Land Rover Discovery TD6 Engine ReplacementCompare 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
Nationwide Delivery
100+ Suppliers
From £7,500 to £11,000
Used from £3,500 · Reconditioned from £6,500 · Common codes: 306DT, AJ30D6
From £3,500
Tested, bare/short engine
From £6,500
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
Secure enquiry - no spam, no pressure. Genuine quotes only from vetted UK Land Rover Discovery TD6 specialists.
3 Simple Steps3 Simple Stepsto Finding the Best Land Rover Discovery TD6 Replacement Engineto Finding the Best Land Rover Discovery TD6 Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryLand 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.
Variant HistoryLand 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.
Land Rover Discovery TD6
Fuel TypeDiesel
Engine Size Range3.0L (2997cc)
Power Output Range258PS-300PS (D250 / D300)Engine History Timeline
306DT (3.0L V6 Diesel) 258PS (Initial Discovery 5 launch, carrying over the established V6 architecture).
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).
Key Specs Snapshot
Fuel TypeDieselEngine Size Range3.0L (2997cc)Power Output Range258PS-300PS (D250 / D300)Years Produced2017-presentEvery engine fitted to the Land Rover Discovery TD6 is covered below, with UK rebuilt pricing and known failure points.
Land Rover Discovery TD6 Engine Codes - Specifications & Replacement CostLand Rover Discovery TD6 Engine Codes - Specifications & Replacement Cost
3.0L V6 Diesel (2017-2020)
Power Output258PSYears Fitted2017-2020
Compatible Trim Levels
- Discovery TD6
- Discovery HSE
- Discovery HSE Luxury
- Discovery First Edition
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£3,500-£5,500
Reconditioned
Addressed known issues, tested
£6,500-£9,500
Rebuilt
Full teardown, upgraded internals
£7,500-£11,000
Common Failure
Crankshaft bearing failure (tin-aluminium coating fatigue) and oil pump issues leading to catastrophic bottom-end failure, typically presenting as a cold-start knock.
The Land Rover Discovery TD6 is a powerful and capable engine, but the earlier 306DT V6 is notorious for catastrophic bottom-end failures. The newer AJ30D6 inline-six resolved many of these issues but introduced complex mild-hybrid components. Rebuilt engines through EnginesMarket include upgraded components addressing these original failure points, plus a minimum 12-month unlimited-mileage warranty.
Why the Land Rover Discovery TD6 (306DT) Seizes Prematurely
Affected Vehicles
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.
Why It Happens
Tin-aluminium coating fatigue on the crankshaft bearings, exacerbated by oil pump starvation, leading to sudden and catastrophic engine seizure.
Dealer (parts + labour)
£2,000-£3,000
Specialist (parts + labour)
£1,000-£1,800
What it involves
Replace oil pump and inspect bearings via sump removal.
Suitability
Only viable if caught *before* any knocking or performance loss occurs.
1 - 2 daysDealer (parts + labour)
£9,500-£13,000
Specialist (parts + labour)
£7,500-£11,000
What it involves
Supply & fit of a fully rebuilt 306DT or upgraded AJ30D6, plus 12-month warranty.
Suitability
The only reliable solution once bearing wear or knocking is detected.
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Oil Pump Replacement & Bearing Inspection Minor | £2,000-£3,000 | £1,000-£1,800 | Replace oil pump and inspect bearings via sump removal. | Only viable if caught *before* any knocking or performance loss occurs. | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £9,500-£13,000 | £7,500-£11,000 | Supply & fit of a fully rebuilt 306DT or upgraded AJ30D6, plus 12-month warranty. | The only reliable solution once bearing wear or knocking is detected. | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical Land Rover Discovery TD6 (2017-2020) currently holds a value of £25,000-£45,000 in the UK [THIRD-PARTY]. A £7,500-£11,000 rebuilt engine replacement is well within the vehicle's value band. Flag: Safe.
Our Recommendation
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.
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 rebuilt 306DT Land Rover Discovery TD6 engine prices
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific Land Rover Discovery TD6. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier.
Land Rover Discovery TD6 Engine ReplacementFrequently Asked Questions
Question 1How 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.
Question 2What 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.
Question 3Is the newer AJ30D6 inline-six engine more reliable than the older 306DT V6-
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.
Question 4Is it worth replacing the engine in a Land Rover Discovery TD6-
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.
Question 5How long does a Land Rover Discovery TD6 engine replacement take-
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.
Why Choose UsCompare Land Rover Discovery TD6Engine PricesToday
500+ Premium Discovery engines supplied through our network
12-Month Warranty on every rebuilt Land Rover Discovery TD6 engine
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