Jaguar Engine Specialists
JAGUAR AJ16 ENGINEREBUILD & REPLACEMENT
Specialist Jaguar AJ16 engine rebuilds and replacements, fitted across the XJ X300. Nationwide recovery, registration-based engine matching, 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
Fitted Across 1 Jaguar Model
Starting from
£3,200
Jaguar AJ16 Engine Specifications
Engine Code
AJ16
Manufacturer
Jaguar
Configuration
Inline-6 (I6)
Capacity
4.0L (3,980 cc)
Fuel
Petrol
Production Years
1994-1997
Used In
1 Jaguar model
Jaguar AJ16 Engine Rebuild Price
Starting From
£3,200
The AJ16 sits on the 6-cylinder petrol rebuild tier. Exact price depends on condition and parts required - submit your reg for a fixed-price quote.
Get Your Fixed-Price Quote →
Jaguar AJ16 Applications - Every Model & Variant
Not seeing your exact model?
Send us your registration and we'll confirm.
Jaguar AJ16 Rebuild Components
Replaced as Standard
- Main bearings and connecting rod bearings
- Complete gasket and seal set
- Timing chain components where required
- Oil filter housing gasket
Inspected and Measured
- Crankshaft
- Cylinder head
- Timing chain tensioners and guides
- Oil pump
Inspected and Measured
- Cooling system components
- Fuel injectors
Application-Dependent
- Vehicle-specific ancillaries
Components drawn directly from Master Engine Data File research. Full scope confirmed once your engine is inspected - not guessed in advance.
OUR WORKSHOP
01RECOVERY COLLECTION
02STRIPPED AJ16 BLOCK
03INTERNAL ENGINE WORK
04TECHNICIANS AT WORK
05ENGINE TESTING (RIG)
06COMPLETED & READY FOR REFIT
Real photos from our workshop - not stock imagery.
JAGUAR AJ16 ENGINE REBUILD PROCESS
WE COVER YOUREXACT VEHICLE
WHY CHOOSE US FOR JAGUAR AJ16 REBUILDS
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
No widely-reported issue pattern for the AJ16 - we still recommend a full inspection before any long journey
OUR MOST RECENTJAGUAR 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
RECOVERY
Jaguar XJ
DIAGNOSTICS
Jaguar XJ
STRIPPED ENGINE
Jaguar XJ
TIMING CHAIN REPLACEMENT
Jaguar XJ
IN FOR REBUILD
Jaguar XJ
REBUILD IN PROGRESS
HOW IT WORKS
SEND YOURREGISTRATION
RECEIVE YOURFIXED-PRICE QUOTE
WE RECOVERYOUR CAR
REBUILD &REFIT
Most cars 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.
ABOUT THE
JAGUAR AJ16 ENGINE
The AJ16 is Jaguar's 4.0-litre inline-six petrol engine, produced from 1994 to 1997. It was fitted exclusively to the XJ X300 generation - the last of Jaguar's traditional straight-six engines before the brand moved to V8 power. The AJ16 is a robust, well-regarded engine that remains one of the most respected powerplants from the Ford-era Jaguar transition.
JAGUAR AJ16
APPLICATIONS BY MODEL
The AJ16 appeared exclusively in the XJ X300 generation as the XJ6 variant. This was the final iteration of Jaguar's legendary inline-six, and it represents the culmination of decades of straight-six development.
JAGUAR AJ16
ENGINE COMPATIBILITY
The AJ16 was used exclusively in the XJ X300 generation - meaning compatibility is straightforward for this particular engine code. However, even within a single application, ancillaries and mounting may vary by specification and year. We confirm your exact vehicle by registration/VIN before proceeding with any rebuild or replacement.
MODEL
Confirm your exact model and variant.
GENERATION
Identify the correct generation (X300).
DRIVETRAIN
Drivetrain and ancillary specification.
CONFIRMED BY REGISTRATION
We confirm by registration/VIN before quoting or supplying anything.
Jaguar AJ16
Applications We Work On
AJ16 in the XJ (X300, 1994-1997)
The AJ16 in the XJ X300 is the application we work on for this engine. This was the final generation of the Jaguar XJ to use the classic inline-six, and it remains a sought-after engine for its smoothness and character.
Starting from:
£3,200
MODEL
Jaguar XJ X300
ENGINE
AJ16 4.0L
YEAR
1994 - 1997
STARTING FROM
£3,200
Not seeing your exact model above? Send us your registration and we'll confirm your exact spec.
OUR WORKSHOP VIEW OF
THE JAGUAR AJ16
Built, rebuilt and tested by engineers who work on Jaguar engines every day.
Here's our practical view of the AJ16 across its XJ X300 application.
APPLICATIONS WE SEE:
The AJ16 is one of the engines we work on for the XJ X300 - the last of the classic Jaguar inline-sixes.
WHAT WE REPLACE:
Main bearings, connecting rod bearings, gaskets, seals, and timing chain components as standard on every rebuild.
KNOWN ISSUES:
No widely-reported catastrophic issue pattern is confirmed for the AJ16. It is a robust, well-regarded engine. That's a genuinely different situation from several other engines in our network where a specific wear pattern is well-documented - for the AJ16, we don't have one to report, and we won't invent one to sound more thorough.
AJ16 REBUILD INFORMATION
Typical rebuild scope:
A TYPICAL
JAGUAR AJ16 REBUILD
The following describes a typical rebuild scope for this engine - illustrative of the work involved, not a specific customer job. Real case studies from our own completed work will replace this section once available.
The AJ16 is a robust inline-six design, but a full rebuild still requires careful inspection of the crankshaft, cylinder head, and timing chain components. As with any engine of this era, the condition of the oil pump and cooling system components is also inspected during strip-down to ensure long-term reliability.
01INSPECTION & STRIP-DOWN
Careful inspection of the crankshaft, cylinder head, and timing chain components during strip-down.
02COMPONENT REPLACEMENT
Main bearings, connecting rod bearings, gaskets, seals, and timing chain components replaced as required.
03QUALITY CHECKS
All major rotating assemblies, oil pump, and cooling system components inspected for long-term reliability.
Typical Scope:
Main bearings, connecting rod bearings, gaskets, seals, timing chain components, and inspection of all major rotating assemblies.
Starting From:
£3,200
Jaguar AJ16
ENGINE REBUILD COST
A Jaguar AJ16 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.
Starting From
£3,200
Get a fixed-price quote within 30 minutes.
MODEL
Jaguar XJ X300
ENGINE
AJ16 4.0L
YEAR
1994 - 1997
STARTING FROM
£3,200
JAGUAR AJ16 REBUILD VS REPLACEMENT VS USED
Rebuilding Your AJ16 Engine
Most engine suppliers sell you a used engine of unknown history and hope it matches. We rebuild the engine your Jaguar already has instead - strip it down, pressure-test it, and replace every worn or damaged component 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 AJ16 owners choose.
- Strip down & inspect
- Pressure-test
- Replace worn components
- 12-month unlimited-mileage warranty
Replacement AJ16 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 unlimited-mileage warranty.
- Supplied & fitted by our team
- OEM quality
- 12-month unlimited-mileage warranty
Used AJ16 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 condition risk a used unit carries. Enter your reg below and we'll talk you through both options honestly.
- Low-mileage units
- Quick turnaround
- Condition risk - we advise honestly
Enter your registration and we’ll talk you through both options honestly.
Reconditioned, Refurbished or Remanufactured?
JAGUAR AJ16 RECONDITIONED 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.
→ Our rebuild service is exactly that.
JAGUAR AJ16 REFURBISHED ENGINES
"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.
→ Our rebuild service covers this.
JAGUAR AJ16 REMANUFACTURED 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.
→ That’s consistent with what our rebuild service delivers.
FREQUENTLY ASKED QUESTIONS
GET YOUR FREE
JAGUAR AJ16FIXED-PRICE QUOTE
FIXED PRICE
Transparent quotes with no hidden extras.
12-MONTH WARRANTY
Unlimited mileage for total peace of mind.
QUICK RESPONSE
Most quotes returned within 30 minutes during working hours.
