Land Rover Discovery D300 Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK Land Rover Discovery D300 engine specialists. Compare prices on reconditioned, rebuilt and used engines to secure the best supply and fit solution for your vehicle.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £7,500 to £11,000 [EM-QUOTE]
Used from £3,500 · Reconditioned from £6,500 · Common codes: 306DT
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 D300 specialists.
3 Simple Steps3 Simple Stepsto Finding the Best Land Rover Discovery D300 Replacement Engineto Finding the Best Land Rover Discovery D300 Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryLand Rover Discovery D300 - Engine History & Specs at a Glance
When the D300 variant launched in the L462 generation, it brought a refined 300PS 3.0-litre inline-six diesel to the Discovery range, replacing older nomenclature with a clear power-based badge. Its engine has since evolved to include mild-hybrid technology for improved efficiency.
Variant HistoryLand Rover Discovery D300 - Engine History & Specs at a Glance
When the D300 variant launched in the L462 generation, it brought a refined 300PS 3.0-litre inline-six diesel to the Discovery range, replacing older nomenclature with a clear power-based badge. Its engine has since evolved to include mild-hybrid technology for improved efficiency.
Land Rover Discovery D300
Fuel TypeDiesel (MHEV from 2020)
Engine Size Range3.0L
Power Output Range300 PS (296 bhp / 221 kW)Engine History Timeline
306DT 3.0L Inline-6 Diesel, 300 PS (Introduction of the D300 powertrain to the L462 Discovery range, featuring twin-turbocharging and advanced emissions controls).
306DT (MHEV) 3.0L Inline-6 Diesel MHEV, 300 PS (Integration of 48V mild-hybrid technology to improve fuel efficiency, refine the stop-start system, and support ancillary loads).
Key Specs Snapshot
Fuel TypeDiesel (MHEV from 2020)Engine Size Range3.0LPower Output Range300 PS (296 bhp / 221 kW)Years Produced2017-presentEvery engine fitted to the Land Rover Discovery D300 is covered below, with UK rebuilt pricing and known failure points.
Land Rover Discovery D300 Engine Codes - Specifications & Replacement CostLand Rover Discovery D300 Engine Codes - Specifications & Replacement Cost
3.0L Diesel (2017-present)
Power Output300 PS (296 bhp)Years Fitted2017-present
Compatible Trim Levels
- Discovery D300 S
- Discovery D300 SE
- Discovery D300 HSE
- Discovery D300 R-Dynamic
- Discovery D300 First Edition
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£3,500-£5,500 [EM-QUOTE]
Reconditioned
Addressed known issues, tested
£6,500-£9,500 [EM-QUOTE]
Rebuilt
Full teardown, upgraded internals
£7,500-£11,000 [EM-QUOTE]
Common Failure
Crankshaft bearing failure (due to tin-aluminium coating fatigue), oil pump issues, and turbo contamination are the most documented issues for this 3.0L architecture.
The Land Rover Discovery D300 is a capable, modern inline-six diesel designed for heavy loads and towing. However, its 3.0L architecture is susceptible to specific bottom-end and lubrication issues. 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 D300 306DT Suffers Premature Wear
Affected Vehicles
Land Rover Discovery D300 (306DT, 2017-present)
Typical Failure Mileage
80,000-140,000 miles
Root Cause
The tin-aluminium coating on the crankshaft bearings can fatigue under high load or poor oil maintenance, while the oil pump can suffer from premature wear, leading to catastrophic bottom-end failure.
Why It Happens
The tin-aluminium coating on the crankshaft bearings can fatigue under high load or poor oil maintenance, while the oil pump can suffer from premature wear, leading to catastrophic bottom-end failure.
Dealer (parts + labour)
£2,500-£4,000
Specialist (parts + labour)
£1,500-£2,500
What it involves
Dropping the sump, replacing the oil pump, and inspecting bearing clearances.
Suitability
Effective only if caught at the very first sign of cold-start knock or low oil pressure.
1 - 2 daysDealer (parts + labour)
£11,000-£15,000
Specialist (parts + labour)
£7,500-£11,000 [EM-QUOTE]
What it involves
Supply & fit, upgraded components addressing the original failure point, 12-month warranty.
Suitability
The right call if the engine has suffered catastrophic bearing failure or block damage.
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 |
|---|---|---|---|---|---|
 Minor/Preventative (Oil pump replacement + bearing inspection) Minor | £2,500-£4,000 | £1,500-£2,500 | Dropping the sump, replacing the oil pump, and inspecting bearing clearances. | Effective only if caught at the very first sign of cold-start knock or low oil pressure. | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £11,000-£15,000 | £7,500-£11,000 [EM-QUOTE] | Supply & fit, upgraded components addressing the original failure point, 12-month warranty. | The right call if the engine has suffered catastrophic bearing failure or block damage. | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical Land Rover Discovery D300 (L462) is worth £25,000-£55,000+ `[THIRD-PARTY]`. At this value, a rebuilt engine replacement cost is a small fraction of the vehicle's overall value, making replacement highly viable to preserve the asset.
Our Recommendation
Our Recommendation
If the issue is strictly early-stage oil pressure fluctuation, a specialist oil pump replacement and thorough inspection is the most cost-effective fix. However, if there is accompanying engine knock, loss of compression, or internal damage, a fully rebuilt unit with all known vulnerabilities addressed is the safest long-term choice for a vehicle of this caliber.
Don't Let Engine Failure Write Off Your Land Rover Discovery D300
Protect your investment with a rebuilt engine that includes upgraded components, a comprehensive 12-month unlimited mileage warranty, and nationwide supply & fit delivery. Comparing specialist quotes ensures you avoid main dealer premiums while securing precision engineering for your high-performance Discovery.
Compare rebuilt 306DT Land Rover Discovery D300 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 D300. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Land Rover Discovery D300 Engine ReplacementFrequently Asked Questions
Question 1How much does a Land Rover Discovery D300 engine replacement cost-
A reconditioned or rebuilt 306DT engine for the Land Rover Discovery D300 typically ranges from £6,500 to £11,000 for supply only, depending on the condition and specialist.
- Rebuilt units include upgraded components and a warranty.
- Supply and fit labour will add approximately £1,000-£1,500 depending on the workshop.
Question 2What are the signs of crankshaft bearing failure in a Land Rover Discovery D300-
Early signs include a distinct knocking noise from the bottom end on cold startup or a sudden drop in oil pressure.
- You may also notice a loss of power, rough idling, or illuminated engine management lights.
- Ignoring these signs can lead to catastrophic internal engine damage.
Question 3Is it worth replacing the engine in a modern Land Rover Discovery D300-
Yes, given the high retained value of the L462 Discovery D300 (typically £25,000+), a rebuilt engine is a financially sound investment.
- A rebuilt unit restores factory performance and includes a 12-month warranty.
- It is significantly more cost-effective than purchasing a new vehicle.
Question 4How long does a Land Rover Discovery D300 engine replacement take-
A professional supply and fit service for the 306DT engine typically takes 2 to 4 days.
- This includes engine removal, thorough bay cleaning, installation of the replacement unit, and comprehensive ECU calibration.
- Nationwide delivery of the replacement engine can be arranged to your chosen specialist.
Question 5What is the difference between a used and a rebuilt Land Rover Discovery D300 engine-
A used engine is a direct salvage unit with unknown history and limited warranty coverage.
- A rebuilt engine is fully stripped, cleaned, and fitted with new or upgraded components (such as updated bearing shells and oil pumps).
- Rebuilt engines come with a minimum 12-month unlimited mileage warranty, offering superior peace of mind.
Why Choose UsCompare Land Rover Discovery D300Engine PricesToday
50+ Land Rover Discovery D300 engines supplied through our network
12-Month Warranty on every rebuilt Land Rover Discovery D300 engine
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