Land RoverLAND ROVER GARAGELAND ROVER ENGINE SPECIALISTS
Land Rover technician rebuilding a AMG GT 53 engine block
Land Rover

Land Rover Range Rover Sport P400Engine Rebuild— From £3,200

Specialist Range Rover Sport 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

AJ300P Petrol MHEV Specialists

GB
Land Rover

Your Land Rover Range Rover Sport P400 Engine

Land Rover AMG GT 53 TwinPower Turbo engine

Vehicle

Range Rover Sport P400

Model

Range Rover Sport

Variant

P400

Fuel

Petrol MHEV

Engine

AJ300P

Capacity

3.0L I6

Generations

L461 (2022–present)

Rebuild From

£3,200

?

Not sure which engine you have?

The Range Rover Sport 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

Land Rover Range Rover Sport P400Engine Rebuild Price

Starting From £3,200

AJ300P engine

Engine Code

AJ300P

Rebuild From

£3,200

Generation

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

Get Your Fixed-Price Quote

Land Rover Range Rover Sport P400 Oil Leaks & Coolant System Wear (AJ300P I6)

The AJ300P is a sophisticated 3.0-litre inline-six with an integrated starter-generator and electric auxiliary compressor — a more modern and efficient design than the older AJ300P V6. We replace timing chains, bearings, water pump and gaskets as standard on every AJ300P rebuild.

Because the Range Rover Sport P400 uses a completely different engine family from the V8 M178 fitted to the Range Rover Sport 63 and GT 63 S, parts and rebuild specifications don't cross over between them.

Source: Established AJ300P specialist pattern — timing chain, bearing and gasket wear across integrated-starter-generator inline-six units.

Land Rover AMG GT 53 engine block

Land Rover Range Rover Sport P400ENGINE OPTIONS

Every Range Rover Sport 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 SPORT P400 ENGINE

Most engine suppliers sell you a used engine of unknown history and hope it matches. We rebuild the engine your Range Rover Sport P400 already has instead — strip it down, pressure-test it, and replace every worn or damaged component (timing chains, bearings, gaskets) 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 Sport owners choose, and it's the one we'd recommend for most situations.

02

RECONDITIONED RANGE ROVER SPORT 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.

03

REFURBISHED RANGE ROVER SPORT 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.

04

REMANUFACTURED RANGE ROVER SPORT 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.

05

REPLACEMENT RANGE ROVER SPORT 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.

06

USED RANGE ROVER SPORT 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.

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 Sport 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 Land Rover Range Rover Sport P400 rebuild looks like.

Land Rover Range Rover Sport 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 Sport P400.

10Road Test

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

WHAT MERCEDES Range Rover Sport P400 OWNERS SAY

Daniel R.

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

Land Rover Range Rover Sport P400 Engine Rebuild

Mark T.

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

Land Rover Range Rover Sport P400 Engine Rebuild

Ryan P.

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

Land Rover Range Rover Sport P400 Engine Rebuild

Steve B.

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

Land Rover Range Rover Sport P400 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 Range Rover Sport P400 Engine Rebuild

James K.

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

Land Rover Range Rover Sport P400 Engine Rebuild

WE COVER YOUREXACT VEHICLE

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

GB
FastAccurateNo Guesswork

WHY MERCEDES Range Rover Sport P400 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 RECENTMERCEDES 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 Range Rover Sport P400

Land Rover Range Rover Sport P400

RECOVERY

Land Rover Range Rover Sport P400

Land Rover Range Rover Sport P400

DIAGNOSTICS

Land Rover Range Rover Sport P400

Land Rover Range Rover Sport P400

STRIPPED ENGINE

Land Rover Range Rover Sport P400

Land Rover Range Rover Sport P400

TIMING CHAIN REPLACEMENT

Land Rover Range Rover Sport P400

Land Rover Range Rover Sport P400

IN FOR REBUILD

Land Rover Range Rover Sport P400

Land Rover Range Rover Sport P400

REBUILD IN PROGRESS

HOW IT WORKS

1

SEND YOURREGISTRATION

2

RECEIVE YOURFIXED-PRICE QUOTE

3

WE RECOVERYOUR CAR

4

REBUILD &REFIT

Most Range Rover Sport 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.

Land Rover engines on workshop pallets

LOOKING FOR A USED ORREPLACEMENT ENGINEINSTEAD?

We supply low-mileage, VIN-matched used units too, and offer full replacement and fitting. However, most Range Rover Sport 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 — we'll show you every option, honestly.

Ask About Used Engine Options

ABOUT THE Land Rover Range Rover Sport P400 ENGINE

Land Rover AMG GT 53 engine and sedan

The Range Rover Sport P400 is part of the current-generation L461 model, introduced in 2022 as the petrol mild-hybrid option in the lineup. It uses the AJ300P — a 3.0-litre inline-six petrol engine with mild-hybrid assistance, part of JLR's Ingenium family. The AJ300P is a more modern design than the older supercharged V8s found in earlier Sport models, with fewer widely-documented failure patterns reported across the specialist community.

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

Land Rover Range Rover Sport P400 ENGINE CODES

A 3.0-litre inline-six petrol fitted to the Range Rover Sport P400 from 2022 to present (L461 generation). This is JLR's Ingenium petrol engine with mild-hybrid technology. No widely-documented specific known issue is confirmed for this variant — we still recommend a full inspection before any long journey. We replace timing chains, bearings and gaskets as standard on every AJ300P rebuild. Check Your AJ300P Range Rover Sport P400 → [link to quote form]

Check Your AJ300P Range Rover Sport P400

Land Rover Range Rover Sport P400 ENGINE COMPATIBILITY

Land Rover touring in workshop

The Range Rover Sport P400's AJ300P is a specific engine code within the Ingenium family, used exclusively on the current L461 generation. Because the AJ300P is a distinct unit from both the diesel Ingenium variants and the BMW-sourced V8s also fitted to the L461 Sport range, confirming your exact engine code matters for parts sourcing and rebuild specificity. Before we quote or supply anything, we confirm:

Your exact engine code (AJ300P) via registration or VIN

Your generation (L461)

Drivetrain and ancillary specification

Any electronics or ECU considerations specific to your exact build

This is why we always start with your registration rather than a generic Range Rover Sport quote — it protects you from paying for parts that don't fit your actual car.

Land Rover Range Rover Sport P400 APPLICATIONS BY GENERATION

Generation

Chassis

Years

Engine Code

Fuel

L461

L461

L461

2022–present

AJ300P

Petrol MHEV

Land Rover Range Rover Sport P400 ENGINES BY YEAR

Land Rover Range Rover Sport 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

L461

AJ300P

Petrol MHEV

Rebuild / Replacement

2023

L461

AJ300P

Petrol MHEV

Rebuild / Replacement

2024

L461

AJ300P

Petrol MHEV

Rebuild / Replacement

2025

L461

AJ300P

Petrol MHEV

Rebuild / Replacement

2026

L461

AJ300P

Petrol MHEV

Rebuild / Replacement

i

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

Land Rover Range Rover Sport P400
2022 Engine Rebuild

Land Rover Range Rover Sport P400
2023 Engine Rebuild

Land Rover Range Rover Sport P400
2024 Engine Rebuild

Land Rover Range Rover Sport P400
2025 Engine Rebuild

Land Rover Range Rover Sport P400
2026 Engine Rebuild

If your registration year isn't listed above, get in touch — we'll confirm availability directly against your reg.

Land Rover Range Rover Sport P400 ENGINE COSTS

A Land Rover Range Rover Sport 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 AMG GT 53 engine

12 MONTH

UNLIMITED-MILEAGE

WARRANTY

MERCEDES Range Rover Sport P400 ENGINE SIZES

Land Rover Range Rover Sport P400 3.0 Litre Engine (AJ300P, I6)

MERCEDES Range Rover Sport P400 FUEL TYPES

Land Rover Range Rover Sport P400 Petrol Mild Hybrid Engine Rebuilds

RELATED LAND ROVER ENGINES

View All Land Rover Engines

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

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

Land Rover AMG GT recovery and collection

FREQUENTLY ASKED QUESTIONS

Land Rover AMG GT in a dark showroom

Land RoverGET YOUR FREE MERCEDES Range Rover Sport P400 FIXED-PRICE QUOTE

Most quotes returned within 30 minutes during working hours.