BMW M4 S55/S58 Performance Engine ReplacementRebuilt & Options

£9,500-£16,500 for a rebuilt S55 (F82/F83) and £14,500-£24,000 for a rebuilt S58 (G82/G83) supply-only. Specialist prices are typically 30-40% below main dealer quotes for the same work.

• S55 rebuilt engines (2014-2020): £9,500-£14,000 from specialist suppliers
• S58 rebuilt engines (2021-present): £14,500-£22,000 supply-only
• Add £850-£1,500 for professional supply & fit installation
• Main dealer replacement typically £17,000-£25,000 for S55 and £20,000-£30,000 for S58

Yes - it's the Achilles' heel of the S55. When the crank hub spins, it throws engine timing off, often causing pistons to hit valves. Prevention costs £2,000-£3,500; full engine replacement costs £9,500+.

• Crank hub failure can destroy the engine with no warning signs
• Tuned cars face significantly higher risk than stock vehicles
• Keyed or pinned hub upgrade permanently eliminates the failure risk
• Replacement S55 engines from specialists include upgraded hubs as standard

Yes - the S58 uses a closed-deck block and forged internals that handle far more abuse. BMW drift cars run 1,000hp through stock S58 crankshafts with minimal wear after years of racing .

• Closed-deck crankcase eliminates cylinder wall flex under high boost
• Forged crankshaft and connecting rods from factory
• Crank hub design is more secure than S55 (fewer reported failures)
• 350-bar direct injection and 3D-printed cylinder head core

Crank hub failure dominates replacement enquiries, followed by rod bearing wear (50k-90k miles) and turbocharger oil seal failure around 54k-70k miles. Each can destroy the engine if ignored.

• Crank hub slip - most searched M4 engine problem in the UK
• Rod bearing wear - track-driven cars at highest risk
• Turbo failure - white smoke from exhaust indicates oil seal failure
• Replacement turbos cost £1,300-£2,000 each from specialists vs £7,000-£8,000 from BMW

Replace it. An M4 with a fresh rebuilt engine is worth £18,000-£35,000 depending on year and variant. A quality rebuilt S55 costs £9,500-£14,000 - far less than the £20,000+ depreciation on a replacement car.

• F82 M4 values remain strong - replacement makes financial sense
• Rebuilt engines include upgraded components (crank hub, bearings) to prevent repeat failure
• Specialist rebuilds come with 12-24 month warranty for peace of mind
• Scrapping a salvageable M4 loses the car's residual value completely

Well-maintained S55 engines typically reach 100k-150k miles. S58 engines are newer but expected to exceed this. Crank hub failure can strike at any mileage - it's mileage-independent and driven by driving style.

• Regular oil changes every 5k-6k miles extend S55 bearing life
• Track use and tuning significantly reduce engine lifespan
• Crank hub risk doesn't increase with mileage - it's unpredictable
• Preventative hub upgrade is the only guaranteed protection

Yes - many specialists offer upgraded internals during replacement. Stage 1 builds with forged rods and upgraded turbos are common. Stock S58 internals handle 1,000hp without modification .

• Upgraded crank hub (keyed/pinned) eliminates S55's main weakness
• Forged pistons and rods available for high-power builds
• S58 closed-deck block supports 800+hp on stock internals
• Aftermarket turbos and charge coolers available during replacement

Rebuilt engines are stripped and reassembled with new wear parts (typically £9,500-£14,000). Reconditioned means cleaned and tested with selective part replacement. Used engines are as-removed from donor cars (£4,500-£8,000).

• Rebuilt includes new bearings, seals, rings - often upgraded components
• Recon engines stop at inspection and replacement of failed parts only
• Used engines carry original factory weaknesses (crank hub, bearings)
• All EngineMarket rebuilt units include 12-month unlimited warranty

Yes - most specialist suppliers offer fitting through their garage networks. Budget £850-£1,500 for professional installation including ISN coding, immobiliser synchronisation and full system testing.

• Supply & fit removes logistics and workshop sourcing hassle
• Includes all gaskets, fluids, filters and labour for installation
• ISN coding ensures ECU and immobiliser accept the replacement engine
• Single warranty point for both engine and labour

Check the engine block stamp (S55B30 for F82/F83, S58B30 for G82/G83), look at your V5C logbook, or enter your registration above for instant identification. Competition models use the same base codes but different ECU mapping.

• S55B30: F82/F83 M4 Coupe/Convertible 2014-2020 (425-444hp)
• S55B30T0: M4 GTS (493hp) and CS (454hp)
• S58B30: G82/G83 M4 2021-present (473-510hp)
• S58B30T0: M4 CSL (550hp) and CS (543hp)