/// Specialists in Jaguar Engine Replacement & Rebuilds
Jaguar XJ engines for sale in the UK. Mayfair Rebuilds supplies used, reconditioned and rebuilt 3.0 diesel and 5.0 V8 XJ engines, matched to your engine code and handed over with up to 12 months warranty.
Factory Standard
Engine Rebuilds
Built to OE specifications
In-House Strip
Machine & Build
All work carried out in-house
Up to 12 Month
Warranty
Peace of mind guaranteed
Nationwide Collection
& Delivery
Across the UK mainland
Expert Support
Before & After Fit
Real people, real expertise
Every engine we supply is carefully selected, inspected and prepared to meet the highest standards. Choose the option that best suits your vehicle, your budget and your plans.
Genuine used engines sourced from trusted UK suppliers. Inspected, tested and ready to install.
Best for budget-conscious repairsand older vehicles
Compression & leak down testedIncludes basic warranty
Inspected for major componentsCleaned and checked before dispatch
Professionally reconditioned engines with worn parts replaced and tested to restore performance.
Best for daily drivers and high mileagevehicles
Reconditioned to OEM standardsQuality parts used throughout
Compression testedFinished and road-ready
Fully rebuilt engines with a complete strip down, precision machining and new or upgraded components.
Best for long-term reliabilityand performance
Built to factory standardsAll critical parts replaced or upgraded
Extensively tested & quality assuredIncludes premium warranty
Warranty ProtectionUp to 12 months warranty for total peace of mind
Expert Quality ChecksEvery engine inspected, tested & verified
Nationwide DeliverySecure delivery across the UK mainland
Specialist SupportOur team of experts are here to help
Fair & TransparentHonest pricing with no hidden surprises
A clear, technician-led route from diagnosis to supply, fitment and handover for Jaguar engines.
We assess symptoms, engine condition and likely failure path before recommending the next step.
Exact engine code, platform compatibility and replacement criteria are verified for the correct fit.
We determine the right route — used, reconditioned or rebuilt — then prepare or source accordingly.
The engine is supplied, fitted, tested and handed over with aftercare guidance and support.
Technician AssessedChecked by experienced engine specialists.
Code MatchedExact engine code and platform verified for perfect fit.
Prepared to StandardEngines prepared, tested and quality assured.
Fitted & SupportedInstalled, tested and backed by aftercare support.
Every engine we supply is rebuilt in-house at our UK facility by specialist technicians who live and breathe Jaguar engineering.
We don't cut corners. We rebuild to last.
Engines sourced from
credible UK channels
with known history
and provenance.
Complete disassembly
and inspection of every
component. Nothing
left unchecked.
Worn parts replaced.
Precision machining
where required.
Genuine or OEM
quality
components
used throughout.
Reassembled, tested
and run to factory
specifications.
Quality validated
before
release.
In-house facility.
UK based technicians.
Rebuilt to OEM standards
using quality components.
Pressure, compression,
leak-down & dynamic
testing on every engine.
Up to 12 months
warranty for total
peace of mind.
Transparent process.
Honest advice.
No hidden surprises.
Every engine we supply is rebuilt in-house at our UK facility by specialist technicians who live and breathe Jaguar engineering.
We don't cut corners. We rebuild to last.
Engines sourced from credible UK channels with known history and provenance.
Complete disassembly and inspection of every component. Nothing left unchecked.
Worn parts replaced. Precision machining where required. Genuine or OEM quality components used throughout.
Reassembled, tested and run to factory specifications. Quality validated before release.
UK Built: In-house facility. UK based technicians.
Quality First: Rebuilt to OEM standards using quality components.
Rigorous Testing: Pressure, compression, leak-down & dynamic testing on every engine.
Extended Warranty: Up to 12 months warranty for total peace of mind.
Built On Trust: Transparent process. Honest advice. No hidden surprises.
From TDV6, SDV6, TDV8 and SDV8 units to Ingenium diesel and petrol engines, AJ-V6 / AJ-V8 platforms, supercharged Jaguar and Range Rover engines, and selected hybrid / e-Torque systems, we support engine replacement, rebuild and reconditioning with platform-correct compatibility checks and workshop-led preparation.
Popular Land Rover and Range Rover diesel platforms requiring exact engine code, emissions specification and donor compatibility checks.
Best for:diesel replacement routes
Checks include:code match, oiling history, turbo and cooling review
Higher-output diesel V8 applications where fitment planning, ancillaries review and platform-correct preparation are essential.
Best for:premium diesel platforms
Checks include:compatibility, ancillaries and installation planning
Later-generation JLR 4 and 6 cylinder engines where timing architecture, ECU integration and model-year changes must be verified carefully.
Best for:modern JLR applications
Checks include:timing system, ECU and emissions compatibility
Established Jaguar and Range Rover petrol platforms including naturally aspirated and performance-led variants across multiple generations.
Best for:petrol platform replacements
Checks include:cooling, sealing, wear paths and timing components
Specialist support for supercharged applications where heat management, supporting systems and fitment accuracy matter as much as the core engine itself.
Best for:performance-focused builds
Checks include:boost systems, cooling and model-specific preparation
Where relevant, we assess the engine side of hybrid-assisted and mild-hybrid JLR platforms with careful integration and compatibility planning.
Best for:selected newer systems
Checks include:engine-side compatibility and integration points
Direct Jaguar engine expertise, in-house rebuild standards, engine code compatibility control, supply and fit coordination, and dependable aftercare — all under one accountable team.
Specialist knowledge across Jaguar engine replacement, rebuild and diagnostics.
One team manages assessment, sourcing or rebuild route, fitment planning and handover.
Engines are prepared, rebuilt and quality-checked under workshop-controlled standards.
Engine code, platform and fitment criteria are verified before any engine is recommended.
Strip-down inspection, component replacement and machining are carried out where required.
Clear warranty-backed support and post-fit guidance for added peace of mind.
Credible UK supply channels help secure suitable donor and replacement engines.
From engine selection to installation planning, the whole route is coordinated clearly.
Verified feedback from customers who chose Mayfair Rebuilds for Land Rover engine
replacement, Range Rover engine rebuilds, Jaguar engine supply and fit, and workshop-
prepared used, rebuilt and reconditioned engines. Real vehicle references, real outcomes
and support you can trust.
Range Rover Sport 3.0 SDV6
Engine issue diagnosed properly, options explained clearly, and the replacement unit fitted without drama. Smooth service from start to finish.
Land Rover Discovery 4 3.0 TDV6
Other companies just wanted to sell an engine. Mayfair actually checked compatibility, explained the rebuild route, and delivered exactly what was promised.
Jaguar XF 2.0 Ingenium Diesel
The reconditioned engine has been faultless. Excellent communication, realistic timescales and proper aftercare once the car was back on the road.
Range Rover Velar 2.0 Ingenium
Professional workshop, clear paperwork and no hard sell. They matched the correct engine code and coordinated everything properly.
Jaguar F-PACE 3.0 Supercharged
Rare to find this level of technical knowledge and customer service together. The engine rebuild quality and handover were excellent.
Looking for a Jaguar XJ engine for sale in the UK? Mayfair Rebuilds supplies used, reconditioned and rebuilt Jaguar XJ engines for every generation, from the X300 and X308 to the X350, X358 and X351. Petrol and diesel. V6 and V8. Supercharged and naturally aspirated.
We do not just send you an engine. Every unit is code matched to your registration and VIN, inspected in-house, and tested before it leaves our UK workshop. You can buy supply only, or use our supply and fit service. Each engine carries warranty options of up to 12 months, and we deliver to the UK mainland.
No hidden extras. No wrong engine turns up. Just the right XJ engine, prepared properly, at a fair price.
The XJ used many engine families over the years. We match the exact code before we quote, so the engine fits your platform, wiring and emissions setup.
| Common Problem (UK) | Main Cause | Fault Code(s) | Our Solution (Solution Code) | Equipment Used |
|---|---|---|---|---|
Cold-start chain rattle on 2.7/3.0 V6 diesel |
Stretched chains, worn guides, weak tensioner |
P0016, P0017 |
Reconditioned engine with new chain kit (XJ-D30-RC) |
JLR SDD / Pathfinder, compression tester |
Power loss and blue smoke on 3.0 V6 diesel |
Worn turbo bearing, oil feed fault |
P0299, P2263 |
Used or reconditioned unit, turbo checked (XJ-D30-TRB) |
Boost gauge, smoke machine |
Rough idle, misfire on 2.7/3.0 diesel |
Worn injectors, low fuel rail pressure |
P0266, P0268, P0087 |
Engine supply with injector test or replace (XJ-D27-INJ) |
Injector test bench, PicoScope oscilloscope |
Supercharger rattle, overheating on 5.0 V8 |
Timing tensioner wear, coupler and coolant pipe leaks |
P0017, P0217 |
Rebuilt 5.0 V8 to factory spec (XJ-P50-RBLT) |
Leak-down tester, engine stand, Autel MaxiSys |
Oil leaks, high oil use on 4.2/5.0 V8 petrol |
Worn seals, timing cover and rocker cover gaskets |
P0300, P0524 |
Rebuilt long block with new seals (XJ-V8-RBLT) |
Oil pressure gauge, dial gauge |
Fault codes are a guide. We always confirm the real cause on the bench before we recommend a fix.
Used XJ engines — sourced from trusted UK suppliers, compression and leak down tested, cleaned and checked before dispatch. Best for older cars and lower budgets. Basic warranty included.
Reconditioned XJ engines — worn parts replaced, rebuilt to OEM standards and compression tested. Best for daily drivers and high mileage cars.
Rebuilt XJ engines — full strip down, precision machining, new or upgraded critical parts, dynamic testing and premium warranty. Best for long term reliability.
We work on Jaguar XJ saloons of all ages and generations, including the X300, X308, X350, X358 and X351, plus XJR and SuperSport performance models. Our process is workshop led, not call centre led and the same team handles your engine from first check to handover
Get your Jaguar XJ back on the road in no time. Enter your registration number on Mayfair Rebuilds for an instant price quote, or use the manual search if you don't have one. Safe, secure and confidential.
Everything you need to know about our engine replacement, rebuild and supply process.
