Above & BeyondLand Rover AJ300D ENGINE REBUILD & REPLACEMENT
Specialist Land Rover AJ300D engine rebuilds and replacements, fitted across Defender, Discovery, Range Rover, Range Rover Sport and Range Rover Velar. Nationwide recovery, registration-based engine matching, 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
Fitted Across 5 Land Rover Models
Starting from
£2,800
Land Rover AJ300D Engine Specifications
Engine Code
AJ300D
Manufacturer
Jaguar Land Rover (Ingenium family)
Configuration
Inline-6 (I6)
Capacity
3.0L (2,997 cc)
Fuel
Diesel, Diesel MHEV
Production Years
2019-present
Used In
5 Land Rover models
Not sure if your Land Rover has this engine?
Enter your registration and we'll confirm.
Land Rover AJ300D Engine Rebuild Price
Starting From
£2,800
The AJ300D is a 6-cylinder diesel engine. Exact price depends on condition and parts required - submit your reg for a fixed-price quote.
Get Your Fixed-Price Quote →
Land Rover AJ300D Applications - Every Model & Variant
Model
Variant
Generation
Chassis
Years
Powertrain Sub-type
Not seeing your exact model?
Send us your registration and we'll confirm.
Land Rover AJ300DRebuild Components
Replaced as Standard
- Timing chain assembly (chains, guides, tensioners)
- Main bearings and connecting rod bearings
- Complete gasket and seal set
- Oil filter housing gasket
Inspected and Measured
- Crankshaft
- Cylinder head
- Timing chain tensioners and guides
- Twin-turbocharger components (sequential turbo setup)
- EGR valve and cooler (cleaning every 40-50k km recommended)
- DPF and SCR components
- 48V mild-hybrid system components
- High-pressure fuel pump
- Oil for fuel dilution
Application-Dependent
- 48V MHEV system components
- Vehicle-specific ancillaries
Components drawn directly from VRF Key Components data. If your AJ300D's exact ancillary set isn't covered above, we confirm the full scope once your engine is inspected - not guessed in advance.
OUR WORKSHOP
01RECOVERY COLLECTION
Nationwide collection of your Land Rover AJ300D.
02STRIPPED ENGINE BLOCK
AJ300D engine stripped down and inspected thoroughly.
03TIMING CHAIN REPLACEMENT
Timing components replaced - a critical AJ300D wear point.
04TECHNICIANS AT WORK
Skilled AJ300D specialists rebuilding with precision and care.
05ENGINE TESTING (RIG)
Every AJ300D engine is tested to ensure perfect performance.
06COMPLETED & READY FOR REFIT
Fully rebuilt AJ300D engine, ready to go back in.
07CLEAN WORKSHOP BAYS
Modern, clean and organised workshop environment.
08PARTS & COMPONENTS
Genuine and quality components for every AJ300D rebuild.
09BEFORE / AFTER COMPARISON
See the transformation of a AJ300D during our rebuild process.
10OUR SPECIALIST TEAM
Experienced AJ300D specialists you can trust.
Real photos from our workshop - not stock imagery.
This is what a genuine AJ300D rebuild looks like.
WE COVER YOUR EXACT VEHICLE
Enter your registration below and we'll confirm whether your Land Rover has the AJ300D before you're quoted anything.
WHY CHOOSE US FOR LAND ROVER AJ300D REBUILDS
Engine matched using VIN or registration number
Confirms AJ300D before you're quoted
We don't swap your engine for an unknown used unit
Every engine is rebuilt properly
All engine ancillaries serviced as part of the rebuild
Everything inspected and renewed
Genuine specialist workshop - not a broker
We rebuild engines in-house
Nationwide recovery, workshop rebuild
From collection to road-ready
Trade & public enquiries welcome
We work with everyone
Specialist technicians with 10-15 years of experience
Skilled, trained and experienced
12 month unlimited-mileage warranty
For complete peace of mind
Dedicated advisor from quote to fit
One point of contact, always
No widely-reported pattern is confirmed for the AJ300D - we still recommend a full inspection before any long journey.
LAND ROVER AJ300D ENGINE REBUILD PROCESS
Real photos from our workshop - not stock imagery.
This is what a genuine AJ300D rebuild looks like.
OUR MOST RECENT LAND ROVER RECOVERIES & REBUILDS
Real Land Rovers brought into our workshop. Open bonnets, stripped blocks, and vehicles ready for collection - this is what genuine engine work looks like.
Defender 90
Recovery
Defender 110
Diagnostics
Defender 90
Stripped Engine
Defender 110
Timing Chain Replacement
Discovery 4
In For Rebuild
Defender 110
Rebuild In Progress
HOW IT WORKS
SEND YOURREGISTRATION
RECEIVE YOURFIXED-PRICE QUOTE
WE RECOVERYOUR CAR
REBUILD &REFIT
Most vehicles are recovered within a few hours of booking.
Most rebuilds are completed within 3-5 working days.
ABOUT THE
LAND ROVER AJ300D ENGINE
The AJ300D is Land Rover's 3.0-litre inline-six diesel engine, part of the Ingenium family introduced in 2019. It's a 6-cylinder diesel used across five current Land Rover model lines - the Defender, Discovery, Range Rover, Range Rover Sport and Range Rover Velar - primarily in mild-hybrid (MHEV) form.
We rebuild AJ300D engines across all five applications, with the same standard component replacement scope regardless of which model it's fitted to. Rebuilds start from £2,800.
LAND ROVER AJ300D
APPLICATIONS BY MODEL
Across the Defender (L663), the AJ300D appears as the D200, D250, D300 and D350 variants from 2020 onwards. The Discovery (L462) uses the same engine in D250, D300 and D350 form from 2020. The current Range Rover (L460) and Range Rover Sport (L461) both use the AJ300D in D250, D300 and D350 specifications from 2022. The Range Rover Velar (L560) uses the AJ300D in D200, D250 and D300 from 2019.
LAND ROVER AJ300D
ENGINE COMPATIBILITY
Because the AJ300D spans five different models across multiple generations - all in mild-hybrid (48V) form - compatibility comes down to confirming your exact model, generation, and drivetrain spec, which we do by registration. An AJ300D from a Velar isn't a drop-in match for an AJ300D from a Range Rover, even though it's the same base engine code - ancillaries, mounting, and 48V system integration all differ. Before we quote or supply anything, we confirm your exact vehicle.
We always confirm by registration/VIN before any rebuild or replacement.
Confirmed by
Registration / VIN
Model year
2019-present
Engine code
AJ300D
Fitted to
Defender L663, Discovery L462, Range Rover L460, Range Rover Sport L461, Range Rover Velar L560
Land Rover AJ300D Applications We Work On
AJ300D in the Defender (L663, 2020-present)
The AJ300D in the Defender is one of the applications we work on regularly, across D200, D250, D300 and D350 variants from 2020 onwards.
Model
Defender
Generation
L663
Chassis
L663
Years
2020-present
Powertrain
Diesel MHEV
Starting from
£2,800
Starting from:
£2,800
Not seeing your exact model above? Send us your registration and we'll confirm your exact spec.
OUR WORKSHOP VIEW OF
THE LAND ROVER AJ300D
Built, rebuilt and tested by engineers who work on Land Rover engines every day.
Here's our practical view of the AJ300D across its Land Rover applications.
APPLICATIONS WE SEE:
The AJ300D is one of the newer Ingenium engines we work on - fitted across five current Land Rover model lines, all in mild-hybrid form.
WHAT WE REPLACE:
Timing chain, main bearings, connecting rod bearings, gaskets and seals as standard on every rebuild, with 48V mild-hybrid ancillaries additionally accounted for.
KNOWN ISSUES:
No widely-reported catastrophic issue pattern is confirmed for the AJ300D. The 3.0-litre inline-six Ingenium has been fairly reliable. Some reports of EGR clogging and diesel knock after cold start exist, but these are maintenance items rather than catastrophic failures. We don't treat this engine as having one universal failure mode - diagnosis is required to establish whether an engine needs repair, rebuild or replacement.
A TYPICAL
LAND ROVER AJ300D REBUILD
The following describes a typical rebuild scope for this engine - illustrative of the work involved, not a specific customer job. Real case studies from our own completed work will replace this section once available.
The AJ300D is a 3.0-litre inline-six diesel, part of the Ingenium family introduced in 2019. It uses a sequential twin-turbo setup for improved response and power delivery. Most applications feature a 48V mild-hybrid system, requiring additional care during rebuilds. EGR valve cleaning is recommended every 40-50k km.
01Inspection & Strip-Down
Careful inspection of the crankshaft, cylinder head, and timing components during strip-down.
02Component Replacement
Main bearings, connecting rod bearings, gaskets, seals and timing components replaced as required.
03Quality Checks
All major rotating assemblies, oil pump, and cooling system components inspected for long-term reliability.
Typical Scope:
Timing chain, main bearings, connecting rod bearings, complete gasket and seal set, plus 48V MHEV ancillaries
Starting From:
£2,800
Land Rover AJ300D ENGINE REBUILD COST
A Land Rover AJ300D engine rebuild starts from £2,800, regardless of which of the five models it's fitted to - the price tier is set by the engine, not the badge on the vehicle. 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.
Starting From
£2,800
Price Factors
- Extent of internal damage
- Crankshaft condition
- Cylinder/head condition
- Turbocharger condition
- 48V system components
- Labour required
LAND ROVER AJ300D REBUILD VS REPLACEMENT VS USED
Rebuilding Your AJ300D Engine
Most engine suppliers sell you a used engine of unknown history and hope it matches. We rebuild the engine your Land Rover already has instead - strip it down, pressure-test it, and replace every worn or damaged component 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 AJ300D owners choose.
- Strip down & inspect
- Pressure-test
- Replace worn components
- 12-month unlimited-mileage warranty
Replacement AJ300D 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 unlimited-mileage warranty.
- Supplied & fitted by our team
- OEM quality
- 12-month unlimited-mileage warranty
Used AJ300D 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.
- Low-mileage units
- Quick turnaround
- Condition risk - we advise honestly
LAND ROVER AJ300D Reconditioned, Refurbished or Remanufactured?
LAND ROVER AJ300D RECONDITIONED 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.
LAND ROVER AJ300D REFURBISHED ENGINES
"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.
LAND ROVER AJ300D REMANUFACTURED 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, regardless of which of the six AJ300D-equipped models you drive.
Terminology Explained
Rebuilt:
Existing engine stripped, inspected and rebuilt to original specification.
Reconditioned:
Broad industry term; we define our rebuild as a full strip and rebuild.
Remanufactured:
Usually implies a defined restoration process; our rebuild meets this standard.
Used:
Existing engine from another vehicle; we can source and fit these.
What Land Rover Garage means by “rebuild”
Full strip-down, inspection, measurement, machining where required, replacement of worn components, reassembly, testing, and refit - with a 12-month unlimited-mileage warranty.
FREQUENTLY ASKED QUESTIONS
GET YOUR FREE LAND ROVER AJ300D FIXED-PRICE QUOTE
Most quotes returned within 30 minutes during working hours.