Land Rover Range Rover D300/D350Engine Rebuild— From £2,800
Specialist Land Rover Range Rover D300/D350 engine rebuilds and replacements, with registration-based engine matching, nationwide recovery and a 12-month unlimited-mileage warranty
Rated Land Rover 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
Ingenium I6 Specialists
Your Land Rover Range Rover D300/D350 Engine
Vehicle
Land Rover Range Rover D300/D350
Model
Range Rover
Variant
D300/D350
Fuel
Diesel MHEV
Engine
AJ300D
Capacity
3.0L I6
Generation
L460 (2022–present)
Rebuild From
£2,800
Not sure which engine you have?
The Range Rover D300/D350 uses the AJ300D 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
Land Rover Range Rover D300/D350Engine Rebuild Price
Starting From £2,800
Engine Code
AJ300DRebuild From
£2,800
Generation
L460 (2022–present)
Exact price depends on condition and parts required — submit your reg for a fixed-price quote.
Land Rover Range Rover D300/D350 Oil Leaks & Coolant System Wear (AJ300D I6)
The AJ300D 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 AJ300D V6. We replace timing chains, bearings, water pump and gaskets as standard on every AJ300D rebuild.
Because the Range Rover D300/D350 uses a completely different engine family from the V8 M178 fitted to the Range Rover 63 and GT 63 S, parts and rebuild specifications don't cross over between them.
Source: Established AJ300D specialist pattern — timing chain, bearing and gasket wear across integrated-starter-generator inline-six units.
Land Rover Range Rover D300/D350ENGINE OPTIONS
Every Range Rover D300/D350 is different. That's why we offer the right solution for your engine, your car and your budget.
REBUILDING YOUR RANGE ROVER D300/D350 ENGINE
Most engine suppliers sell you a used engine of unknown history and hope it matches. We rebuild the engine your Range Rover D300/D350 already has instead — strip it down, pressure-test it, and replace every worn or damaged component (timing chain, injector seals, bearings and gaskets) with updated OEM parts. You get a near-new engine with a 12-month unlimited-mileage warranty, without the compatibility risk of an unknown used unit. This is the option most Range Rover D300/D350 owners choose, and it's the one we'd recommend for most situations.
RECONDITIONED RANGE ROVER D300/D350 ENGINES
"Reconditioned" is the term many owners search for when they mean the same thing as a rebuild — 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.
REFURBISHED RANGE ROVER D300/D350 ENGINES
Similarly, "refurbished" often describes the same process from a different angle — restoring your existing engine to full working condition rather than replacing it outright. Our rebuild covers this.
REMANUFACTURED RANGE ROVER D300/D350 ENGINES
Some owners specifically search for a "remanufactured" engine, expecting a unit rebuilt to original specification with updated components. That's consistent with what our rebuild service delivers on the AJ300D.
REPLACEMENT RANGE ROVER D300/D350 ENGINES
If your existing engine is beyond economical repair, we also offer full engine replacement and fitting — sourced and fitted by our team, with the same 12-month warranty.
USED RANGE ROVER D300/D350 ENGINES
In some cases, a matched low-mileage used engine is the right call — particularly if you need your car back on the road quickly and your existing engine's damage is extensive. We can source and fit these too, though most owners who ask about used engines end up choosing a rebuild once they understand the compatibility risk a used unit carries. Enter your reg below and we'll talk you through both options honestly.
NOT SURE WHICH OPTION IS RIGHT FOR YOU?
Enter your registration below and we'll confirm your AJ300D and talk you through the best solution for your Range Rover D300/D350, honestly.
Ask About Your Options
OUR WORKSHOP
01RECOVERY COLLECTION
02AJ300D 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 Land Rover Range Rover D300/D350 rebuild looks like.
Land Rover Range Rover D300/D350 ENGINE REBUILD PROCESS
WHAT MERCEDES Range Rover D300/D350 OWNERS SAY
WE COVER YOUREXACT VEHICLE
Enter your registration below and we'll confirm your Land Rover Range Rover D300/D350 has the AJ300D, along with an exact rebuild price.
WHY MERCEDES Range Rover D300/D350 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.
Land Rover Range Rover D300/D350
RECOVERY
Land Rover Range Rover D300/D350
DIAGNOSTICS
Land Rover Range Rover D300/D350
STRIPPED ENGINE
Land Rover Range Rover D300/D350
TIMING CHAIN REPLACEMENT
Land Rover Range Rover D300/D350
IN FOR REBUILD
Land Rover Range Rover D300/D350
REBUILD IN PROGRESS
HOW IT WORKS
SEND YOURREGISTRATION
RECEIVE YOURFIXED-PRICE QUOTE
WE RECOVERYOUR CAR
REBUILD &REFIT
Most Range Rover 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 Range Rover D300/D350 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 Land Rover Range Rover D300/D350 ENGINE
The Range Rover D300 and D350 are part of the L460 generation introduced in 2022, representing the current diesel mild-hybrid offering in the Range Rover line-up. Both badges use the same AJ300D — a 3.0-litre Ingenium inline-six diesel with mild-hybrid assistance. The D300 and D350 badges simply denote different power output tunes of the same engine, rather than different engine families. The Ingenium I6 is generally regarded by specialists as more reliable than the older TDV6/SDV6 units it replaced.
We continue to rebuild and replace AJ300D engines for every Range Rover D300/D350 on the road.
Land Rover Range Rover D300/D350 ENGINE CODES
AJ300D (L460 (2022–present))
A 3.0-litre inline-six diesel mild-hybrid fitted to the Range Rover D300 and D350 from 2022 onwards (L460 generation). The Ingenium I6 is broadly considered an improved design compared to its predecessor, with fewer documented catastrophic failures. Check Your AJ300D Range Rover D300/D350 → [link to quote form]
Check Your AJ300D Range Rover D300/D350Land Rover Range Rover D300/D350 ENGINE COMPATIBILITY
The AJ300D is the only diesel engine fitted to the L460-generation Range Rover D300 and D350. However, it's part of a broader engine family that includes petrol variants (AJ300P) and PHEV derivatives — so confirming your exact spec is still important before any work begins. Before we quote or supply anything, we confirm:
Your exact engine code (AJ300D) via registration or VIN
Your generation (L460)
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 Range Rover quote — it protects you from paying for parts that don't fit your actual car.
Land Rover Range Rover D300/D350 APPLICATIONS BY GENERATION
Generation
Chassis
Years
Engine Code
Fuel
L460
L460
2022–present
AJ300D
Diesel MHEV
Land Rover Range Rover D300/D350 ENGINES BY YEAR
Land Rover Range Rover D300/D350 has used the AJ300D throughout (L460 (2022–present)). If you're unsure of your exact spec, we'll confirm it before you book.
The AJ300D has been fitted to every Range Rover D300/D350 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 Land Rover Range Rover D300/D350 MODEL YEAR:
Land Rover Range Rover D300/D350
2022 Engine Rebuild
Land Rover Range Rover D300/D350
2023 Engine Rebuild
Land Rover Range Rover D300/D350
2024 Engine Rebuild
Land Rover Range Rover D300/D350
2025 Engine Rebuild
Land Rover Range Rover D300/D350
2026 Engine Rebuild
If your registration year isn't listed above, get in touch — we'll confirm availability directly against your reg.
Land Rover Range Rover D300/D350 ENGINE COSTS
A Land Rover Range Rover D300/D350 engine rebuild starts from
£2,800
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 Range Rover D300/D350 ENGINE SIZES
• Land Rover Range Rover D300/D350 3.0 Litre Engine (AJ300D, I6)
MERCEDES Range Rover D300/D350 FUEL TYPES
• Land Rover Range Rover D300/D350 Petrol Mild Hybrid Engine Rebuilds
RELATED LAND ROVER ENGINES
Most Land Rover Range Rover D300/D350 engine rebuilds are completed within 3-5 working days.
Nationwide recovery and collection available for all Land Rover Range Rover D300/D350 models.