/// Specialists in Land Rover Engine Replacement & Rebuilds
Get the right Discovery 4 engine matched to your vehicle, engine code, gearbox, ECU, DPF setup and emissions layout — with expert supply, fitting and UK-wide support.
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
Not every Discovery 4 engine failure needs the same solution. We help you compare used, checked engines; rebuilt units; and reconditioned engines based on damage, mileage, budget, and long-term 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 controlled process covering fault checks, engine identification, compatibility matching, workshop preparation and professional Discovery 4 engine replacement support.
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.
We inspect, prepare, rebuild and validate engines under workshop control, reducing the risk of poor matching, hidden damage and repeat engine failure.
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.
We inspect, prepare, rebuild and validate engines under workshop control, reducing the risk of poor matching, hidden damage and repeat engine failure.
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
Avoid incorrect engine matches, vague repair advice, and unsafe supplier choices. Our team provides precise checks, workshop-led rebuild standards, and clear supply-and-fit options.
Specialist knowledge across Land Rover 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.
At Mayfair Rebuilds, we help UK drivers find the right Land Rover Discovery 4 engine with clear advice, reliable sourcing and professional workshop support. Whether you need a Discovery 4 engine for sale, a Discovery 4 SDV6 engine for sale, a checked used unit, a reconditioned engine or a complete Discovery 4 engine rebuild, our team matches the correct engine to your registration, VIN, engine code, gearbox, ECU, DPF system and emissions setup before any work starts.
A Discovery 4 engine may need replacing due to crankshaft failure, bearing wear, turbo damage, oil starvation, overheating, timing issues, low compression, coolant loss, or complete engine failure. We work with the main Discovery 4 engine sizes, including the Discovery 4 3.0 engine, Discovery 4 3.0 tdv6 engine, SDV6 diesel units and selected petrol variants. Common engine codes include 306DT, 30DDTX and 276DT, but the correct match must always be confirmed before supply or fitting.
Our service covers diagnosis, engine sourcing, strip-down inspection, reconditioning, rebuilding, replacement parts, engine fitting and UK-wide support. If your vehicle is already off the road, we can advise whether a Discovery 4 engine swap is the safest option or whether rebuilding your current unit is more suitable. We also offer discovery 4 engine supply and fit options for customers who want one accountable team to handle the job from start to finish.
Land Rover Discovery 4 engine replacement cost depends on engine type, condition, labour, parts required, VAT, warranty level and whether you choose supply only or full supply and fit. For the most accurate price, speak to Mayfair Rebuilds today and request a tailored Discovery 4 engine quote.
Everything you need to know about our engine replacement, rebuild and supply process.
