Land Rover Garage - LAND ROVER ENGINE SPECIALISTS
Land Rover technician rebuilding an engine block

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

GB

Your Land Rover Defender P400e Engine

Land Rover turbocharged 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.

GB

DVLA & VIN verified

100% secure & private

No obligation quote

Land Rover Defender P400e Engine Rebuild Price

Starting From £2,800

Rebuild From

£2,800

L663 (2020, 110 only)

Generation

L663 (2020, 110 only)

Exact price depends on condition and parts required - submit your reg for a fixed-price quote.

Get Your 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 engine block

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.

01MOST POPULAR

REBUILDING YOUR DEFENDER P400E ENGINE

Most engine suppliers sell you a used engine of unknown history and hope it matches. We rebuild the engine your Defender P400e already has instead - strip it down, pressure-test it, and replace every worn or damaged component (timing chain, injector seals, bearings, gaskets, DC-DC converter) 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 Defender P400e owners choose, and it's the one we'd recommend for most situations.

From £2,800
02

RECONDITIONED DEFENDER P400E 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.

Learn more
03

REFURBISHED DEFENDER P400E 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.

Learn more
04

REMANUFACTURED DEFENDER P400E 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 AJ300P + electric motor.

Learn more
05

REPLACEMENT DEFENDER P400E 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.

Learn more
06

USED DEFENDER P400E 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.

Learn more

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 Options

OUR WORKSHOP

RECOVERY COLLECTION01

RECOVERY COLLECTION

AJ300P + electric motor ENGINE STRIPPED FOR REBUILD INSPECTION02

AJ300P + electric motor ENGINE STRIPPED FOR REBUILD INSPECTION

VALVE COVERS & COOLANT COMPONENT WORK03

VALVE COVERS & COOLANT COMPONENT WORK

TECHNICIANS AT WORK04

TECHNICIANS AT WORK

ENGINE TESTING (RIG)05

ENGINE TESTING (RIG)

COMPLETED & READY FOR REFIT06

COMPLETED & 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

1Diagnosis

We confirm your exact engine code and assess the damage.

2Removal

Your engine is removed and brought into our workshop.

3Strip-Down

Every component is removed for individual inspection.

4Inspection

Crankshaft, cylinder head, timing chain, bearings, water pump and gaskets are all checked.

5Machine Work

Any machining required is carried out to OEM tolerances.

6Component Replacement

Worn or damaged parts are replaced with updated OEM components.

7Reassembly

Your engine is rebuilt to original specification.

8Testing

Every rebuild is pressure-tested before refit.

9Refit

Your engine goes back into your Defender P400e.

10Road Test

A full road test confirms everything's right before we hand your car back.

WHAT LAND ROVER Defender P400e OWNERS SAY

Daniel R.

“Brilliant service from start to finish. My Defender P400e runs smoother than ever. Honest advice, clear pricing and the team know their stuff.”

Land Rover Defender P400e Engine Rebuild

Mark T.

“They rebuilt my AJ300P + electric motor with all the updated parts. Smooth process and great communication throughout.”

Land Rover Defender P400e Engine Rebuild

Ryan P.

“Top lads, top job. Picked up and dropped off, engine rebuilt to an extremely high standard. 100% recommend.”

Land Rover Defender P400e Engine Rebuild

Steve B.

“Saved me thousands compared to a dealer quote. Fantastic workmanship and my Defender P400e is running perfectly.”

Land Rover Defender P400e Engine Rebuild

Tom H.

“From quote to collection couldn't fault them. Engine looks brand new inside. Warranty gives great peace of mind.”

Land Rover Defender P400e Engine Rebuild

James K.

“Professional, reliable and fairly priced. Sorted properly and kept me updated throughout.”

Land Rover Defender P400e Engine Rebuild

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.

GB
FastAccurateNo Guesswork

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

Land Rover Defender P400e

RECOVERY

Land Rover Defender P400e

Land Rover Defender P400e

DIAGNOSTICS

Land Rover Defender P400e

Land Rover Defender P400e

STRIPPED ENGINE

Land Rover Defender P400e

Land Rover Defender P400e

TIMING CHAIN REPLACEMENT

Land Rover Defender P400e

Land Rover Defender P400e

IN FOR REBUILD

Land Rover Defender P400e

Land Rover Defender P400e

REBUILD IN PROGRESS

HOW IT WORKS

1

SEND YOURREGISTRATION

2

RECEIVE YOURFIXED-PRICE QUOTE

3

WE RECOVERYOUR CAR

4

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.

Ask About Used Engine Options

ABOUT THE Land Rover Defender P400e ENGINE

Land Rover engine and vehicle

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

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 P400e

Land Rover Defender P400e ENGINE COMPATIBILITY

Land Rover Land Rover vehicle in workshop

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

Generation

Chassis

Years

Engine Code

Fuel

L663

L663

110

2020 only

AJ300P + electric motor

Petrol Plug-in Hybrid

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.

Year

Generation

Engine Code

Fuel

Service

2020

L663 110

AJ300P + electric motor

Petrol Plug-in Hybrid

Rebuild / Replacement

i

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.

Land Rover engine

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

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.

Land Rover vehicle recovery and collection

FREQUENTLY ASKED QUESTIONS

Land Rover vehicle in a dark showroom

GET YOUR FREE LAND ROVER Defender P400e FIXED-PRICE QUOTE

Most quotes returned within 30 minutes during working hours.