rarely resolve the compounding thermal issues, whereas a fully reconditioned unit with updated metallurgy provides permanent reliability.
Compare rebuilt N63TU2 & S63 engine prices for your BMW 8 SeriesReplacement Engine Options
BMW 8 Series Engine TypesOptions, Costs & What To Expect
Every engine type is available through the UK network with typical price ranges based on variant, engine code and budget.
BMW 8 Series Reconditioned Engines (Recon)£2,400 - £5,800((supply only))
BMW 8 Series Rebuilt Engines£2,800 - £6,200((supply only))
BMW 8 Series Used Engines£1,800 - £3,500((supply only))
BMW 8 Series Remanufactured Engines£4,500 - £8,900((supply only))
BMW 8 Series Refurbished Engines£1,500 - £3,200((supply only))
Compare BMW 8 Series engine prices with vetted UK suppliers
All engine types include a minimum 12-month unlimited mileage warranty when sourced through EngineMarket. 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 8 Series within hours.
Engine Sizes
BMW 8 Series Engines by SizeFind the Right Displacement for Your Variant
Every engine displacement officially fitted to the BMW 8 Series across all UK generations is listed below, complete with compatible engine codes, production years and common failure notes for accurate identification.
The sole diesel option across the modern G-chassis lineup, the 3.0-litre inline-six delivers effortless torque for grand touring while meeting strict Euro 6 emissions standards. Available in the 830d and 840d variants, this highly efficient unit pairs advanced twin-scroll turbocharging with precise common-rail injection to balance performance with exceptional long-distance comfort.
⚙
Engine Code(s)
B57D30A, B57D30B, B57D30C
▣
Compatible Models (UK)
830d (G15/G16/G14, 2021-present), 840d xDrive
ϟ
Power output
Verified by registration
△
Common Failure Points
EGR cooler cracking, DPF blockage from frequent short urban journeys.
Production Years: G15/G16/G14, 2018-present
Get quotes for BMW 8 Series 3.0L diesel enginesBMW 8 Series Engines Fuel Type
BMW 8 Series Engines by Fuel Type
Choose your BMW 8 Series engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from early E31 V12s to the latest G-chassis 48V mild-hybrid units.
BMW 8 Series Diesel Engines
DieselDominating the modern G-chassis range, these 3.0-litre inline-six turbo-diesels deliver exceptional torque and refined motorway cruising efficiency across the 830d and 840d line-up.
Common BMW 8 Series Diesel Engine Families
- •B57D30A - Core 3.0L unit for early 840d xDrive, high torque output with advanced twin-scroll turbocharging
- •B57D30B - LCI updated variant featuring refined emissions calibration and improved EGR thermal management
- •B57D30C - Entry-level 830d detuned version optimised for lower tax bands and urban driving cycles
Found In
- •G15/G16/G14 Coupe/Gran Coupe/Convertible (2018-present) - B57D30 family
Known For
- •Exceptional high-mileage motorway economy and seamless power delivery
- •EGR cooler cracking and DPF saturation on predominantly short-journey vehicles
- •High UK specialist replacement demand on 840d xDrive variants
Typical Diesel Models
- •830d
- •840d xDrive Coupe
- •840d xDrive Gran Coupe
1 of 3
BMW 8 Series Diesel Engines
DieselDominating the modern G-chassis range, these 3.0-litre inline-six turbo-diesels deliver exceptional torque and refined motorway cruising efficiency across the 830d and 840d line-up.
Common BMW 8 Series Diesel Engine Families
- •B57D30A - Core 3.0L unit for early 840d xDrive, high torque output with advanced twin-scroll turbocharging
- •B57D30B - LCI updated variant featuring refined emissions calibration and improved EGR thermal management
- •B57D30C - Entry-level 830d detuned version optimised for lower tax bands and urban driving cycles
Found In
- •G15/G16/G14 Coupe/Gran Coupe/Convertible (2018-present) - B57D30 family
Known For
- •Exceptional high-mileage motorway economy and seamless power delivery
- •EGR cooler cracking and DPF saturation on predominantly short-journey vehicles
- •High UK specialist replacement demand on 840d xDrive variants
Typical Diesel Models
- •830d
- •840d xDrive Coupe
- •840d xDrive Gran Coupe
BMW 8 Series Petrol Engines
PetrolSpanning classic naturally aspirated V12s to modern twin-turbo V8s and precision inline-sixes, this fuel type covers the broadest performance spectrum of the 8 Series lineage.
Common BMW 8 Series Petrol Engine Families
- •B58B30 - Modern 3.0L turbo inline-six renowned for B-series reliability and smooth 840i power delivery
- •N63TU2/N63B44T3 - Hot-vee 4.4L V8 twin-turbo powering M850i variants, known for intense thermal loads
- •S63TU/S63B44T4 - Motorsport-derived high-output 4.4L V8 reserved exclusively for M8 Competition models
Found In
- •E31 Coupe (1990-1999) - M30B30, M60B40, M70B50, S70B56
- •G15/G16/G14 Coupe/Gran Coupe/Convertible (2018-present) - B58B30, N63TU2, S63TU
Known For
- •B58 inline-six widely praised for factory reliability and low maintenance overheads
- •N63 hot-vee turbo layout prone to valve stem seal degradation and timing chain wear
- •Classic M70 V12 cooling system vulnerability and complex ancillary routing
Typical Petrol Models
- •830i (E31)
- •840Ci (E31)
- •840i Coupe/Gran Coupe
BMW 8 Series Mild Hybrid (MHEV) Engines
MHEVIntegrated 48-volt starter-generator technology introduced during the 2022 LCI facelift to improve stop-start responsiveness and marginally reduce urban fuel consumption.
BMW 8 Series Mild Hybrid (MHEV) Engine Codes
- •B58B30 (LCI) - Updated inline-six with integrated 48V belt-driven starter-generator for 840i variants
- •B57D30 (LCI) - Revised diesel block paired with 48V system for enhanced torque fill and coasting efficiency
Found In
- •840i, 840d xDrive LCI models (2022-present)
Important Notes
- •48-volt lithium-ion battery captures braking energy to power ancillaries and assist acceleration
- •Enables extended engine-off coasting and smoother stop-start transitions in traffic
- •Engine replacement requires concurrent hybrid system diagnostics and battery health verification
Not sure which fuel type your BMW 8 Series 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 8 Series specialists.
Engine YearsGet quotes for 1990-1992 BMW 8 Series replacement engines →
BMW 8 Series Engines by YearWhat Was Fitted & WhenBMW 8 Series Engines by Year - What Was Fitted & When
This technical timeline covers every major engine change across the BMW 8 Series production span from 1990 to present, organised so owners can quickly identify their exact engine code and compare rebuilt replacement prices from UK specialists.
⚙Key Changes
- ✓E31 coupe platform launched with advanced multi-link rear suspension and aluminium suspension components
- ✓M70B50 5.0L V12 introduced as range-topping powerplant with dual ECUs and electronic throttle
- ✓M30B30 3.0L inline-six offered as entry-level option for traditional BMW smoothness
- ✓Advanced onboard diagnostics and ASC+T traction control integrated from launch
▣Main Engines
M70B50- 5.0L petrol V12 (850i / 850Ci)
M30B30- 3.0L petrol inline-6 (830i early production)
▰Popular Models
- •BMW 850i
- •BMW 850Ci
- •BMW 830i
🔧Known For
- ✓Unparalleled V12 smoothness and effortless torque delivery for continental cruising
- ✓Complex dual-ECU management system requiring specialist diagnostic equipment
- ✓Early plastic cooling components prone to age-related cracking after 25+ years
- ✓High collector value driving demand for heritage-spec rebuilt engines
Engine Codes Covered:
M70B50M30B30Not sure which year your BMW 8 Series 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 8 Series specialists.
FAQ