BMW S63 Engine — 4.4 V8 Twin-Turbo
Used & Reconditioned for Sale
S63B44, S63B44TÜ, S63B44TÜ2, 4.4 V8 Twin-Turbo, M5 V8 Engine, M6 V8 Engine, X5M/X6M Engine, M8 V8 Engine
Displacement
Fuel
Production
Fits BMW M5, M6, M8, X5M, X6M models — also known as S63B44, S63B44TÜ, S63B44TÜ2. Verified fitment, fixed prices, UK delivery.
Displacement
Fuel
Production
Configuration
Applications
Verified Fitment
Checked by registration
12-Month Warranty
On reconditioned units
UK Nationwide Delivery
2-4 working days
14-Day Returns
Uninstalled, full refund
Buy a S63 Engine for Your Vehicle
Our S63 engine hub covers 6 distinct application groups, each configured and priced for its specific vehicle — from E‑generation M5/M6 and X5M/X6M to F‑generation models, current M5/M8, and latest X5M/X6M. Every group has a dedicated listing page for your chassis.
Application availability is being added. Contact us to confirm a compatible engine.
Full S63 Compatibility
Use the table below to match your BMW M‑model chassis code and production year to the correct S63 application group. Each row links to its unit listing, and you can confirm fitment instantly with our registration checker.
| Model | Chassis | Variants | Years | Config. | Unit page |
|---|
Confirm your exact specification with the registration checker above.
S63 Engine Prices
Our S63 prices are grouped by vehicle application to reflect chassis‑specific fitment and specification differences. Choose your group below — all prices are fixed, with no hidden fees.
| Application | Used from | Reconditioned from |
|---|
Our S63 prices are grouped by vehicle application to reflect chassis‑specific fitment and specification differences. Choose your group below — all prices are fixed, with no hidden fees.
What You Get with a S63 Engine
What You Get with a S63 Engine
What's included
Complete long-block assembly; Renewed timing chains, tensioners and guides (recon); Rebuilt cylinder head with new valve stem seals (recon); Tested-before-dispatch; 6–12 month warranty
Not included
- Turbochargers (reusable if sound — S63 cross-bank twin-turbo setup)
- Fuel injectors and high-pressure fuel pump
- Ancillaries (alternator, starter, A/C compressor)
- Fitting and installation
Used or reconditioned?
Used units are widely available for E-generation (2009–2013) and F-generation (2013–2018) models, offering value for earlier S63 applications. Reconditioned units are more commonly selected for current-generation models (F90 M5, M8, G05/G06 X5M/X6M) and high-output Competition variants, where the replacement cost justifies the premium. The BMW S63 is M GmbH's twin-turbo V8, powering the most potent M models from 2009 to the present. Replacement demand is driven by the S63's high-performance nature and age-related wear across two generations — every unit we supply has its turbochargers, timing chains, and VANOS components inspected as standard.
S63 Engine Buying FAQs
Answers to common fitment, condition, warranty and delivery questions.
A:A: The S63 is fitted to BMW M5 (E60, F10, F90, G90), M6 (E63, F06/F12/F13), M8 (F91/F92/F93), X5 M (E70, F85, G05), X6 M (E71, F86, G06), and Alpina B5/B7.
A:A: The S63 is known as S63B44 (original), S63B44TÜ (Technical Update, 2013–2018), and S63B44TÜ2 (second Technical Update, 2018–present). It is also referred to as "4.4 V8 Twin-Turbo" or by application (M5 V8, M6 V8, etc.).
A:A: The S63 is BMW M's high-performance twin-turbo V8, with bespoke turbochargers, engine management, internal components, and compression ratios. The N63 is the standard BMW V8 twin-turbo fitted to non-M models (550i, 650i, X5 xDrive50i, 750i). They are different engines — keep separate, not interchangeable.
A:A: Use our registration checker or verify against your V5C and engine code stamp. S63 engines carry S63B44, S63B44TÜ, or S63B44TÜ2 on the cylinder block. Check your chassis code against our compatibility matrix — all M-cars with V8 twin-turbo since 2009 use S63 (pre-2010 M5/M6 used S85 V10).
A:A: All S63 units come with a 6–12 month warranty (varies by condition), with UK nationwide palletised delivery and a free compatibility check before dispatch.
Find Your S63 Engine by Registration
Enter your vehicle registration to confirm fitment instantly and see available S63 units at fixed prices. No registration? Use our chassis code checker or contact our team.