Speak to Our Specialists 01708 929 023
Mayfair Rebuilds workshop with rebuilt JLR engine

/// Specialists in Jaguar Engine Replacement & Rebuilds

Jaguar AJ20D6 Engine for Sale – Used, Reconditioned and Rebuilt Units

Mayfair Rebuilds supplies and fits tested used, reconditioned, and rebuilt Jaguar AJ20D6 3.0-litre Ingenium diesel engines across the UK mainland. Every unit is matched to your registration, built and tested in-house, and backed by up to 12 months warranty.

Please enter valid Reg. No

Don't Have REG..? Click Here

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

Land Rover
Range Rover
Jaguar

Jaguar AJ20D6 Engine Details

Engine Make : Jaguar
Engine Fuel : Diesel
Engine Horse Power : 300HP
Engine Size : 3.0
Engine Code : AJ20D6
Engine Layout : V
Engine Actual CC : 2997
Engine Cylinders : 6
Engine Valves : 24
Engine Power KW : 221 kW
Engine Fuel Supply : Direct Injection
Engine Charge : Exhaust Turbo Charger
Engine Camshaft Drive : All-wheel Drive
/// COMMON Jaguar AJ20D6 FAILURE POINTS

Common Jaguar AJ20D6 Engine Problems and Our Engine Solution

Here are the main UK faults on the 3.0-litre Jaguar AJ20D6 diesel and how Mayfair Rebuilds fixes them.

Vehicle Problem & Fault Codes Common UK Cause Solution

Rising oil level, turbo whine, bearing knock (P252F-00, P2463-00, P0299-00)

Short town runs stop DPF regens and wash diesel into the sump

JLR TOPIx Cloud (DoIP VCI) & Mitutoyo Micrometre: In-house rebuild with crank grind and new bearings

Oil leak and red low oil pressure warning (P0521-00, P0524-00)

Cracked plastic oil filter cap leaks oil and seizes crank bearings

Digital Oil Pressure & Leak-Down Testers: Fit revised housing and tested replacement AJ20D6 unit

White smoke, coolant loss, overheating (P0401-00, P2457-00, P0217-00)

Split EGR cooler or rear plastic pipes warp the aluminium head

Hydraulic Head Pressure Rig & Serdi Machine: Skim head, renew EGR parts, or fit reconditioned engine

Front drive knock, belt snap, overheating (P0620-00, Symptom 497000)

Heavy 48V starter-generator load loosens the A/C bracket or idler pulley

JLR Pathfinder & Sunnen Honing Machine: Fit revised bracket, pulley, PCM update, or rebuilt AJ20D6 engine

/// Workshop-Led Process

4 Step Process to Engine Replacement

A clear, technician-led route from diagnosis to supply, fitment and handover for Jaguar engines.

01
Vehicle and fault assessment

Vehicle & Fault Assessment

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

02
Engine code and compatibility check

Engine Code &
Compatibility Check

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

03
Engine rebuild preparation

Rebuild / Preparation /
Sourcing Path

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

04
Supply fitment and handover

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

Why Mayfair Is the Smarter Choice for Jaguar Engine Replacement

Direct Jaguar engine expertise, in-house rebuild standards, engine code compatibility control, supply and fit coordination, and dependable aftercare — all under one accountable team.

01

Direct Jaguar Expertise

Specialist knowledge across Jaguar engine replacement, rebuild and diagnostics.

02

One Accountable Team

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

03

In-House Standards

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

04

Code & Compatibility Control

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

Mayfair Rebuilds Workshop-Led
Advantage
05

Rebuild Depth

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

06

Aftercare & Warranty

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

07

UK Sourcing Network

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

08

Supply & Fit Coordination

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

Reviews & Proof

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.

★ ★ ★ ★ ★
5.0 / 5 Average Customer Rating Based on verified customer reviews
JLR JLR Specialists
Workshop Prepared
UK-Wide Support
★★★★★“

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.

Used and Reconditioned Jaguar AJ20D6 Engine Replacement Specialists

Need a reliable Jaguar AJ20D6 engine for sale in the UK? Mayfair Rebuilds supplies and fits tested used, reconditioned and rebuilt Jaguar AJ20D6 engines across the UK mainland, with savings up to 40%. Every Jaguar AJ20D6 engine from us passes strict workshop checks before dispatch or fitting.

The Jaguar AJ20D6 engine is a 3.0 litre straight six Ingenium twin turbo diesel with 48V mild hybrid power. Jaguar fitted this diesel engine to F Pace D300 models from late 2020 onwards. When oil dilution, coolant leaks, or bearing wear ruins this unit, a main dealer replacement often costs over £10,000.

We have a huge stock of low mileage used and reconditioned Jaguar AJ20D6 engines. We support Jaguar drivers and local garages across England, Scotland, and Wales. Send us your vehicle registration number and a quick note on the fault. Our JLR specialist technicians check your exact engine code, year and 48V setup first. You get a fixed quote with no hidden fees, up to a 12-month warranty and support before and after fitting.

Used, Reconditioned and Rebuilt Jaguar AJ20D6 Engines

Mayfair Rebuilds gives you three clear Jaguar AJ20D6 engine options to suit your car, mileage, and repair goals. Tested used AJ20D6 engines come from verified UK donor cars and pass compression and leak-down tests before dispatch. Used units suit older cars and include a clear basic warranty.

Reconditioned Jaguar AJ20D6 engines are stripped, cleaned, and built back to OEM standards with worn parts replaced for daily high-mileage cars. Rebuilt Jaguar AJ20D6 engines go right back to the bare cylinder block for precision machining, new piston rings, bearings, gaskets, and timing chains. Your quote depends on model year, core condition, stock availability, and fitting options.

Jaguar AJ20D6 Engine Supply, Fitting and UK Mainland Delivery

Every Jaguar AJ20D6 engine replacement at Mayfair Rebuilds follows four clear workshop steps: fault check, code check, engine preparation, and handover. Land Rover models share the AJ20D6 family code, yet the Jaguar F-Pace X761 uses its own sump, mounts, wiring harness, and turbo layout.

Our technicians check your registration, VIN, ECU, and DPF setup before any engine leaves the bench. You can buy supply only with secure pallet delivery to your own UK garage. You can also book our full supply and fit service, which covers nationwide vehicle collection, workshop fitting, fresh fluids, ECU injector coding, road testing, and handover.

Why UK Jaguar Drivers Choose Mayfair Rebuilds

Mayfair Rebuilds brings more than 25 years of hands-on Jaguar, Land Rover, and Range Rover engine experience under one roof. Our UK technicians strip, machine, build, and test every Jaguar AJ20D6 engine in-house instead of sending out unchecked stock. Every unit passes oil pressure, compression, leak-down, and dynamic tests before release.

One accountable team handles your quote, code match, build, delivery, and aftercare. Every used, reconditioned, and rebuilt engine comes with up to 12 months warranty for real confidence on the road. Enter your UK vehicle registration now for a fast, honest quote with no obligation.

Frequently Asked Questions

Common Questions Answered

Everything you need to know about our engine replacement, rebuild and supply process.

The AJ20D6 engine fits the Jaguar F-Pace X761 D300 3.0-litre mild-hybrid diesel from late 2020 onwards. Land Rover models use related AJ20D6 blocks, so Mayfair Rebuilds checks your VIN because sumps and mounts differ.
Jaguar AJ20D6 engine prices depend on your build year, core damage, stock availability, and the used, reconditioned, or rebuilt route you choose. Supply only and complete supply and fit packages at Mayfair Rebuilds are quoted directly against your vehicle registration.
Yes. Rebuilt AJ20D6 engines go back to the bare block for machining and get new piston rings, bearings, gaskets, and timing chains. Every unit passes compression, oil pressure, and leak-down tests at Mayfair Rebuilds before release.
Yes. Mayfair Rebuilds delivers palletised Jaguar AJ20D6 engines across the UK mainland for local garages or carries out full supply and fit work in-house.
A used AJ20D6 engine is a tested UK donor unit for lower budgets. A reconditioned unit gets new OEM-spec wear parts, while a rebuilt engine receives full strip-down, block and head machining, and new internal components.
Yes, the 3.0-litre straight-six AJ20D6 has fewer timing chain failures than early 2.0-litre Ingenium diesels. Short UK town journeys can still cause DPF oil dilution, EGR cooler splits, and oil filter housing leaks if left unchecked.
Yes. After fitting an AJ20D6 engine, technicians use JLR TOPIx Cloud diagnostics to code fuel injector trim values, reset DPF and oil dilution counters, and check the 48V mild-hybrid system for smooth running.
Most Jaguar AJ20D6 supply and fit jobs take five to ten working days once the code-matched unit is ready. Exact turnaround depends on workshop booking slots and core engine condition.
Every Jaguar AJ20D6 engine supplied or fitted by Mayfair Rebuilds includes up to 12 months warranty cover. The exact length depends on the used, reconditioned, or rebuilt route chosen, and includes post-fit technical support.
Send your registration number or 17-character VIN to Mayfair Rebuilds. Our technicians check your build year, ECU code, DPF setup, and 48V mild-hybrid hardware before sending a fixed, no-obligation quote.