
Range Rover D300 D350 Engine Rebuild - From £2,800
Specialist 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 AJ300D Specialists
Your Range Rover D300 D350 Engine

Vehicle
Range Rover D300 D350
Model
Range Rover
Variant
Range Rover D300 D350
Fuel
Diesel MHEV
Engine
AJ300D
Capacity
3.0L I6
Generations
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
Range Rover D300 D350 Engine 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.
Range Rover D300 D350 Known Issues by Engine
If your Range Rover D300 D350 has the AJ300D (L663 generation):
Timing chain wear - Ingenium diesel engines share a well-documented timing chain pattern. We replace timing chains, guides and tensioners as standard on every AJ300D rebuild.
Source: established specialist consensus, l663.guide specialist buying guide, what-breaks.com. This applies to L663 Defenders only - not to classic Defender models

Range Rover D300 D350 ENGINE OPTIONS
Every Range Rover D300 D350 is different. That's why we offer the right solution for your engine, your car and your budget.
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 OptionsOUR 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 Range Rover D300 D350 rebuild looks like.
Range Rover D300 D350 ENGINE REBUILD PROCESS
WE COVER YOUR EXACT VEHICLE
Enter your registration below and we'll confirm your Range Rover D300 D350 has the AJ300D, along with an exact rebuild price.
WHY LAND ROVER 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 RECENT LAND ROVER 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.

Range Rover D300 D350
RECOVERY

Range Rover D300 D350
DIAGNOSTICS

Range Rover D300 D350
STRIPPED ENGINE

Range Rover D300 D350
TIMING CHAIN REPLACEMENT

Range Rover D300 D350
IN FOR REBUILD

Range Rover D300 D350
REBUILD IN PROGRESS
HOW IT WORKS
SEND YOURREGISTRATION
RECEIVE YOURFIXED-PRICE QUOTE
WE RECOVERYOUR CAR
REBUILD &REFIT
Most Defender 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 OR REPLACEMENT ENGINE INSTEAD?
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 and we'll show you every option, honestly.
ABOUT THE 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.
Range Rover D300 D350 ENGINE CODES

AJ300D (L460)
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 D350Range 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 (L663)
Drivetrain and ancillary specification
Whether your build falls in the early production period (2019-2020) for injector fault coverage
This is why we always start with your registration rather than a generic Defender quote - it protects you from paying for parts that don't fit your actual car.
Range Rover D300 D350 APPLICATIONS BY GENERATION
Range Rover D300 D350 ENGINES BY YEAR
Range Rover D300 D350 has used the AJ300D throughout. 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 Range Rover D300 D350 MODEL YEAR:
Range Rover D300 D350
2022 Engine Rebuild
Range Rover D300 D350
2023 Engine Rebuild
Range Rover D300 D350
2024 Engine Rebuild
Range Rover D300 D350
2025 Engine Rebuild
Range Rover D300 D350
2026 Engine Rebuild
If your registration year or model isn't listed above, get in touch - we'll confirm availability directly against your reg.
Range Rover D300 D350 ENGINE COSTS
A 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
LAND ROVER Range Rover D300 D350 ENGINE SIZES
• Range Rover D300 D350 3.0 Litre Engine (AJ300D, I6)
LAND ROVER Range Rover D300 D350 FUEL TYPES
• Range Rover D300 D350 Petrol Mild Hybrid Engine Rebuilds
Related Range Rover Variants
Most Range Rover D300 D350 engine rebuilds are completed within 3-5 working days.
Nationwide recovery and collection available for all Range Rover D300 D350 models.












