How 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.

What 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.

Is 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.

How 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.

What 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.

LAND ROVER DISCOVERY D300 SPECIALISTS

Land Rover Discovery D300 Engine Replacement Compare 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.

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Land Rover Discovery D300 Engine

from£7,500 to £11,00...

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

Land Rover discovery D300 Used Engine — 306DT

Land Rover discoveryUsed Engine — 306DT

Land Rover discovery D300 Reconditioned Engine — 306DT

Land Rover discoveryReconditioned Engine — 306DT

Land Rover discovery D300 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 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.

2017
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).
2020
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).

Every engine fitted to the Land Rover Discovery D300 is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Land Rover Discovery D300 Engine Codes Specifications & Replacement Cost

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

306DT — 3.0L Diesel (2017-present)

Power Output: 300 PS (296 bhp)
Years Fitted: 2017-present

Can’t find your exact engine code?-> Get quotes for 306DT Land Rover Discovery D300 engine replacement

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Common failure points and repair options

Crankshaft Bearing & Oil Pump Failure

Affected: 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.

Repair options

Repair tier	Dealer price	Specialist price
Minor/Preventative (Oil pump replacement + bearing inspection)	£2,500-£4,000	£1,500-£2,500
Full Replacement - rebuilt/reconditioned engine	£11,000-£15,000	£7,500-£11,000 [EM-QUOTE]

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.

-> Compare rebuilt 306DT Land Rover Discovery D300 engine prices

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.

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FAQ

Land Rover Discovery D300 Engine ReplacementFrequently Asked Questions

Everything Land Rover Discovery D300 owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Why Choose Us

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Comparing quotes is completely free and carries no obligation. By entering your registration, you ensure that every quote you receive is precisely matched to your Land Rover Discovery D300 and its specific 306DT engine code, connecting you directly with vetted UK specialists who understand high-performance modern Discovery replacements.

50+50+ Land Rover Discovery D300 engines supplied through our network

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