The heart of a luxury vehicle should beat smoothly. When a Jaguar XJ experiences engine issues – from turbo whine on the 3.0 L V6 diesel to overheating on an older 4.2 V8 petrol – performance, mileage, and confidence all suffer. At Royal Rebuilds, we solve those problems every day. We stock and remanufacture complete Jaguar XJ engines – V6 and V8, petrol and diesel, X350 and X358 – ready for quick delivery or in house supply and fit in our independent garage. Many drivers save up to 50% compared with buying a new unit, and every engine leaves our workshop with a warranty of up to 12 months and no mileage limit.
No matter whether you need a low mileage used engine, a fully reconditioned Jaguar XJ 3.0 diesel, or a 4.2 petrol V8 built from the block up, our specialists match the right engine code to your chassis, recover your vehicle if it is not drivable, and hand your car back after the proper testing and inspection. That means 100% satisfaction without the guesswork.
Your Independent Jaguar XJ Engine Specialists: Used and Reconditioned Jaguar Engine for Sale
As a JLR-focused supplier, we maintain a stock of high quality engines, ranging from reconditioned AJ-V6 diesel engines to late-model 5.0 V8s. Each unit is stripped, measured, and rebuilt with OEM grade parts during engine reconditioning. Block faces are skimmed, crankshafts balanced, auxiliary pumps tested, and turbos inspected for correct boost. Whether you choose a reconditioned or a used engine, you receive:
- Supply and fit or delivery only – engines can be fitted in our workshop or shipped to your chosen garage the next working day.
- Vehicle recovery service – vehicle recovery option if your XJ has suffered engine failure.
- Flexible warranty – up to 12 months, with length depending on the parts and type of engine you select.
- Unlimited-mileage cover for the period of the warranty.
- Post-installation checks – oil pressure, coolant flow and ECU diagnostics recorded for your records.
Add competitive online prices, an experienced fit service team, and transparent communication with expert technicians, and it is easy to see why owners of Jaguar, Land Rover and Range Rover vehicles trust our engine solution first.
Frequently Asked Questions
Q1. How do I know my Jaguar XJ engine really needs replacing?
A specialist will confirm engine failure by checking compression, oil pressure and any unusual knocking or smoking before recommending recon or replacement.
Q2. Do you stock both diesel and petrol Jaguar XJ engines?
Yes – 3.0 L V6 diesel engines, 2.7 V6 diesel, 4.2 V8 petrol and newer 5.0 V8 petrol units are all held in our engines in stock list.
Q3. What is the difference between a used and a reconditioned engine?
A used engine is a low mileage complete engine removed from a donor car, while a reconditioned engine is stripped and rebuilt with new internal parts for the best quality and reliability.
Q4. Can you supply and fit a Jaguar XJ diesel engine the same week?
If the exact engine code is on the shelf, we can arrange recovery, engine fitted, and hand-back within seven to ten working days, subject to workshop space.
Q5. Do you offer engines for the X350 and X358 models?
Absolutely – we match engine codes for both chassis generations, including the 3.0 L V6 diesel and 4.2 V8 petrol options.
Q6. Is the warranty really unlimited mileage?
During the agreed warranty period (up to 12 months) there is no mileage cap; coverage terms depend on the parts and engine type you choose.
Q7. What discount can I expect compared with a brand-new Jaguar engine?
Savings are typically up to 50% of main-dealer list pricing thanks to our reconditioning and low-mileage sourcing model.
Q8. Do you supply turbos and ancillaries with the engine?
Yes – every complete engine is delivered with matching turbo, injectors, and key sensors unless you request a bare long-block.
Q9. Can I buy an engine only and have my local garage fit it?
Certainly. We ship throughout the UK with fitting notes so any competent garage can install the engine for your Jaguar XJ.
Q10. What if my XJ has a rare engine code?
Our livestock database covers AJ-V6D, 306DT, and other engine codes; if none are available, we can remanufacture yours or source a suitable donor.
Q11. Is a reconditioned Jaguar XJ engine as good as a new one?
Performance and durability are restored to factory standards, often with upgraded bearings and gaskets for longer life.
Q12. Do you work on Range Rover or Land Rover engines too?
Yes – our workshop handles Jaguar Land Rover and other 4x4 vehicles, but Jaguar XJ engines remain a core speciality.
Q13. Can I drive the car to you if it still runs?
If safe, yes. If not, use our vehicle recovery service, included in many replacement engine packages.
Q14. Will a replacement engine improve fuel economy?
A healthy recon or low-mileage engine restores correct combustion and turbo boost, often improving mpg over a tired unit.
Q15. How long does an engine overhaul take?
A full remanufacture averages three to four weeks, depending on parts availability and machining workload.
Q16. Do you fit new timing chains during reconditioning?
All wear items such as timing chains, seals, and bearings are replaced to ensure reliability.
Q17. Can I upgrade from a V6 diesel to a V8 petrol?
Engine swaps outside the original spec require ECU, exhaust and drivetrain changes; our engineers can advise on feasibility.
Q18. Is there a mileage limit on the engines you import?
We target low-mileage donor units, typically under 60-80k miles, and verify readings through service records where possible.
Q19. Do you offer finance or staged payments?
We can recommend trusted finance partners; please ask during your quotation.
Q20. How do I get a quote for my Jaguar XJ engine replacement?
Call, email, or enter your registration online; we cross check the engine code and reply with an exact supply-and-fit or delivery price, usually within an hour.
From recon to replacement, Royal Rebuilds delivers the right engine for your Jaguar XJ – quickly, expertly, and at a competitive price that keeps your luxury car on the road.
