Mercedes Benz SLS AMG 6.2 V8 Engine ReplacementCompare Prices & Get Quotes

Short summary: A rebuilt M159 engine for the SLS AMG costs £14,500-£41,000 supply-only depending on variant specification. Coupe and Roadster engines start around £14,500, GT variants £17,000-£25,000, GT Final Edition £19,000-£28,500, and Black Series £26,000-£41,000. Fitting adds £1,500-£2,500 depending on complexity - AMG V8 work requires specialist knowledge.

• SLS AMG Coupe (M159.970): rebuilt unit £14,500-£21,000; used engine from £8,500
• SLS AMG Roadster (M159.971): rebuilt unit £14,800-£21,500; used engine from £8,800
• SLS AMG GT (M159.972): rebuilt unit £17,000-£25,000; used engine from £10,000
• SLS AMG GT Final Edition (M159.973): rebuilt unit £19,000-£28,500; used engine from £12,000
• SLS AMG Black Series (M159.974): rebuilt unit £26,000-£41,000; used engine from £15,000
• M159 timing chain tensioner replacement: £2,800-£3,900 at specialist

Short summary: Blue smoke on cold starts and oil consumption exceeding 1 litre per 1,000 miles are the classic warning signs on the M159 engine. The original piston ring tension can lose elasticity under sustained high-temperature operation, allowing oil to bypass into the combustion chambers.

• Blue smoke from the exhaust on cold starts
• Oil consumption between services - monitor levels regularly
• Increased crankcase pressure
• If caught early, PCV refresh costs £1,200-£1,800 at specialist

Short summary: Early production SLS AMG models from 2010-2011 can experience timing chain tensioner wear causing cold start metallic rattling. The revised A1590500001 tensioner components resolve this issue. Later production M159 engines from 2012 onwards benefit from updated tensioner design.

• Metallic rattle on cold start below 55,000 miles - earliest warning
• Check engine light with timing correlation codes
• If caught early, tensioner replacement costs £2,800-£3,900 at specialist

Short summary: The M159 is fundamentally robust when properly maintained, though high-mileage examples commonly develop piston ring wear causing oil consumption and early production units experienced timing chain tensioner wear. Regular specialist servicing and addressing known TSB updates significantly extends engine lifespan for collector ownership.

• Hand-built AMG construction with individual builder plaque ensures precision assembly
• Piston ring wear typically emerges above 45,000 miles
• Revised timing tensioner resolves early 2010-2011 cold start rattle concerns
• Dry sump lubrication on GT variants requires specialist oil pressure calibration

Short summary: Properly maintained M159 engines routinely reach 100,000-150,000 miles before major work. Piston ring wear typically appears between 45,000-75,000 miles, while timing chain tensioner issues affect early 2010-2011 units from 30,000-55,000 miles.

• M159 (SLS AMG 6.2 V8): 100,000-150,000 miles with regular servicing
• Piston ring inspection recommended from 45,000 miles
• Timing chain tensioner inspection critical on 2010-2011 units
• Service interval is 10,000 miles or 12 months - use Mercedes-spec MB 229.5 oil

Short summary: Yes, if the SLS AMG is otherwise in good condition with no rust or major transmission faults. A rebuilt M159 costs £14,500-£41,000 - far less than replacing a £50,000-£85,000 vehicle. For Black Series and GT Final Edition variants, the higher value (£150,000-£200,000+) makes replacement even more financially justifiable. Investment-grade documentation, dyno certification, and unlimited warranty preserve provenance while restoring performance.

• SLS AMG Coupe/Roadster values: £50,000-£85,000 depending on condition
• SLS AMG GT values: £80,000-£120,000
• SLS AMG GT Final Edition values: £150,000+
• SLS AMG Black Series values: £200,000+
• Rebuilt engine with upgraded components fixes original weak points
• Supply & fit typically £16,000-£43,500 depending on engine code
• New engine includes 12-month unlimited mileage warranty