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Jaguar technician rebuilding a AMG GT 53 engine block
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Jaguar XJ 5.0 V8Engine Rebuild— From £4,500

Specialist Jaguar XJ 5.0 V8 engine rebuilds and replacements, with registration-based engine matching, nationwide recovery and a 12-month unlimited-mileage warranty

Rated Jaguar 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

AJ133 Specialists

GB
Jaguar

Your Jaguar XJ 5.0 V8 Engine

Jaguar AMG GT 53 TwinPower Turbo engine

Vehicle

Jaguar XJ 5.0 V8

Model

XJ

Variant

5.0 V8

Fuel

Petrol

Engine

AJ133

Capacity

5.0L V8

Generation

X351 (2009–2019)

Rebuild From

£4,500

?

Not sure which engine you have?

The XJ 5.0 V8 uses the AJ133 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

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No obligation quote

Jaguar XJ 5.0 V8Engine Rebuild Price

Starting From £4,500

AJ133 engine

Engine Code

AJ133

Rebuild From

£4,500

X351 (2009–2019)

Generation

X351 (2009–2019)

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

Get Your Fixed-Price Quote

Jaguar XJ 5.0 V8 Oil Leaks & Coolant System Wear (AJ133 I6)

The AJ133 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 AJ133 V6. We replace timing chains, bearings, water pump and gaskets as standard on every AJ133 rebuild.

Because the XJ 5.0 V8 uses a completely different engine family from the V8 M178 fitted to the XJ 63 and GT 63 S, parts and rebuild specifications don't cross over between them.

Source: Established AJ133 specialist pattern — timing chain, bearing and gasket wear across integrated-starter-generator inline-six units.

Jaguar AMG GT 53 engine block

Jaguar XJ 5.0 V8ENGINE OPTIONS

Every XJ 5.0 V8 is different. That's why we offer the right solution for your engine, your car and your budget.

01MOST POPULAR

REBUILDING YOUR XJ 5.0 V8 ENGINE

Most engine suppliers sell you a used engine of unknown history and hope it matches. We rebuild the engine your XJ already has instead — strip it down, pressure-test it, and replace every worn or damaged component (timing chain, tensioners, guides, water pump) 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 XJ owners choose, and it's the one we'd recommend for most situations.

02

RECONDITIONED XJ 5.0 V8 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 XJ 5.0 V8 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 XJ 5.0 V8 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 AJ133.

05

REPLACEMENT XJ 5.0 V8 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 XJ 5.0 V8 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 AJ133 and talk you through the best solution for your XJ 5.0 V8, honestly.

Ask About Your Options

OUR WORKSHOP

RECOVERY COLLECTION01

RECOVERY COLLECTION

AJ133 ENGINE STRIPPED FOR REBUILD INSPECTION02

AJ133 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 Jaguar XJ 5.0 V8 rebuild looks like.

Jaguar XJ 5.0 V8 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 XJ 5.0 V8.

10Road Test

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

WHAT MERCEDES XJ 5.0 V8 OWNERS SAY

Daniel R.

Brilliant service from start to finish. My XJ 5.0 V8 runs smoother than ever. Honest advice, clear pricing and the team know their stuff.

Jaguar XJ 5.0 V8 Engine Rebuild

Mark T.

They rebuilt my AJ133 with all the updated parts. Smooth process and great communication throughout.

Jaguar XJ 5.0 V8 Engine Rebuild

Ryan P.

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

Jaguar XJ 5.0 V8 Engine Rebuild

Steve B.

Saved me thousands compared to a dealer quote. Fantastic workmanship and my XJ 5.0 V8 is running perfectly.

Jaguar XJ 5.0 V8 Engine Rebuild

Tom H.

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

Jaguar XJ 5.0 V8 Engine Rebuild

James K.

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

Jaguar XJ 5.0 V8 Engine Rebuild

WE COVER YOUREXACT VEHICLE

Enter your registration below and we'll confirm your Jaguar XJ 5.0 V8 has the AJ133, along with an exact rebuild price.

GB
FastAccurateNo Guesswork

WHY MERCEDES XJ 5.0 V8 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.

Jaguar XJ 5.0 V8

Jaguar XJ 5.0 V8

RECOVERY

Jaguar XJ 5.0 V8

Jaguar XJ 5.0 V8

DIAGNOSTICS

Jaguar XJ 5.0 V8

Jaguar XJ 5.0 V8

STRIPPED ENGINE

Jaguar XJ 5.0 V8

Jaguar XJ 5.0 V8

TIMING CHAIN REPLACEMENT

Jaguar XJ 5.0 V8

Jaguar XJ 5.0 V8

IN FOR REBUILD

Jaguar XJ 5.0 V8

Jaguar XJ 5.0 V8

REBUILD IN PROGRESS

HOW IT WORKS

1

SEND YOURREGISTRATION

2

RECEIVE YOURFIXED-PRICE QUOTE

3

WE RECOVERYOUR CAR

4

REBUILD &REFIT

Most XJ 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.

Jaguar 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 XJ 5.0 V8 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 Jaguar XJ 5.0 V8 ENGINE

Jaguar AMG GT 53 engine and sedan

The XJ 5.0 V8 — fitted to the X351 generation from 2009 to 2019 — uses the AJ133 5.0-litre naturally aspirated V8. This engine was Jaguar's third-generation AJ-V8, introduced alongside the X351's launch and representing a significant development over the earlier 4.2-litre units. It produces 385bhp in naturally aspirated form and was also offered in supercharged guise as the XJR. The engine's timing chain tensioner design has been the subject of documented reliability concerns, which is why we address it as standard on every rebuild.

We continue to rebuild and replace AJ133 engines for every XJ 5.0 V8 on the road.

Jaguar XJ 5.0 V8 ENGINE CODES

AJ133

AJ133 (X351 (2009–2019))

A 5.0-litre naturally aspirated V8 petrol engine fitted to the XJ from 2009 to 2019 (X351 generation). Known for timing chain tensioner and guide wear, and water pump bearing/seal failure — see the callout above. We replace timing chain components and inspect the water pump as standard on every AJ133 rebuild. Check Your AJ133 XJ 5.0 V8 → [link to quote form]

Check Your AJ133 XJ 5.0 V8

Jaguar XJ 5.0 V8 ENGINE COMPATIBILITY

Jaguar touring in workshop

The XJ 5.0 V8 uses the AJ133 engine exclusively across its entire X351 production run. However, fitting the wrong replacement — or assuming an AJ133 part from a different model will work on an XJ — risks a compatibility problem that's expensive to unpick. Before we quote or supply anything, we confirm:

Your exact engine code (AJ133) via registration or VIN

Your generation (X351)

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 XJ quote — it protects you from paying for parts that don't fit your actual car.

Jaguar XJ 5.0 V8 APPLICATIONS BY GENERATION

Generation

Chassis

Years

Engine Code

Fuel

X351

X351

X351

2009–2019

AJ133

Petrol

Jaguar XJ 5.0 V8 ENGINES BY YEAR

Jaguar XJ 5.0 V8 has used the AJ133 throughout (X351 (2009–2019)). If you're unsure of your exact spec, we'll confirm it before you book.

Year

Generation

Engine Code

Fuel

Service

2009

X351

AJ133

Petrol

Rebuild / Replacement

2010

X351

AJ133

Petrol

Rebuild / Replacement

2011

X351

AJ133

Petrol

Rebuild / Replacement

2012

X351

AJ133

Petrol

Rebuild / Replacement

2013

X351

AJ133

Petrol

Rebuild / Replacement

2014

X351

AJ133

Petrol

Rebuild / Replacement

2015

X351

AJ133

Petrol

Rebuild / Replacement

2016

X351

AJ133

Petrol

Rebuild / Replacement

2017

X351

AJ133

Petrol

Rebuild / Replacement

2018

X351

AJ133

Petrol

Rebuild / Replacement

2019

X351

AJ133

Petrol

Rebuild / Replacement

i

The AJ133 has been fitted to every XJ 5.0 V8 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 Jaguar XJ 5.0 V8 MODEL YEAR:

Jaguar XJ 5.0 V8
2009 Engine Rebuild

Jaguar XJ 5.0 V8
2010 Engine Rebuild

Jaguar XJ 5.0 V8
2011 Engine Rebuild

Jaguar XJ 5.0 V8
2012 Engine Rebuild

Jaguar XJ 5.0 V8
2013 Engine Rebuild

Jaguar XJ 5.0 V8
2014 Engine Rebuild

Jaguar XJ 5.0 V8
2015 Engine Rebuild

Jaguar XJ 5.0 V8
2016 Engine Rebuild

Jaguar XJ 5.0 V8
2017 Engine Rebuild

Jaguar XJ 5.0 V8
2018 Engine Rebuild

Jaguar XJ 5.0 V8
2019 Engine Rebuild

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

Jaguar XJ 5.0 V8 ENGINE COSTS

A Jaguar XJ 5.0 V8 engine rebuild starts from

£4,500

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.

Jaguar AMG GT 53 engine

12 MONTH

UNLIMITED-MILEAGE

WARRANTY

MERCEDES XJ 5.0 V8 ENGINE SIZES

Jaguar XJ 5.0 V8 3.0 Litre Engine (AJ133, I6)

MERCEDES XJ 5.0 V8 FUEL TYPES

Jaguar XJ 5.0 V8 Petrol Mild Hybrid Engine Rebuilds

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View All Jaguar Engines

Most Jaguar XJ 5.0 V8 engine rebuilds are completed within 3-5 working days.

Nationwide recovery and collection available for all Jaguar XJ 5.0 V8 models.

Jaguar AMG GT recovery and collection

FREQUENTLY ASKED QUESTIONS

Jaguar AMG GT in a dark showroom

JaguarGET YOUR FREE MERCEDES XJ 5.0 V8 FIXED-PRICE QUOTE

Most quotes returned within 30 minutes during working hours.