Mercedes-AMG GT 55 Engine Replacement - M177 4.0 Engines

Mercedes-AMG GT 55 Engines for Sale | Engine Finders

If you're looking for a reconditioned Mercedes-AMG GT 55 engine, a rebuilt M177 unit, or simply a reliable replacement for a worn-out Mercedes-AMG GT 55 M177 twin-turbo V8 engine, you're in the right place. The AMG GT 55 brings V8 power to the current four-door AMG GT range, sitting below the hybrid flagship GT 63 and above the six-cylinder GT 43 and GT 53. Engine Finders matches UK buyers searching for 'M177 engine for sale', 'reconditioned M177 price' or 'Mercedes-AMG GT 55 engine replacement cost' with vetted suppliers who carry the correct unit for your exact car — supply-only or supply-and-fit, used or professionally reconditioned, whichever suits your budget and timeline.

Mercedes-AMG GT 55 Replacement Engines

A replacement M177 engine for the Mercedes-AMG GT 55 is a significant purchase, so getting the exact code right matters more than the badge on the boot. This is the same M177 V8 family used across AMG's current performance range, including the C 63 and E 63 AMG, here fitted to the larger four-door AMG GT body. Whether you call it a rebuilt engine, a remanufactured unit, or a reconditioned replacement, the work involved is broadly the same: a full strip-down, inspection against factory tolerances, replacement of wear parts, and bench testing before it's fitted or dispatched to you.

AMG GT 55 Models & Engine Codes

The Mercedes-AMG GT 55 uses the M177 (4.0-litre V8, Petrol (twin-turbocharged)), fitted to AMG GT 55 4-Door Coupé (C192) across 2023 to present. The same M177 family, paired with plug-in hybrid assistance, powers the AMG GT 63 above this model — confirm whether your car has the standalone combustion engine or the hybrid application. Before ordering any used, reconditioned or rebuilt unit, confirm this code from your V5C or the number stamped on the engine block itself — the same badge can sometimes cover more than one engine across a model's production run, and getting this step right avoids an expensive mismatch.

Buy Used and Second-Hand Mercedes-AMG GT 55 Engines

Used M177 engines do come up for sale in the UK, generally sourced from donor or written-off Mercedes-AMG GT 55 cars. A used engine can look like the cheaper option at first glance, but once you've accounted for inspection, gaskets, ancillaries and the lack of a meaningful warranty, a professionally reconditioned or remanufactured M177 unit is often the better value over the life of the car.

Mercedes-AMG GT 55 Engines in Stock

We work with a UK-wide network of suppliers who carry reconditioned, rebuilt and remanufactured M177 engines for the Mercedes-AMG GT 55, along with used units where buyers prefer that route. Give us your registration and we'll confirm current stock, typical lead times, and whether supply-only or supply-and-fit makes more sense for your situation.

Warranty for Replacement Mercedes-AMG GT 55 Engines

Warranty terms for a replacement M177 engine are set individually by the supplier we match you with — typically around 12 months on a reconditioned or remanufactured unit. £9,000 is our approved M177 price, the same reference used across our C 63, E 63 and other M177-equipped pages. Reported output is around 476 PS. Always get the warranty length, what it covers, and the VAT and fitting basis confirmed in writing before you commit.

Mercedes-AMG GT 55 M177 Engine Problems & What to Check Before Buying

We have not found catalogue-grade documented issue reports specific to this application that we are prepared to publish here. We note this as general background for anyone researching a M177 replacement, not as a confirmed finding for any specific car — ask your supplier what inspection was carried out on the unit you're being quoted, and whether known wear points for this engine family were addressed during the rebuild.

What's Included in a Reconditioned Mercedes-AMG GT 55 M177 Engine

A genuine reconditioned or remanufactured M177 unit should include a full strip, clean and inspection against factory tolerances, replacement of gaskets, seals and wear items, and a bench test before it leaves the workshop. What's not always included — ancillaries like the turbo, injectors or auxiliary belt components, and whether the price is supply-only or supply-and-fit — varies by supplier, so ask for this in writing alongside your M177 engine quote rather than assuming it's covered.