Do you supply replacement Range Rover 306DT engines?

Yes. We supply used, reconditioned, and fully rebuilt 306DT engine options, depending on your vehicle's model year, engine code variant, and budget. Every unit is compatibility-checked before dispatch.

Can you fully rebuild a 306DT engine?

Absolutely. A 306DT rebuild involves a complete strip-down, crank and bearing inspection, precision machining, turbo assessment, and full reassembly with quality replacement parts to restore factory-level performance and reliability.

Are reconditioned 306DT engines genuinely reliable?

Yes. A reconditioned 306DT from our workshop is fully dismantled, cleaned, tested and restored with worn components replaced. It undergoes compression and pressure testing before release — making it a solid, dependable choice for everyday driving.

How much does a Range Rover 306DT engine replacement cost?

Costs vary based on model year, engine generation (GEN 1 or GEN 2), parts required and labour. We provide tailored, transparent quotes after checking your vehicle details, no guesswork, no inflated estimates.

Which Range Rover models use the 306DT engine?

The 306DT is fitted to Range Rover Sport (L320 and L494), Range Rover Vogue MK4 (L405), Range Rover Velar (L560), Land Rover Discovery 4 and Discovery 5. Availability depends on specific engine code and model year.

How do I know if my 306DT needs replacing?

Common warning signs include a deep knocking sound (often crank bearing related), excessive exhaust smoke, significant power loss, overheating, oil contamination or complete engine seizure. A professional diagnostic assessment can confirm whether you need a repair, rebuild or full replacement.

Is it worth replacing a 306DT engine rather than scrapping the vehicle?

In most cases, yes. If the body, transmission and interior remain in good condition, a replacement 306DT engine is significantly more cost-effective than purchasing a new vehicle and extends the usable life of your Range Rover by many years.

Are your 306DT engines tested before supply?

Every 306DT we supply, whether used, reconditioned or rebuilt, undergoes compression testing, leak-down checks and general running condition validation before dispatch. No engine leaves our facility without passing our quality standards.

Why should I choose Mayfair Rebuilds for my 306DT?

We specialise exclusively in JLR engine rebuilds and replacements. Our team understands the 306DT's specific failure patterns like crank bearing spin, turbo degradation, EGR carbon accumulation and rebuilds to prevent them. In-house preparation, code-matched compatibility, warranty backing and genuine aftercare set us apart from generic engine suppliers.

Mayfair Rebuilds workshop with rebuilt JLR engine

/// Specialists in Range Rover Engine Replacement & Rebuilds

Precision-Built Range Rover 306DT Engine Replacements You Can Rely On

The 3.0L TDV6 powerplant demands more than a generic replacement. Our technicians strip, inspect, machine and rebuild every 306DT to OE-calibre standards, so your Range Rover performs exactly as the factory intended.

Safe. Secure. 100% Confidential

We never share your details with third parties.

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

Trusted By Jlr Owners Across the Uk

Range Rover 306DT Engine Details

Engine Make : Range Rover

Engine Fuel : Diesel

Engine Horse Power : 211HP

Engine Size : 3.0

Engine Code : 306DT

Engine Layout : V

Engine Actual CC : 2993

Engine Cylinders : 6

Engine Valves : 24

Engine Power KW : 155 kW

Engine Fuel Supply : Direct Injection

Engine Charge : Exhaust Turbo Charger

Engine Camshaft Drive : All-wheel Drive

Range Rover 306DT Engine Problems & Fixes in the UK

The 306DT is the 3.0 TDV6/AJD-V6 diesel used in Range Rover and other JLR models. Below are common UK faults, symptoms, causes and fixes.

#	Common 306DT Problem	Common Symptoms	Likely Cause	Practical Solution
1	Crankshaft / bottom-end failure	Knocking noise, sudden seizure, oil pressure warning, metal in oil filter	Bearing wear, poor lubrication, high mileage, extended oil intervals	Stop driving immediately. Check oil filter for metal, inspect crank and bearings. Usually needs engine rebuild or replacement.
2	Timing chain rattle / stretch	Cold-start rattle, rough running, timing fault codes	Chain, guides or tensioner wear; dirty/old oil accelerates wear	Replace full timing chain kit, guides and tensioners. Use correct low-ash oil and shorter oil-change intervals.
3	EGR valve clogging	Limp mode, black smoke, poor throttle response, warning light	Soot/carbon build-up, common with short UK journeys	Remove and clean EGR valves; replace if seized. Clean intake carbon and ensure longer runs to operating temperature.
4	EGR cooler failure	Coolant loss, white smoke, rough idle, coolant smell	Internal EGR cooler crack causing coolant ingress	Pressure-test cooling system, inspect EGR cooler, replace failed cooler. Avoid using blanking plates as a permanent road fix.
5	DPF blockage	DPF warning, limp mode, high fuel use, failed regeneration	Repeated short trips prevent DPF regeneration	Diagnose root cause, clean DPF on-car or off-car, then complete proper regeneration drive. Do not remove the DPF; a missing factory DPF is an MOT failure in the UK.
6	Turbocharger / boost faults	Whistling, low boost, smoke, restricted performance	Turbo wear, boost leaks, actuator faults, split hoses	Smoke-test intake system, check actuator and boost pressure, replace failed hoses or turbo unit. Use correct oil and allow cool-down after hard driving.
7	Oil cooler / oil filter housing leak	Oil leak in engine valley, coolant/oil smell, overheating risk	Perished seals, cooler housing leaks, age-related gasket failure	Replace oil cooler seals or housing, clean valley, flush contaminated coolant/oil if mixing is found.
8	Inlet manifold cracking	Restricted performance, boost leak codes, hissing noise, soot marks	Plastic inlet manifold fatigue or split under boost	Confirm with smoke test/visual inspection. Replace cracked manifold with OEM-quality part.
9	Injector seal leaks / injector faults	Diesel smell, rough idle, hard starting, soot around injectors	Failed copper seals, injector wear, carbon build-up	Replace injector seals, clean seats properly, code/calibrate injectors if replaced.
10	Oil pump weakness / low oil pressure	Flickering oil light, timing noise, bearing noise	Oil pump wear, blocked pickup, pressure-control fault	Do not continue driving. Test oil pressure, inspect pickup, replace oil pump and check bearings/timing system.

Your 306DT Replacement in Clear 4 Controlled Steps

No vague promises. We walk you through proper fault diagnosis, exact engine-code matching, and workshop-led preparation before a single bolt is turned.

Vehicle & Fault Assessment

We assess symptoms, engine condition and likely failure path before recommending the next step.

Engine Code &
Compatibility Check

Exact engine code, platform compatibility and replacement criteria are verified for the correct fit.

Rebuild / Preparation /
Sourcing Path

We determine the right route — used, reconditioned or rebuilt — then prepare or source accordingly.

Supply, Fitment &
Handover

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.

WHY CHOOSE MAYFAIR REBUILDS

Why We're the Smarter Choice for Your 306DT Replacement

Direct 306DT expertise, in-house rebuild standards, engine-code compatibility control, supply-and-fit coordination, and dependable aftercare, all managed by one accountable team from start to finish.

Direct Range Rover Expertise

Specialist knowledge across Range Rover engine replacement, rebuild and diagnostics.

One Accountable Team

One team manages assessment, sourcing or rebuild route, fitment planning and handover.

In-House Standards

Engines are prepared, rebuilt and quality-checked under workshop-controlled standards.

Code & Compatibility Control

Engine code, platform and fitment criteria are verified before any engine is recommended.

Workshop-Led
Advantage

Rebuild Depth

Strip-down inspection, component replacement and machining are carried out where required.

Aftercare & Warranty

Clear warranty-backed support and post-fit guidance for added peace of mind.

UK Sourcing Network

Credible UK supply channels help secure suitable donor and replacement engines.

Supply & Fit Coordination

From engine selection to installation planning, the whole route is coordinated clearly.

Workshop Controlled

In-house standards, every time.

Compatibility Verified

Right engine. Right fit. Every time.

Warranty Backed

Quality you can rely on.

UK-Wide Support

Local service. Nationwide coverage.

Trusted by Land Rover, Range Rover & Jaguar Owners Across the UK

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 306DT Engine Specialists: Precision Rebuilds & Complete Replacements

A Range Rover 306DT engine replacement delivers the best outcome when it starts with the right diagnosis, not guesswork. At Mayfair Rebuilds, our team of 306DT specialists draws on decades of hands-on experience assessing failure type, engine code accuracy, donor suitability, and rebuild viability before ever recommending a path forward. Whether you need a used 306DT engine, a reconditioned 306DT unit, or a full strip-down rebuild, every engine we supply is checked for internal condition, generation compatibility and fitment requirements specific to the TDV6 platform.

We don't simply list 306DT engines for sale; we provide complete peace of mind through properly prepared replacements backed by a technically rigorous team and a fully equipped workshop. The 306DT's known vulnerabilities, crankshaft bearing spin, twin-turbo oil starvation, EGR carbon buildup, and piston erosion from over-fueling require a team that understands these engines at the component level, not just the catalogue level.

We supply and fit used and reconditioned 306DT engines across the UK with specialist aftercare for customers who value long-term reliability. We understand that price matters when you're researching Range Rover 306DT engine replacement costs in the UK, but from our experience, the deciding factor should never be price alone; it should be condition, preparation quality and compatibility assurance. Beyond engine replacement, we also handle 306DT engine repairs, helping customers select the right path with less risk, clear advice and a more dependable, lasting outcome.

Reviews & Proof

★ ★ ★ ★ ★

5.0 / 5 Average Customer Rating Based on verified customer reviews

JLR JLR Specialists

Workshop Prepared

★★★★★“

Daniel M.

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.

Sarah T.

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.

James R.

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.

Natalie P.

Range Rover Velar 2.0 Ingenium

Professional workshop, clear paperwork and no hard sell. They matched the correct engine code and coordinated everything properly.

Michael C.

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.

25+ Years Experience

Specialist engine
replacement knowledge.

Warranty-Backed Support

Up to 12 months cover
for added confidence.

UK-Wide Coverage

Supply, fitment support
and nationwide reach.

Thousands Helped

Used, rebuilt and
reconditioned engines
supplied and rebuilt.