Mercedes‑Benz G‑Class G65 AMG Engine Replacement — Compare Prices & Get Quotes
Get quotes today from trusted UK Mercedes‑Benz G65 AMG specialists. Compare reconditioned, rebuilt and used 6.0‑litre twin‑turbo V12 engines — M279.982 variants across the W463 generation — supply & fit available nationwide.
The G65 AMG THROUGH TIME — Era Map
Four generations. Four eras. One guide to reliability, costs and what really matters.
Era Note
Handcrafted AMG 6.0L V12 biturbo — 621–630 hp, 738 lb‑ft; ignition coils, coil packs and cooling system are the primary 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 G65 AMG Engine Replacement Costs
Figures above reflect current G65 AMG replacement costs. This badge spans only one engine era — see the Era Map above.
Labour estimate: Fitting a G65 AMG engine typically takes 16–22 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer).
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G‑Class G65 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 G65 AMG? Check These First
Buy If
- Ignition coils replaced recently (full set of twelve) — heat exposure is the main killer
- Full Mercedes service history with regular oil changes (critical for timing chain longevity)
- No cold‑start rattling (timing chain tensioner health)
- Turbo bypass valves functioning correctly (no boost loss or unusual noises)
- Cooling system recently serviced (hoses, coolant, water pump)
- Post‑2015 model with the 630 PS upgrade
Avoid If
- Misfires or rough running — ignition coils may be failing (£2,000 repair)
- Cold‑start rattling and no timing chain history — budget for chain work
- No service history — the M279 is unforgiving of neglect
- Unusual turbo noises or power loss — bypass valves or turbo issues likely
- Oil leaks or coolant loss — seals and cooling system may be degrading
- Any history of ignition or turbo issues without documented repairs
Closing Verdict
The G65 AMG is the pinnacle of the W463 G‑Class — a handcrafted 6.0‑litre V12 biturbo SUV producing up to 630 hp and 738 lb‑ft of torque. With only 28,000 miles on a 2016 example, it remains a rare and desirable machine. The M279 V12 is derived from the legendary M275 family that powered the S 65 AMG, CL 65 AMG, and even the Pagani Huayra. However, the engine generates immense heat from the twin‑turbochargers, and ignition coils are a known weakness — the V12 has twelve individual coils that can fail due to heat exposure. Other concerns include turbo bypass valve leaks, timing chain tensioner wear, and cooling system degradation. With typical G65 AMG values ranging from £60,000 to £120,000+, an engine replacement is a major financial commitment — but the G65 AMG is a collector's piece that rewards careful ownership. A well‑maintained example with documented ignition coil and cooling system history is the safest choice.
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Buying Checklist
Before you buy a used Mercedes‑Benz G‑Class G65 AMG (or before you commit to an engine replacement), check these:
Ignition System — Check for smooth idle; any misfires may indicate coil failure — see the map above
Cold Start — Listen for rattling or clattering (timing chain tensioner warning)
Turbo Health — Test acceleration; any lag, "whirring" noises, or power loss indicates bypass valve or turbo issues
Service History — Including regular oil changes (critical for timing chain longevity)
Cooling System — Check for coolant leaks, sweet smells, or overheating — V12 generates immense heat
Oil Leaks — Check around valve covers and seals for leaks
Engine Warning Light — Have codes read; unresolved issues may indicate ignition, timing, turbo or sensor problems
MOT History — Check for emissions‑related failures (V12 emissions are stringent)
Transferable Warranty — Check if the vehicle still has a transferable warranty — G65 repairs are expensive
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.
M279.982 (6.0L V12 biturbo)
Technical Specs
M279.982 — G65 AMG→ Compare G65 AMG engine prices for your G‑Class
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Market Intelligence
Most Common Failure
Ignition coil and coil pack failure — heat exposure from twin‑turbo V12 is the primary cause
Average Enquiry Mileage
30,000
–60,000 miles
[PATTERN DATA]
Average Replacement Cost
£10,000
–£12,000 reconditioned, supply only
[PLACEHOLDER]
Most Requested Engine Code
M279.982
[PATTERN DATA]
Peak Enquiry Season
Year‑round — V12 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 G65 AMG Owners Trust MercedesEngine.uk
Trusted G65 AMG Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real G65 AMG owners, as part of the Engine Finders network, covering the M279.982 V12 across the W463 generation.
Compare G65 AMG Engine Replacement Companies
see prices, warranty terms and supply & fit options side‑by‑side before you commit. We cover the 6.0‑litre V12 biturbo specifically, with specialists who understand the ignition coil vulnerabilities, turbo bypass valve issues, timing chain concerns, and the unique requirements of the G65 AMG.
UK Engine Replacement Services for G65 AMG
supply‑only or full supply & fit available nationwide, covering every generation of this badge since 2012, with a 12‑month warranty as standard across our network.
Find the best Mercedes‑Benz G65 AMG engine replacement UK owners rely on. Compare prices from trusted specialists on EnginesMarket today and keep your V12 G‑Class 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