How much does a Land Rover Discovery TD6 engine replacement cost-

A fully rebuilt Land Rover Discovery TD6 engine typically costs between £7,500 and £11,000 for supply only, with supply and fit packages ranging higher depending on the specialist. - Supply-only rebuilt (306DT): £7,500-£11,000 [EM-QUOTE] - Supply & fit: £9,500-£13,000 [ESTIMATED] - Always ensure the quote includes a minimum 12-month warranty.

What are the signs of crankshaft bearing failure in a Land Rover Discovery TD6 (306DT)-

The 306DT V6 is prone to bearing fatigue. Early warning signs include a distinct rhythmic knocking noise from the bottom end on cold startup, low oil pressure warnings, or sudden loss of power. - Listen for a deep knocking sound during the first few seconds of engine startup. - Monitor the dashboard for low oil pressure warnings. - Address any unusual engine noises immediately to prevent catastrophic seizure.

Land Rover Discovery TD6 SPECIALISTS

Land Rover Discovery TD6 Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK Land Rover Discovery TD6 engine specialists. Compare prices on reconditioned, rebuilt and used engines to ensure a reliable and cost-effective replacement for your premium 7-seater 4x4.

Supply & Fit Available

12-Month Warranty

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Land Rover Discovery TD6 Engine

from£7,500 to £11,00...

Usedfrom £3,500
Reconditionedfrom £6,500
Common codes306DT, AJ30D6

Land Rover discovery TD6 Used Engine — 306DT

Land Rover discoveryUsed Engine — 306DT

Land Rover discovery TD6 Reconditioned Engine — 306DT

Land Rover discoveryReconditioned Engine — 306DT

Land Rover discovery TD6 Rebuilt Engine — 306DT

Land Rover discoveryRebuilt Engine — 306DT

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How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

Land Rover Discovery TD6 Engine History & Specs at a Glance

When the Discovery 5 (L462) launched with the TD6 badge, it offered a potent 3.0L V6 diesel, later transitioning to the newer, more efficient Ingenium inline-six diesel architecture to meet stricter emissions and refinement standards while maintaining exceptional towing capability.

2017
306DT (3.0L V6 Diesel), 258PS (Initial Discovery 5 launch, carrying over the established V6 architecture).
2020
AJ30D6 (3.0L Inline-6 Ingenium Diesel), 258PS-300PS (Major architecture shift to an inline-six with 48V mild-hybrid technology, resolving many V6 packaging and oiling issues).

Every engine fitted to the Land Rover Discovery TD6 is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Land Rover Discovery TD6 Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

306DT — 3.0L V6 Diesel (2017-2020)

Power Output: 258PS
Years Fitted: 2017-2020

Can’t find your exact engine code?-> Get quotes for 306DT Land Rover Discovery TD6 engine replacement

-> Get quotes for 306DT Land Rover Discovery TD6 engine replacement

Common failure points and repair options

Crankshaft Bearing & Oil Pump Failure

Affected: Land Rover Discovery TD6 (306DT, 2017-2020)
Typical failure mileage: 60,000-100,000 miles

Root cause

Tin-aluminium coating fatigue on the crankshaft bearings, exacerbated by oil pump starvation, leading to sudden and catastrophic engine seizure.

Repair options

Repair tier	Dealer price	Specialist price
Oil Pump Replacement & Bearing Inspection	£2,000-£3,000	£1,000-£1,800
Full Replacement - rebuilt/reconditioned engine	£9,500-£13,000	£7,500-£11,000

Our recommendation

If cold-start knocking is present, do not attempt a minor repair. A full rebuild or replacement with a revised block is the only safe path to prevent imminent catastrophic failure.

-> Compare rebuilt 306DT Land Rover Discovery TD6 engine prices

EGR Cooler Leaks & Mild-Hybrid Electrical Faults

Affected: Land Rover Discovery TD6 (AJ30D6, 2020-present)
Typical failure mileage: 40,000-80,000 miles

Root cause

EGR cooler internal leaks contaminating the intake, alongside complex 48V mild-hybrid system component failures triggering limp mode.

Repair options

Repair tier	Dealer price	Specialist price
EGR Cooler Replacement & Software Update	£1,500-£2,500	£800-£1,500
Full Replacement - rebuilt/reconditioned engine	£10,500-£14,000	£8,000-£12,000

Our recommendation

For isolated EGR or electrical faults, specialist repair is cost-effective. For extensive internal damage, a rebuilt unit provides a comprehensive, warrantied reset.

-> Compare rebuilt AJ30D6 Land Rover Discovery TD6 engine prices

Don't Let Engine Failure Write Off Your Land Rover Discovery TD6

Protect your premium investment with a rebuilt engine that addresses the TD6's known weaknesses. Every engine supplied through our network features upgraded components, comes with a minimum 12-month unlimited mileage warranty, and is available with nationwide supply and fit to get your Discovery back on the road.

Compare Land Rover Discovery TD6 Engine Replacement Prices Now ->

FAQ

Land Rover Discovery TD6 Engine ReplacementFrequently Asked Questions

Everything Land Rover Discovery TD6 owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

A fully rebuilt Land Rover Discovery TD6 engine typically costs between £7,500 and £11,000 for supply only, with supply and fit packages ranging higher depending on the specialist.

Supply-only rebuilt (306DT): £7,500-£11,000 [EM-QUOTE]
Supply & fit: £9,500-£13,000 [ESTIMATED]
Always ensure the quote includes a minimum 12-month warranty.

-> Compare Land Rover Discovery TD6 engine replacement quotes today.

The 306DT V6 is prone to bearing fatigue. Early warning signs include a distinct rhythmic knocking noise from the bottom end on cold startup, low oil pressure warnings, or sudden loss of power.

Listen for a deep knocking sound during the first few seconds of engine startup.
Monitor the dashboard for low oil pressure warnings.
Address any unusual engine noises immediately to prevent catastrophic seizure.

-> If you notice these symptoms, get a Land Rover Discovery TD6 engine quote immediately.

Yes, the AJ30D6 inline-six architecture resolved the catastrophic bottom-end bearing issues inherent to the 306DT V6 design. However, as a newer, more complex mild-hybrid system, it requires strict adherence to service intervals to prevent EGR and electrical faults.

The inline-six design eliminates the V6 oiling and packaging flaws.
Mild-hybrid components require specialist diagnostic equipment.
Rebuilt AJ30D6 units include updated EGR and electrical components.

-> Check Land Rover Discovery TD6 rebuilt engine prices now.

Yes, investing in a rebuilt engine is financially sound. With Land Rover Discovery TD6 values currently ranging from £25,000 to over £60,000 depending on year and specification, a £7,500-£11,000 replacement is a small fraction of the vehicle's worth and preserves this premium asset.

Premium Discovery values easily absorb rebuild costs.
A rebuilt engine resets the mechanical lifespan with upgraded components.
Upgraded parts prevent repeat failures.

-> Get quotes for direct-fit Land Rover Discovery TD6 engines here.

A standard supply and fit service for a Land Rover Discovery TD6 typically takes 3 to 5 days at a specialist workshop. The complex 48V mild-hybrid system (on newer models) and tight engine bay require meticulous removal and calibration.

Removal and installation: 2-3 days.
Fluid top-up, system bleeding, and ECU calibration: 1-2 days.
Always confirm turnaround times with your chosen specialist.

-> Book your Land Rover Discovery TD6 supply and fit service today.

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