
Land Rover Defender P400e Engine Rebuild - From £2,800
Specialist Land Rover Defender P400e 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 AJ300P + electric motor Specialists
Your Land Rover Defender P400e Engine

Vehicle
Land Rover Defender P400e
Model
Defender
Variant
Defender P400e
Fuel
Petrol Plug-in Hybrid
Engine
AJ300P + electric motor
Capacity
3.0L I6 + electric
Generations
L663 (2020 only, 110 only - discontinued)
Rebuild From
£2,800
Not sure which engine you have?
The Defender P400e uses the AJ300P + electric motor 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 Defender P400e Engine Rebuild Price
Starting From £2,800

Engine Code
AJ300P + electric motorRebuild From
£2,800

Generation
L663 (2020, 110 only)
Exact price depends on condition and parts required - submit your reg for a fixed-price quote.
Land Rover Defender P400e Known Issues by Engine
If your Defender P400e has the AJ300P + electric motor (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 AJ300P + electric motor rebuild.
Source: established specialist consensus, l663.guide specialist buying guide, what-breaks.com. This applies to L663 Defenders only - not to classic Defender models

Land Rover Defender P400e ENGINE OPTIONS
Every Defender P400e 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 AJ300P + electric motor and talk you through the best solution for your Defender P400e, honestly.
Ask About Your OptionsOUR WORKSHOP
01RECOVERY COLLECTION

02AJ300P + electric motor 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 Defender P400e rebuild looks like.
Land Rover Defender P400e ENGINE REBUILD PROCESS
WE COVER YOUR EXACT VEHICLE
Enter your registration below and we'll confirm your Land Rover Defender P400e has the AJ300P + electric motor, along with an exact rebuild price.
WHY LAND ROVER Defender P400e OWNERS CHOOSE US
Engine matched using VIN or registration number - confirms your exact spec 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
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.

Land Rover Defender P400e
RECOVERY

Land Rover Defender P400e
DIAGNOSTICS

Land Rover Defender P400e
STRIPPED ENGINE

Land Rover Defender P400e
TIMING CHAIN REPLACEMENT

Land Rover Defender P400e
IN FOR REBUILD

Land Rover Defender P400e
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 Defender P400e 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 Land Rover Defender P400e ENGINE

The Defender P400e is a plug-in hybrid variant of the L663-generation Defender, introduced in 2020. It combines the Ingenium AJ300P - a 3.0-litre inline-six petrol engine - with an electric motor, producing a combined output of 404 PS. Production was limited to the 2020 model year and the 110 body style only, making it a relatively rare variant in the Defender range. The Defender P400e 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 AJ300P + electric motor engines for every Defender P400e on the road.
Land Rover Defender P400e ENGINE CODES

AJ300P + Electric Motor (L663, 2020 only)
A 3.0-litre inline-six petrol engine paired with a plug-in hybrid electric motor, fitted exclusively to the L663-generation Defender 110 in 2020. We rebuild the internal combustion engine component to the same standard as our other Defender petrol rebuilds, with timing chains, bearings and gaskets replaced as standard.
Check Your AJ300P + Electric Motor Defender P400eLand Rover Defender P400e ENGINE COMPATIBILITY

The P400e is a distinct PHEV variant that was only produced for the 2020 model year and exclusively in the 110 body style. Unlike the standard P400, the P400e features a plug-in hybrid drivetrain with additional electrical components. Before we quote or supply anything, we confirm:
Your exact engine code (AJ300P + electric motor) 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.
Land Rover Defender P400e APPLICATIONS BY GENERATION
Land Rover Defender P400e ENGINES BY YEAR
Land Rover Defender P400e has used the AJ300P + electric motor throughout. If you're unsure of your exact spec, we'll confirm it before you book.
The AJ300P + electric motor has been fitted to every Defender P400e 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 Defender P400e MODEL YEAR:
Land Rover Defender P400e
2020 Engine Rebuild
If your registration year or model isn't listed above, get in touch - we'll confirm availability directly against your reg.
Land Rover Defender P400e ENGINE COSTS
A Land Rover Defender P400e 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 Defender P400e ENGINE SIZES
• Land Rover Defender P400e 3.0 Litre Engine (AJ300P + electric motor, I6)
LAND ROVER Defender P400e FUEL TYPES
• Land Rover Defender P400e Petrol Mild Hybrid Engine Rebuilds
Related Land Rover Defender Variants
Most Land Rover Defender P400e engine rebuilds are completed within 3-5 working days.
Nationwide recovery and collection available for all Land Rover Defender P400e models.












