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

Range Rover P400 Engine Rebuild - From £3,200

Specialist Range Rover P400 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 Specialists

GB

Your Range Rover P400 Engine

Land Rover turbocharged engine

Vehicle

Range Rover P400

Model

Range Rover

Variant

Range Rover P400

Fuel

Petrol MHEV

Engine

AJ300P

Capacity

3.0L I6

Generations

L460 (2022-present)

Rebuild From

£3,200

?

Not sure which engine you have?

The Range Rover P400 uses the AJ300P 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

Range Rover P400 Engine Rebuild Price

Starting From £3,200

AJ300P engine

Engine Code

AJ300P

Rebuild From

£3,200

L460 (2022-present)

Generation

L460 (2022-present)

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

Get Your Fixed-Price Quote

Range Rover P400 Known Issues by Engine

If your Range Rover P400 has the AJ300P (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 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

Range Rover P400 ENGINE OPTIONS

Every Range Rover P400 is different. That's why we offer the right solution for your engine, your car and your budget.

01MOST POPULAR

REBUILDING YOUR RANGE ROVER P400 ENGINE

Most engine suppliers sell you a used engine of unknown history and hope it matches. We rebuild the engine your Range Rover P400 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 Range Rover P400 owners choose, and it's the one we'd recommend for most situations.

From £3,200
02

RECONDITIONED RANGE ROVER P400 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 RANGE ROVER P400 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 RANGE ROVER P400 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.

Learn more
05

REPLACEMENT RANGE ROVER P400 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 RANGE ROVER P400 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 and talk you through the best solution for your Range Rover P400, honestly.

Ask About Your Options

OUR WORKSHOP

RECOVERY COLLECTION01

RECOVERY COLLECTION

AJ300P ENGINE STRIPPED FOR REBUILD INSPECTION02

AJ300P 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 Range Rover P400 rebuild looks like.

Range Rover P400 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 Range Rover P400.

10Road Test

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

WHAT LAND ROVER Range Rover P400 OWNERS SAY

Daniel R.

“Brilliant service from start to finish. My Range Rover P400 runs smoother than ever. Honest advice, clear pricing and the team know their stuff.”

Range Rover P400 Engine Rebuild

Mark T.

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

Range Rover P400 Engine Rebuild

Ryan P.

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

Range Rover P400 Engine Rebuild

Steve B.

“Saved me thousands compared to a dealer quote. Fantastic workmanship and my Range Rover P400 is running perfectly.”

Range Rover P400 Engine Rebuild

Tom H.

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

Range Rover P400 Engine Rebuild

James K.

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

Range Rover P400 Engine Rebuild

WE COVER YOUR EXACT VEHICLE

Enter your registration below and we'll confirm your Range Rover P400 has the AJ300P, along with an exact rebuild price.

GB
FastAccurateNo Guesswork

WHY LAND ROVER Range Rover P400 OWNERS CHOOSE US

Engine matched using VIN or registration number - confirms your AJ300P 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.

Range Rover P400

Range Rover P400

RECOVERY

Range Rover P400

Range Rover P400

DIAGNOSTICS

Range Rover P400

Range Rover P400

STRIPPED ENGINE

Range Rover P400

Range Rover P400

TIMING CHAIN REPLACEMENT

Range Rover P400

Range Rover P400

IN FOR REBUILD

Range Rover P400

Range Rover P400

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 Range Rover P400 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 Range Rover P400 ENGINE

Land Rover engine and vehicle

The Range Rover P400 uses the AJ300P - a 3.0-litre inline-six petrol mild-hybrid engine. It was introduced with the L460 generation from 2022 and remains in production. The AJ300P is part of JLR's Ingenium engine family and represents a more modern design than the older TDV6/SDV6 diesel units that preceded it in the Range Rover line-up. The P400 badge denotes the power output tier within the petrol range.

We continue to rebuild and replace AJ300P engines for every Range Rover P400 on the road.

Range Rover P400 ENGINE CODES

The Range Rover P400 uses the AJ300P - a 3.0-litre inline-six petrol mild-hybrid engine. It was introduced with the L460 generation from 2022 and remains in production. The AJ300P is part of JLR's Ingenium engine family and represents a more modern design than the older TDV6/SDV6 diesel units that preceded it in the Range Rover line-up. The P400 badge denotes the power output tier within the petrol range.

Check Your AJ300P Range Rover P400

Range Rover P400 ENGINE COMPATIBILITY

Land Rover Land Rover vehicle in workshop

Because the Range Rover P400 uses a specific engine code (AJ300P) within the broader Ingenium family, fitting the wrong replacement or assuming parts compatibility with other variants risks a problem that's expensive to unpick. Before we quote or supply anything, we confirm:

Your exact engine code (AJ300P) 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 P400 APPLICATIONS BY GENERATION

Generation

Chassis

Years

Engine Code

Fuel

L460

L460

L460

2022-present

AJ300P

Petrol MHEV

Range Rover P400 ENGINES BY YEAR

Range Rover P400 has used the AJ300P throughout. If you're unsure of your exact spec, we'll confirm it before you book.

Year

Generation

Engine Code

Fuel

Service

2022

L460

AJ300P

Petrol MHEV

Rebuild / Replacement

2023

L460

AJ300P

Petrol MHEV

Rebuild / Replacement

2024

L460

AJ300P

Petrol MHEV

Rebuild / Replacement

2025

L460

AJ300P

Petrol MHEV

Rebuild / Replacement

2026

L460

AJ300P

Petrol MHEV

Rebuild / Replacement

i

The AJ300P has been fitted to every Range Rover P400 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 P400 MODEL YEAR:

Range Rover P400
2022 Engine Rebuild

Range Rover P400
2023 Engine Rebuild

Range Rover P400
2024 Engine Rebuild

Range Rover P400
2025 Engine Rebuild

Range Rover P400
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 P400 ENGINE COSTS

A Range Rover P400 engine rebuild starts from

£3,200

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 Range Rover P400 ENGINE SIZES

• Range Rover P400 3.0 Litre Engine (AJ300P, I6)

LAND ROVER Range Rover P400 FUEL TYPES

• Range Rover P400 Petrol Mild Hybrid Engine Rebuilds

Most Range Rover P400 engine rebuilds are completed within 3-5 working days.

Nationwide recovery and collection available for all Range Rover P400 models.

Land Rover vehicle recovery and collection

FREQUENTLY ASKED QUESTIONS

Land Rover vehicle in a dark showroom

GET YOUR FREE LAND ROVER Range Rover P400 FIXED-PRICE QUOTE

Most quotes returned within 30 minutes during working hours.