BMW M5 F90Saloon2017–2023

BMW M5 F90 Engines — The Complete UK Guide

Every powertrain fitted to the F90 super-saloon — from the 600 PS 4.4-litre twin-turbo V8 in the standard M5 to the 625 PS Competition and the 635 PS CS that sent the F90 out with a bang.

Real UK replacement costs and honest reliability data for BMW's last purely petrol-powered M5.

Backed by real UK enquiries [BMW-VERIFIED].

Explore F90 M5 Powertrains
  • 5 Series Enquiries (2025)BMW-VERIFIED
  • SaloonBody Style
  • 3PowertrainsCovered
  • Part ofEngine FindersUK's #1 Engine Marketplace

Engine Database

BMW M5 F90 Engine Codes — The Complete Database

Every powertrain fitted to the F90 M5 — the S63 4.4-litre twin-turbo V8 in standard, Competition, and CS specification.

Engine CodeFuelPowerYearsReliabilityEnquiries (2025)Avg. Recon Cost
S63B44T4BMW S63Petrol600 PS(441 kW)2017–2023★★★☆☆PROVISIONALpending dedicated Engine Page—(pattern data)£6,000–£12,000[BMW-QUOTE]
S63B44BBMW S63Petrol625 PS(460 kW)2018–2023★★★☆☆PROVISIONALpending dedicated Engine Page—(pattern data)£6,500–£13,000[BMW-QUOTE]
S63B44BBMW S63Petrol635 PS(467 kW)2021–2023★★★☆☆PROVISIONALpending dedicated Engine Page—(pattern data)£8,000–£15,000[BMW-QUOTE]

Engine Specifications

  • Configuration: V8 90°, 32-valve, twin-turbocharged
  • Bore x Stroke: 89.0 mm x 88.3 mm
  • Compression Ratio: 10.0:1
  • Redline: 7,200 RPM
  • Valvetrain: DOHC, Double-VANOS
  • Fuel System: Direct injection (350 bar)
  • Turbochargers: Twin-scroll, 25.9 psi max boost
  • Block Material: Aluminium
  • Transmission: 8-speed M Steptronic (ZF 8HP)
BMW M5 F90 -Overview

Overview

BMW M5 F90 — Overview

The F90 is the sixth generation of the BMW M5, an executive super-saloon produced from 2017 to 2023. It was the first M5 to feature all-wheel drive (xDrive) and the last purely petrol-powered M5 before the G90 hybrid. The F90 is built on the BMW CLAR platform and shares its underpinnings with the G30 5 Series. The engine is the S63 4.4-litre twin-turbo V8 — a development of the F10 M5's engine with upgraded turbos and revised cooling.

The line‑up includes the standard M5 (600 PS), the M5 Competition (625 PS), and the limited-run M5 CS (635 PS). A 2020 Life Cycle Impulse brought revised styling, iDrive 7, and subtle chassis updates. The F90 was discontinued in 2023 and succeeded by the G90 hybrid M5.

Key Facts

  • PlatformBMW CLAR
  • PredecessorBMW M5 (F10)
  • SuccessorBMW M5 (G90)
  • Sibling Body Styles in this GenerationG30 5 Series, G31 5 Series Touring

Market Intelligence

The 5 Series nameplate generated significant UK engine enquiries in 2025 [BMW-VERIFIED], with demand for the F90 M5 concentrated on the Competition model based on market patterns.

04Best & Worst Engines

Best & Worst Engines

S63 4.4-litre twin-turbo V8 -standard, Competition, CS.

Overall Verdict

S63 4.4-litre twin-turbo V8 — standard, Competition, CS.

“The S63 4.4-litre twin-turbo V8 is the heart of every F90 M5 — in standard, Competition, and CS form, it's essentially the same engine with different power outputs. The M5 Competition (625 PS) is the sweet spot — more power than the standard car, but without the CS's rarity and price premium. The M5 CS (635 PS) is the ultimate expression of the F90 — lighter, sharper, and more powerful, but it's a collector's piece.”

Who it's for: For most buyers, the Competition offers the best balance of performance, value, and running costs.

BMW M5 F90
Ownership Economics

EngineTypical MileageCommon Major FailureRepair Cost (Specialist)Replacement Cost (Recon)Ownership Verdict
S63B44T4 (M5)30k–60kCoolant expansion tank, oil leaks£800–£2,000£6,000–£12,000
High Performance, High Cost -budget for preventative maintenance
S63B44B (M5 Competition)30k–60kCoolant expansion tank, oil leaks£800–£2,500£6,500–£13,000
Sweet Spot -more power, similar running costs
S63B44B (M5 CS)20k–40kCoolant expansion tank, oil leaks£1,000–£3,000£8,000–£15,000
Ultimate F90 -rare, expensive, collectable

The F90 M5 rule

A £6,000–£13,000 S63 recon against a £30,000–£60,000 M5 sits at 10–43% of the car's value -well within our 70% BMW scrap threshold. For a Competition at £35,000+, a £6,500–£13,000 recon is 19–37% -a repair decision, not a scrap question. For a CS at £60,000+, a £8,000–£15,000 recon is 13–25% -a manageable cost for a collector's car. These are high-value performance cars; the replacement cost is a manageable proportion of the vehicle's worth. But beware of the coolant expansion tank -budget for a billet aluminium replacement if buying used.

Key Takeaways

  • Which F90 M5 Costs Least To Own?

    Standard M5 -lowest power, slightly cheaper parts, but still expensive.

  • Which F90 M5 Costs Most To Own?

    M5 CS -rare parts, specialist labour, eye-watering costs.

  • Which F90 M5 Is Best Value?

    M5 Competition -the sweet spot in the range, more power than standard, similar running costs.

Common Problems

F90 M5
Engine Replacement Costs -By Engine and Condition

Diesel & Petrol Lineup

Scope note: All variants listed are F90 only. The M5 Competition was introduced in 2018, and the M5 CS in 2021. The LCI facelift (2020) brought revised styling and iDrive 7 but no major mechanical changes to the engine. The F90 was the last purely petrol-powered M5 -the G90 successor uses a hybrid V8.

Market Intelligence

Most Requested Engines (2025)

    Most Requested Variants

      Average Replacement Cost

      Most Common Failures

        FAQ

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