Mercedes G500 4x4²Engine Rebuild— From £3,200
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Rated Mercedes Engine Specialists — 1,800+ Engines Rebuilt
Specialist technicians with 10-15 years of experience
12 Month Unlimited-Mileage Warranty
Nationwide Recovery
Free Engine Matching by Registration
M256 Specialists
Your Mercedes G500 4x4² Engine
Vehicle
Mercedes G500 4x4²
Model
G-Class
Variant
G500 4x4²
Fuel
Petrol Twin-Turbo
Engine
M157
Capacity
5.5L V8
Generation
W463 (pre-2018)
Rebuild From
£6,500
Not sure which engine you have?
The G500 4X4² uses the M256 3.0-litre inline-six mild-hybrid engine — enter your registration below and we'll confirm your exact spec before you get a quote.
DVLA & VIN verified
100% secure & private
No obligation quote
Mercedes G500 4x4²Engine Rebuild Price
Starting From £6,500
Engine Code
M256Rebuild From
£3,200
Generation
R190 (2023–present)
Exact price depends on condition and parts required — submit your reg for a fixed-price quote.
Mercedes G500 4x4² M157 Valve Seal & Coolant Wear
If your G500 4x4² has the M157 twin-turbo V8 — that's the W463 generation — valve seal and coolant system wear is a well-documented pattern on this AMG-sourced engine. We replace valve seals, coolant components, and timing chains as standard on every M157 rebuild.
*include_in_hero_hook: yes for M157 — Source: established AMG specialist pattern, same M157 family confirmed elsewhere in the Mercedes G-BRF, per VRF-mercedes-g-class.md. The G500 4x4² exclusively uses the M157 engine.*
Source: established AMG specialist pattern, same M157 family confirmed elsewhere in the Mercedes G-BRF, per VRF-mercedes-g-class.md. The G500 4x4² exclusively uses the M157 engine
Mercedes G500 4x4²ENGINE OPTIONS
Every G500 4X4² is different. That's why we offer the right solution for your engine, your car and your budget.
REBUILDING YOUR G500 4X4² ENGINE
We rebuild the engine your G500 4X4² already has instead of selling you a used engine of unknown history — strip it down, pressure-test it, and replace every worn or damaged component (timing chains, bearings, water pump, gaskets) with updated OEM parts. Near-new performance with a 12-month unlimited-mileage warranty.
From £3,200RECONDITIONED G500 4X4² ENGINES
A full strip-down, inspection and replacement of worn parts rather than a straight swap. If that's what you're after, our rebuild service is exactly that.
Learn moreREFURBISHED G500 4X4² ENGINES
Restoring your existing engine to full working condition rather than replacing it outright. Our rebuild service covers this.
Learn moreREMANUFACTURED G500 4X4² ENGINES
Built to original specification with updated components. That's consistent with what our rebuild service delivers on the M256.
Learn moreREPLACEMENT G500 4X4² ENGINES
If your existing engine is beyond economical repair, we offer complete engine replacement and fitting – sourced and fitted by our team, with the same 12-month warranty.
Learn moreUSED G500 4X4² ENGINES
Matched low-mileage used engines for when time is critical. We source and fit these too, but most owners choose a rebuild once they understand the compatibility risks.
Learn moreNOT SURE WHICH OPTION IS RIGHT FOR YOU?
Enter your registration below and we'll confirm your M256 and talk you through the best solution for your G500 4X4², honestly.
Ask About Your Options
OUR WORKSHOP
01RECOVERY COLLECTION
02M256 ENGINE STRIPPED FOR REBUILD INSPECTION
03VALVE COVERS & COOLANT COMPONENT WORK
04TECHNICIANS AT WORK
05ENGINE TESTING (RIG)
06COMPLETED & READY FOR REFIT
Real photos from our workshop — not stock imagery. This is what a genuine Mercedes G500 4x4² rebuild looks like.
Mercedes G500 4x4² ENGINE REBUILD PROCESS
WHAT MERCEDES G500 4X4² OWNERS SAY
WE COVER YOUREXACT VEHICLE
Enter your registration below and we'll confirm your G500 4X4² has the M256, along with an exact rebuild price.
WHY MERCEDES G500 4X4² OWNERS CHOOSE US
Engine matched using VIN or registration number
Genuine specialist workshop — not a broker
Specialist technicians with 10-15 years of experience
We don't swap your engine for an unknown used unit
Nationwide recovery, workshop rebuild
12 month unlimited-mileage warranty
All engine ancillaries serviced as part of the rebuild
Trade & public enquiries welcome
Dedicated advisor from quote to fit
OUR MOST RECENTMERCEDES RECOVERIES & REBUILDS
Real vehicles brought into our workshop. Open bonnets, stripped blocks, and cars ready for collection — this is what genuine engine work looks like.
Mercedes G500 4x4²
RECOVERY
Mercedes G-Class 63
DIAGNOSTICS
Mercedes G-Class
STRIPPED ENGINE
Mercedes G-Class S
TIMING CHAIN REPLACEMENT
Mercedes G500 4x4²
IN FOR REBUILD
Mercedes G-Class C
REBUILD IN PROGRESS
HOW IT WORKS
SEND YOURREGISTRATION
RECEIVE YOURFIXED-PRICE QUOTE
WE RECOVERYOUR CAR
REBUILD &REFIT
Most G-Class models are recovered within a few hours of booking. Most rebuilds are completed within 3-5 working days.
Workshop slots fill up fast — book your recovery today.
LOOKING FOR A USED ORREPLACEMENT ENGINEINSTEAD?
We supply low-mileage, VIN-matched used units too, and offer full replacement and fitting. However, most G500 4X4² owners choose a rebuild once they realise it removes compatibility risk and works out more cost-effective over the life of the car.
Enter your reg below — we'll show you every option, honestly.
ABOUT THE MERCEDES G500 4X4² ENGINE
The G500 4x4² is a special-edition version of the pre-2018 W463 G-Class, fitted with the M157 5.5-litre twin-turbo V8 — the same engine used in the contemporary G63 AMG. It was a limited-production model, designed as an even more capable off-road variant with portal axles and a significantly increased ride height. The M157 engine is shared with other performance Mercedes models of that era, known for its strong power delivery and, like other AMG-sourced V8s, a pattern of valve seal and coolant system wear over time. The G500 4x4² is no longer in production, but we continue to rebuild and replace engines for every one still on the road.
We continue to rebuild and replace M256 engines for every G500 4X4² on the road.
MERCEDES G500 4X4² ENGINE CODES
M256 (R190, 2023–present)
A 3.0-litre inline-six petrol mild-hybrid engine fitted to the G500 4X4² from 2023 to present. The M256 features an integrated starter-generator (ISG) and electric auxiliary compressor, making it a more modern and efficient design than the older M276 V6. We replace timing chains, bearings, water pump and gaskets as standard on every M256 rebuild.
Check Your M256 G500 4X4²MERCEDES G500 4X4² ENGINE COMPATIBILITY
Because the G500 4x4² is a special-edition model, ensuring the correct engine and component compatibility is crucial. Before we quote or supply anything, we confirm: - Your exact engine code (M157) via registration or VIN - The specific specifications of the G500 4x4² package - Drivetrain and ancillary specification - Any electronics or ECU considerations specific to your exact build
Your exact engine code (M256) via registration or VIN
Your generation (R190)
Drivetrain and ancillary specification
Any electronics or ECU considerations specific to your exact build
This is why we always start with your registration rather than a generic G-Class quote — it protects you from paying for parts that don't fit your actual car.
MERCEDES G500 4X4² APPLICATIONS BY GENERATION
Generation
Chassis
Years
Engine Code
Fuel
MERCEDES G500 4X4² ENGINES BY YEAR
From the R190's launch in 2023, the G500 4X4² has used the M256 3.0-litre inline-six mild hybrid throughout. If you're unsure of your exact spec, we'll confirm it before you book.
The M256 has been fitted to every G500 4X4² since launch — if your registration year isn't listed above, get in touch and we'll confirm availability directly against your reg.
WE COVER EVERY MERCEDES G500 4X4² MODEL YEAR:
Mercedes G500 4x4²
2015 Engine Rebuild
Mercedes G500 4x4²
2016 Engine Rebuild
Mercedes G500 4x4²
2017 Engine Rebuild
Mercedes G500 4x4²
2018 Engine Rebuild
If your registration year isn't listed above, get in touch — we'll confirm availability directly against your reg.
MERCEDES G500 4X4² ENGINE COSTS
A Mercedes G500 4x4² engine rebuild starts from
£6,500
A full replacement engine and fitting service is also available. Exact pricing depends on the condition of your existing engine and the parts required — submit your registration for a fixed-price quote within 30 minutes.
12 MONTH
UNLIMITED-MILEAGE
WARRANTY
MERCEDES G500 4X4² ENGINE SIZES
• Mercedes G500 4x4² 3.0 Litre Engine (M256, I6)
MERCEDES G500 4X4² FUEL TYPES
• Mercedes G500 4x4² Petrol Mild Hybrid Engine Rebuilds
RELATED MERCEDES G-CLASS VARIANTS
Most Mercedes G-Class engine rebuilds are completed within 3-5 working days.
Nationwide recovery and collection available for all G-Class models.