Mercedes‑Benz SLS AMG Engine Replacement — Compare Prices & Get Quotes
Get quotes today from trusted UK Mercedes‑Benz SLS AMG specialists. Compare reconditioned, rebuilt and used 6.2‑litre naturally aspirated V8 engines — M159 variants across the C197 and R197 generations — supply & fit available nationwide.
The SLS AMG THROUGH TIME — Era Map
Four generations. Four eras. One guide to reliability, costs and what really matters.
Era Note
Handbuilt 6.2L NA V8 — 571–591 hp, 650 Nm; dry‑sump lubrication; M159 features improved valvetrain over M156; oil starvation and VVT actuator wear are the critical watch items
Why use this era map?
This table is the single source every other section on this page matches — Sections 2, 4 and 6 reference it rather than restating conflicting figures.
Mercedes‑Benz SLS AMG Engine Replacement Costs
Figures above reflect current SLS AMG replacement costs. The GT and Black Series variants typically sit at the higher end of the range. See the Era Map above for generation‑specific pricing.
Labour estimate: Fitting an SLS AMG engine typically takes 14–18 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer). The front‑mid engine layout and transaxle configuration increase labour complexity.
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SLS AMG — Repair, Buy, or Replace?
Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.
Can It Be Repaired?
Buying This SLS AMG? Check These First
Buy If
- Full Mercedes‑AMG service history with regular oil changes (critical for M159 longevity)
- Dry‑sump scavenge pumps upgraded per AMG Technical Bulletin TSB-AMG-11-03
- Camshaft phaser bolts replaced with ARP (or upgraded) units
- No oil leaks around valve covers or camshaft solenoid covers
- No unusual rattling or ticking from the engine
- Recent crankcase breather valve replacement
- 2012+ GT model with the 591 hp upgrade
- Black Series (2014) — the ultimate SLS with even more track‑focused engineering
Avoid If
- No service history — the M159 is unforgiving of neglect
- Oil starvation history or bearing replacement — catastrophic failure may be imminent
- Camshaft phaser bolt failure symptoms — budget for engine‑out repair
- Oil leaks around the engine — gaskets may be failing
- Unusual rattling or ticking — valve train or phaser issues likely
- Transmission jerking at low speeds — DCT may need costly attention
- Any history of engine failure or major repairs without documentation
Closing Verdict
The SLS AMG is Mercedes‑Benz's modern Gullwing — a handcrafted supercar powered by the M159 6.2‑litre naturally aspirated V8. The engine is a masterpiece, delivering up to 591 hp and 650 Nm torque, with a 7,500 rpm redline and a soundtrack that defines the AMG brand. The M159 features significant improvements over the M156, including dry‑sump lubrication for track use, new camshafts, headers, and improved valve buckets with an anti‑friction coating. However, the SLS demands careful ownership. Common issues include oil starvation during aggressive cornering (addressed by AMG Technical Bulletin TSB-AMG-11-03), camshaft phaser bolt failure (factory bolts are torque‑to‑yield and weak), oil leaks from valve cover gaskets, and crankcase breather valve failure. The 7‑speed DCT can be jerky at low speeds. With typical SLS values ranging from £80,000 to £200,000+, an engine replacement is a major financial commitment — a well‑maintained example with upgraded dry‑sump components, ARP phaser bolts, and full service history is the safest choice. The SLS is a future classic and worth preserving.
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Buying Checklist
Before you buy a used Mercedes‑Benz SLS AMG (or before you commit to an engine replacement), check these:
Dry‑Sump System — Confirm AMG Technical Bulletin TSB-AMG-11-03 upgrades completed (scavenge pumps and baffled sumps) — see the map above
Cold Start — Listen for rattling or ticking (camshaft phaser bolt or valve train warning)
Oil Leaks — Check around valve covers and camshaft solenoid covers for leaks
Service History — Including regular oil changes (critical for M159 longevity)
Camshaft Phaser Bolts — Check if upgraded to ARP or similar high‑strength bolts
Crankcase Breather — Check for replacement at 60,000 miles
Transmission — Test DCT at low speeds; any jerkiness may indicate issues
Engine Warning Light — Have codes read; unresolved issues may indicate phaser, breather or sensor problems
MOT History — Check for emissions‑related failures
Gullwing Doors — Check operation and seals; expensive to repair
Buy smart. Drive with confidence.
A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.
Engine Codes
This table's rows match Section 1B's Era Map exactly.
M159.980 (6.2L V8)
Technical Specs
M159.980 — SLS AMG→ Compare SLS AMG engine prices for your SLS
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Market Intelligence
Most Common Failure
Oil starvation during aggressive cornering and camshaft phaser bolt failure — the most frequent SLS AMG engine enquiries
Average Enquiry Mileage
20,000
–40,000 miles
[PATTERN DATA]
Average Replacement Cost
£10,000
–£12,000 reconditioned, supply only
[PLACEHOLDER]
Most Requested Engine Code
M159.980
[PATTERN DATA]
Peak Enquiry Season
Year‑round — supercar maintenance is a constant consideration
Regional Demand
PATTERN DATA
Regional Demand Breakdown
Frequently Asked Questions
All prices are indicative UK market ranges based on historical quote data from our network of engine specialists. Actual costs vary by variant, engine condition, damage severity and workshop location. Use our free comparison tool to get tailored quotes. Every engine supplied through EnginesMarket carries a minimum 12‑month unlimited‑mileage warranty — always confirm terms with your chosen supplier.
Why UK Mercedes‑Benz SLS AMG Owners Trust MercedesEngine.uk
Trusted SLS AMG Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real SLS AMG owners, as part of the Engine Finders network, covering the M159.980 across the C197 and R197 generations.
Compare SLS AMG Engine Replacement Companies
see prices, warranty terms and supply & fit options side‑by‑side before you commit. We cover the 6.2‑litre naturally aspirated V8 specifically, with specialists who understand the oil starvation vulnerabilities, camshaft phaser bolt issues, oil leak concerns, and the unique requirements of the SLS.
UK Engine Replacement Services for SLS AMG
supply‑only or full supply & fit available nationwide, covering every generation of this badge since 2010, with a 12‑month warranty as standard across our network.
Find the best Mercedes‑Benz SLS AMG engine replacement UK owners rely on. Compare prices from trusted specialists on EnginesMarket today and keep your Gullwing on the road with confidence.
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No hidden fees
No Obligation
Get quotes with zero pressure
UK Specialists
20+ vetted experts
12-Month Warranty
As standard
Nationwide Delivery
Supply & fit available