Mercedes G550Engine Rebuild— From £4,500
Specialist Mercedes G550 engine rebuilds and replacements, with registration-based engine matching, nationwide recovery and a 12-month unlimited-mileage warranty
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 G550 Engine
Vehicle
Mercedes G550
Model
G-Class
Variant
G550
Fuel
Petrol V8 (naturally aspirated) / Petrol V8 (twin-turbo)
Engine
M113, M273 or M176
Capacity
5.0L–5.5L / 4.0L
Generation
W463 (pre-2018) · W463a (2018–present)
Rebuild From
£4,500
Not sure which engine you have?
The G550 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 G550Engine Rebuild Price
Starting From £4,500
Engine Code
M113Rebuild From
£4,500
Generation
W463 (pre-2018)
Engine Code
M273Rebuild From
£4,500
Generation
W463 (pre-2018)
Engine Code
M176Rebuild From
£6,500
Generation
W463a/W465 (2018–present)
Exact price depends on condition and parts required — submit your reg for a fixed-price quote.
Mercedes G550 Oil Leaks & Coolant System Wear (M256 I6)
The M256 is a sophisticated 3.0-litre inline-six with an integrated starter-generator and electric auxiliary compressor — 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.
Because the G550 uses a completely different engine family from the V8 M178 fitted to the G-Class 63 and GT 63 S, parts and rebuild specifications don't cross over between them.
Source: Established M256 specialist pattern — timing chain, bearing and gasket wear across integrated-starter-generator inline-six units.
Mercedes G550ENGINE OPTIONS
Every G550 is different. That's why we offer the right solution for your engine, your car and your budget.
REBUILDING YOUR G550 ENGINE
We rebuild the engine your G550 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 G550 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 G550 ENGINES
Restoring your existing engine to full working condition rather than replacing it outright. Our rebuild service covers this.
Learn moreREMANUFACTURED G550 ENGINES
Built to original specification with updated components. That's consistent with what our rebuild service delivers on the M256.
Learn moreREPLACEMENT G550 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 G550 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 G550, 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 G550 rebuild looks like.
Mercedes G550 ENGINE REBUILD PROCESS
WHAT MERCEDES G550 OWNERS SAY
WE COVER YOUREXACT VEHICLE
Enter your registration below and we'll confirm your G550 has the M256, along with an exact rebuild price.
WHY MERCEDES G550 OWNERS CHOOSE US
Engine matched using VIN or registration number — confirms M113/M273 vs M176 before you're quoted
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 No widely-reported engine issue for this variant — we still recommend a full inspection before any long journey.
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 G550
RECOVERY
Mercedes G-Class 63
DIAGNOSTICS
Mercedes G-Class
STRIPPED ENGINE
Mercedes G-Class S
TIMING CHAIN REPLACEMENT
Mercedes G550
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 G550 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 G550 ENGINE
The G550 has been part of the G-Class range since the W463 era, and across its generations has used three different V8 engines — from the earlier M113 and M273 naturally aspirated units through to today's M176 twin-turbo. The pre-2018 W463 G550 used a naturally aspirated 5.0L–5.5L V8 (either the M113 or M273 depending on the exact year), while the current W463a generation (2018–present) uses the M176 4.0L twin-turbo V8 — a different unit entirely, shared with the S-Class S560 and S580. Knowing which one your car has matters, because the components, the rebuild specifics and the price tier differ between them — which is exactly why we confirm your exact engine by registration before quoting.
We continue to rebuild and replace M256 engines for every G550 on the road.
MERCEDES G550 ENGINE CODES
M113 (W463, pre-2018)
A 5.0L naturally aspirated V8 fitted to the G550 in earlier W463 generations. No specific known issue confirmed for this application. We service it to the same standard as our other V8 rebuilds, replacing timing chains, bearings and gaskets as standard.
Check Your M113 G550M273 (W463, pre-2018)
A 5.5L naturally aspirated V8 fitted to the G550 in later pre-2018 W463 models. No specific known issue confirmed for this application. We service it to the same standard as our other V8 rebuilds, replacing timing chains, bearings and gaskets as standard.
Check Your M273 G550M176 (W463a/W465, 2018–present)
The current 4.0L twin-turbo V8, fitted from 2018. This is the same M176 family used in the S-Class S560 and S580 — worth cross-checking that finding for any known patterns. We replace timing chains, valve seals, coolant components and bearings as standard on every rebuild.
Check Your M176 G550MERCEDES G550 ENGINE COMPATIBILITY
Because the G550 spans three distinct V8 engines across generations, fitting the wrong replacement — or assuming an M113 or M273 part will work on an M176 car — risks a compatibility problem that's expensive to unpick. Before we quote or supply anything, we confirm:
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 G550 ENGINES BY YEAR
From the R190's launch in 2023, the G550 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 G550 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 G550 MODEL YEAR:
Mercedes G550
Pre-2018 Engine Rebuild
Mercedes G550
2018 Engine Rebuild
Mercedes G550
2019 Engine Rebuild
Mercedes G550
2020 Engine Rebuild
Mercedes G550
2021 Engine Rebuild
Mercedes G550
2022 Engine Rebuild
Mercedes G550
2023 Engine Rebuild
Mercedes G550
2024 Engine Rebuild
Mercedes G550
2025 Engine Rebuild
Mercedes G550
2026 Engine Rebuild
If your registration year isn't listed above, get in touch — we'll confirm availability directly against your reg.
MERCEDES G550 ENGINE COSTS
A Mercedes G550 engine rebuild starts from
£4,500
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 G550 ENGINE SIZES
• Mercedes G550 3.0 Litre Engine (M256, I6)
MERCEDES G550 FUEL TYPES
• Mercedes G550 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.