

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

Your Jaguar XJ 5.0 V8 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.
DVLA & VIN verified
100% secure & private
No obligation quote
Jaguar XJ 5.0 V8Engine Rebuild Price
Starting From £4,500

Engine Code
AJ133Rebuild From
£4,500

Generation
X351 (2009–2019)
Exact price depends on condition and parts required — submit your reg for a 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 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.
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.
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.
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.
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.
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.
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 OptionsOUR WORKSHOP
01RECOVERY COLLECTION
02AJ133 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 Jaguar XJ 5.0 V8 rebuild looks like.
Jaguar XJ 5.0 V8 ENGINE REBUILD PROCESS
WHAT MERCEDES XJ 5.0 V8 OWNERS SAY
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.
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
RECOVERY

Jaguar XJ 5.0 V8
DIAGNOSTICS

Jaguar XJ 5.0 V8
STRIPPED ENGINE

Jaguar XJ 5.0 V8
TIMING CHAIN REPLACEMENT

Jaguar XJ 5.0 V8
IN FOR REBUILD

Jaguar XJ 5.0 V8
REBUILD IN PROGRESS
HOW IT WORKS
SEND YOURREGISTRATION
RECEIVE YOURFIXED-PRICE QUOTE
WE RECOVERYOUR CAR
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.

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.
ABOUT THE Jaguar XJ 5.0 V8 ENGINE

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 (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 V8Jaguar XJ 5.0 V8 ENGINE COMPATIBILITY

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
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.
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.

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
RELATED 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.









