How much does a BMW M8 F91/F92/F93 engine replacement cost in the UK?

A reconditioned M8 engine typically costs £7,000–£14,000 supply only, depending on variant -the standard S63 sits at £7,000–£12,000, while the Competition variant can reach £8,000–£14,000. Fitting adds £1,040–£1,430. Use our calculator for a personalised figure.

Which BMW M8 F91/F92/F93 engine is the most reliable?

All M8 variants use the same S63 twin-turbo V8 engine in different states of tune. The standard car (591–600 bhp) is marginally less stressed than the Competition (617–625 bhp), but both require meticulous maintenance -particularly rod bearing replacement and crank hub preventative work. Regular oil changes at 5,000-mile intervals are essential.

What are the common problems with the BMW M8 F91/F92/F93?

Rod bearing wear, crank hub spinning, oil leaks from the valve cover and oil filter housing, and cooling system stress -plus the usual electronic gremlins expected from a high-tech luxury performance car. The S63 is a proven engine, but it demands meticulous maintenance.

Is the BMW M8 F91/F92/F93 reliable?

The M8's reliability depends entirely on maintenance history. The S63 engine is robust when properly maintained, but it has well-documented rod bearing and crank hub concerns that require preventative attention. A well-maintained M8 can be a reliable grand tourer; a neglected one will be very expensive.

Which BMW M8 F91/F92/F93 engine should I avoid?

No engine variant is inherently problematic, but any M8 without documented rod bearing and crank hub history is a risky purchase. The Competition variant is more powerful and more desirable -but it also has higher running costs. If you don't need the extra power, the standard car is the smarter choice.

How do I know if my M8 engine needs replacing?

Metallic knocking from the engine (rod bearing failure), timing codes or loss of power (crank hub spinning), persistent oil leaks, or overheating are the key warning signs. Use our diagnostic calculator for a personalised assessment.

Is it worth replacing a BMW M8 F91/F92/F93 engine, or should I scrap the car?

On an M8, replacement almost always makes sense. Against a £40,000 M8, a £9,000 S63 recon is 23% -well within our 70% BMW threshold. Against a well-kept £60,000+ example, the same recon is 15% -a maintenance decision. On a Competition variant, the calculus is similar -the car's value justifies the replacement cost.

How long do BMW M8 F91/F92/F93 engines last?

The S63 can exceed 100,000–150,000 miles with proper maintenance -but requires rod bearing and crank hub preventative work, with oil changes every 5,000 miles maximum. Track use accelerates wear. The M8 is still relatively new, so long-term longevity data is limited.

What is the difference between the F91, F92 and F93 M8?

The F91 is the Convertible (2-door, folding metal roof, 2019–2025). The F92 is the Coupé (2-door fixed roof, 2019–2025). The F93 is the Gran Coupé (4-door, 2019–2025). All three share the same S63 engine family, running gear and performance. The Gran Coupé is the most practical; the Coupé is the lightest; the Convertible offers open-top thrills.

How do I find my BMW M8 F91/F92/F93 engine code?

Listed on the VIN plate and vehicle documentation; block stamping is visible on the engine itself. The S63B44T3 is found in early cars (2019–2020); the S63B44T4 is found in later cars (2020–2025); the S63B44B is the Competition variant. Tell us your variant (M8, M8 Competition) and body style (Coupé, Convertible, Gran Coupé) and we'll identify it -20+ vetted specialists will confirm it for free.

M8 Engine Replacement Cost UK -Compare Quotes

BMW M8 F91/F92/F93 Engine Codes -The Complete Database

Every engine fitted to the first-generation M8 range -from the S63 twin-turbo V8 in the standard model to the higher-output Competition variants.

Engine CodeFamilyFuelDisplacementPowerYears (F91/F92/F93)

VariantsReliability2025 EnquiriesAvg. Recon CostS63B44T3BMW S63

Petrol, twin-turbo4.4L (4395cc)591–600 bhp2019–2020M8, M8 Competition (early)★★★☆☆ [PATTERN DATA]

-(pattern data)£7,000–£12,000 [PLACEHOLDER -confirm vs cost sheet]S63B44T4BMW S63Petrol, twin-turbo4.4L (4395cc)

600–617 bhp2020–2025M8, M8 Competition (late)★★★☆☆ [PATTERN DATA]-(pattern data)£7,000–£12,000 [PLACEHOLDER -confirm vs cost sheet]

S63B44BBMW S63Petrol, twin-turbo4.4L (4395cc)625 bhp2020–2025

Engine CodeFuelPowerYearsReliabilityEnquiriesAvg. Recon Cost

VariantsReliability2025 EnquiriesS63B44T3BMW S63

Petrol, twin-turbo4.4L (4395cc)591–600 bhpM8, M8 Competition (early)★★★☆☆ [PATTERN DATA]

-(pattern data)£7,000–£12,000 [PLACEHOLDER -confirm vs cost sheet]S63B44T4Petrol, twin-turbo4.4L (4395cc)

600–617 bhp2020–2025M8, M8 Competition (late)-(pattern data)£7,000–£12,000 [PLACEHOLDER -confirm vs cost sheet]

S63B44BBMW S63Petrol, twin-turbo625 bhp2020–2025

Overview

BMW M8 F91/F92/F93 -Overview

The F91/F92/F93 is the first-generation BMW M8, the high-performance version of the G15 8 Series.

Introduced in June 2019, the M8 was initially produced in the 2-door convertible (F91) and 2-door coupé (F92) body styles, with a 4-door Gran Coupé (F93) added in October 2019. Production ran from July 2019 to October 2025. Powered by the S63 twin-turbocharged V8 engine shared with the F90 M5, the M8 marked BMW M's return to the grand tourer segment following the M6.

Key Facts

Platform

BMW CLAR (shared with G15 8 Series, G30 5 Series)

Predecessor

BMW M6 (F06/F12/F13)

Successor

Current model -no successor announced

Sibling body styles in this generation

F91 (Convertible), F92 (Coupé), F93 (Gran Coupé)

Market Intelligence

As a low-volume, high-performance model that recently ended production in October 2025, the M8 is a niche enthusiast vehicle -the Competition variants are the most sought-after for their 625 bhp output, while the Gran Coupé offers the most practicality.

BMW M8 F91/F92/F93 -Overview

The F91/F92/F93 is the first-generation BMW M8, the high-performance version of the G15 8 Series.

Introduced in June 2019, the M8 was initially produced in the 2-door convertible (F91) and 2-door coupé (F92) body styles, with a 4-door Gran Coupé (F93) added in October 2019. Production ran from July 2019 to October 2025. Powered by the S63 twin-turbocharged V8 engine shared with the F90 M5, the M8 marked BMW M's return to the grand tourer segment following the M6.

Key Facts

Platform

BMW CLAR (shared with G15 8 Series, G30 5 Series)

Predecessor

BMW M6 (F06/F12/F13)

Successor

Current model -no successor announced

Sibling body styles in this generation

F91 (Convertible), F92 (Coupé), F93 (Gran Coupé)

Market Intelligence

As a low-volume, high-performance model that recently ended production in October 2025, the M8 is a niche enthusiast vehicle -the Competition variants are the most sought-after for their 625 bhp output, while the Gran Coupé offers the most practicality.

Best & Worst Engines

Thin-Data Summary

“The M8's engine range is defined by one engine family -the S63 twin-turbocharged V8 -in three states of tune. The S63B44T3 (2019–2020) produces 591–600 bhp and is found in early standard and Competition models. The S63B44T4 (2020–2025) produces 600–617 bhp in later standard and Competition models. The S63B44B is the Competition variant producing 625 bhp. All M8s use an 8-speed ZF automatic transmission (M-Steptronic) and M xDrive all-wheel drive with rear-wheel-drive mode. The S63 is a proven engine with a well-documented reputation -but it carries the same rod bearing and crank hub concerns that affect the M5 (F90) and other S63-powered models. If you're buying an M8, the Competition variant offers the most performance; the standard car is more accessible; all require meticulous maintenance.”

Who it's for:

Thin-Data Summary

“The M8's engine range is defined by one engine family -the S63 twin-turbocharged V8 -in three states of tune. The S63B44T3 (2019–2020) produces 591–600 bhp and is found in early standard and Competition models. The S63B44T4 (2020–2025) produces 600–617 bhp in later standard and Competition models. The S63B44B is the Competition variant producing 625 bhp. All M8s use an 8-speed ZF automatic transmission (M-Steptronic) and M xDrive all-wheel drive with rear-wheel-drive mode. The S63 is a proven engine with a well-documented reputation -but it carries the same rod bearing and crank hub concerns that affect the M5 (F90) and other S63-powered models. If you're buying an M8, the Competition variant offers the most performance; the standard car is more accessible; all require meticulous maintenance.”

Who it's for:

BMW M8 F91/F92/F93 -Ownership Economics

EngineTypical MileageCommon Major FailureRepair Cost (Specialist)Replacement Cost (Recon)Ownership Verdict

S63 4.4 V8 (Standard)30k–60kRod bearing wear, crank hub, oil leaks£2,000–£5,000£7,000–£12,000

High Performance -outstanding but costly

S63 4.4 V8 (Competition)30k–60kRod bearing wear, crank hub, oil leaks£2,500–£6,000£8,000–£14,000

Most Expensive -the ultimate M8, with ultimate costs

EngineTypical MileageCommon Major FailureRepair Cost (Specialist)Replacement Cost (Recon)Ownership Verdict

S63 4.4 V8 (Standard)30k–60kRod bearing wear, crank hub, oil leaks£2,000–£5,000£7,000–£12,000

High Performance -outstanding but costly

S63 4.4 V8 (Competition)30k–60kRod bearing wear, crank hub, oil leaks£2,500–£6,000£8,000–£14,000

Most Expensive -the ultimate M8, with ultimate costs

The M8 rule

A £7,000–£12,000 S63 recon against a £40,000 M8 sits at 18–30% of the car's value -within our 70% BMW threshold. Against a well-kept £60,000+ example, the same recon drops to 12–20% -a maintenance decision. On a Competition variant, the costs are higher but proportional to the car's value. The M8's high retained value means replacement almost always makes sense.

Key Takeaways

Which M8 Costs Least To Own?
S63 standard car -slightly lower power, marginally lower running costs.
Which M8 Costs Most To Own?
S63 Competition -higher output, higher running costs.
Which M8 Is Best Value?
S63 standard car -the most accessible M8 variant.

Common Problems

01

S63

Rod Bearing Wear

Affected models:

All M8 F91/F92/F93 variants (S63 engine).

Typical failure mileage:

30,000–60,000 miles.

Root cause:

The S63's rod bearings can wear prematurely, particularly when the engine is revved hard before reaching operating temperature. This is a well-documented issue across the S63 family, shared with the M5 (F90) and X5 M/X6 M. Metallic knocking or low oil pressure are the classic warning signs.

Tiered Cost Table

Our Recommendation

If you own an M8, budget for rod bearing replacement as preventative maintenance at 30,000–50,000 miles. A £1,500–£3,500 investment is far cheaper than the £7,000–£12,000 engine replacement that follows a failure. Use the correct oil, warm the engine properly before hard driving, and change oil every 5,000 miles maximum.

Compare S63 engine prices for your M8

02

S63

Crank Hub Spinning

Affected models:

All M8 F91/F92/F93 variants (S63 engine).

Typical failure mileage:

30,000–60,000 miles.

Root cause:

The S63's crank hub can spin on the crankshaft, causing timing to slip and potentially catastrophic engine damage. This is more prevalent in cars with aggressive upshifts or tuned engines. Timing codes and loss of power are the classic warning signs.

Tiered Cost Table

Our Recommendation

If you own an M8, budget for a crank hub fix as preventative maintenance alongside the rod bearing replacement. A £1,500–£3,500 investment is far cheaper than the £7,000–£12,000 engine replacement that follows a failure. Avoid aggressive downshifts and tune responsibly.

Compare S63 crank hub repair services for your M8

03

S63

Oil Leaks & Cooling System Stress

Affected models:

All M8 F91/F92/F93 variants (S63 engine).

Typical failure mileage:

30,000–60,000 miles.

Root cause:

The S63 can develop oil leaks from the valve cover gaskets and oil filter housing. The cooling system is also under significant stress in the high-performance M8, with coolant hose leaks and radiator cracks possible on tracked cars.

Tiered Cost Table

Our Recommendation

Have the valve cover gaskets and cooling system inspected at every service. Address any oil leaks or coolant loss immediately -a £500–£1,200 preventative repair is far cheaper than a £7,000+ engine replacement. If you track your M8, consider upgrading the cooling system.

Compare M8 engine gasket and cooling parts for your F91/F92/F93

M8 Engine Replacement Costs -By Engine and Condition

VariantEngine CodeUsed (Supply)Reconditioned (Supply)Rebuilt (Supply)Labour Hours

M8 (Standard, early)S63B44T3£4,000–£7,000£7,000–£12,000£9,000–£15,00016–22 hrs

M8 (Standard, late)S63B44T4£4,500–£7,500£7,500–£12,500£9,500–£16,00016–22 hrs

M8 CompetitionS63B44B£5,000–£8,000£8,000–£14,000£10,000–£18,00016–22 hrs

Core Variants

Diesel & Petrol Lineup

Petrol Variants

M8M8 Competition

Scope note: All variants listed are first-generation M8 only (2019–2025). The M8 was available in three body styles: F91 (Convertible), F92 (Coupé), and F93 (Gran Coupé). All share the same S63 engine family.

Diesel & Petrol Lineup

Petrol Variants

M8M8 Competition

Scope note: All variants listed are first-generation M8 only (2019–2025). The M8 was available in three body styles: F91 (Convertible), F92 (Coupé), and F93 (Gran Coupé). All share the same S63 engine family.

Market Intelligence

Most Requested E90 Engines (2025)

Most Requested E90 Variants

Average E90 Replacement Cost

Most Common E90 Failures

FAQ

BMW 3 Series E90 rear three-quarter view

Why UK BMW M8 F91/F92/F93 Owners Trust bmwengines.uk

Trusted M8 Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real M8 owners, as part of the Engine Finders network.
Compare M8 Engine Replacement Companies
see prices, warranty terms and supply & fit options side-by-side before you commit.
UK Engine Replacement Services for M8
covering every variant from standard M8 to M8 Competition, across Coupé, Convertible and Gran Coupé body styles, with supply-only or full supply & fit available nationwide.

Find the best BMW M8 F91/F92/F93 engine replacement UK drivers rely on. Compare real prices from trusted specialists on EnginesMarket today and get back on the road with confidence.

Compare BMW M8 F91/F92/F93 Engine Prices on EnginesMarket

Why UK BMW M8 F91/F92/F93 Owners Trust bmwengines.uk

Trusted M8 Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real M8 owners, as part of the Engine Finders network.
Compare M8 Engine Replacement Companies
see prices, warranty terms and supply & fit options side-by-side before you commit.
UK Engine Replacement Services for M8
covering every variant from standard M8 to M8 Competition, across Coupé, Convertible and Gran Coupé body styles, with supply-only or full supply & fit available nationwide.

Find the best BMW M8 F91/F92/F93 engine replacement UK drivers rely on. Compare real prices from trusted specialists on EnginesMarket today and get back on the road with confidence.

Compare BMW M8 F91/F92/F93 Engine Prices on EnginesMarket

BMW M8 F91/F92/F93 Engines -The Complete UK Guide

BMW M8 F91/F92/F93 Engine Codes -The Complete Database

BMW M8 F91/F92/F93 -Overview

BMW M8 F91/F92/F93 -Overview

Best &amp; Worst Engines

BMW M8 F91/F92/F93 -Ownership Economics

Common Problems

M8 Engine Replacement Costs -By Engine and Condition

Diesel &amp; Petrol Lineup

Diesel &amp; Petrol Lineup

Market Intelligence

FAQ

Why UK BMW M8 F91/F92/F93 Owners Trust bmwengines.uk

Why UK BMW M8 F91/F92/F93 Owners Trust bmwengines.uk

Best & Worst Engines

Diesel & Petrol Lineup

Diesel & Petrol Lineup