How much does a Land Rover Defender 90 D300 engine replacement cost-

A rebuilt Land Rover Defender 90 D300 (DT306) engine typically costs between £5,500 and £8,500 for supply only, while reconditioned units start from £4,500.

What are the signs of DT306 engine failure in a Land Rover Defender 90 D300-

Owners often report a metallic rattle on cold start (timing chain), sudden loss of power, or frequent “Check Engine” lights related to misfires or oil pressure.

Is it worth replacing the engine in a 2020+ Land Rover Defender 90 D300-

Yes-modern Defender 90 D300 models retain very strong values, typically between £45,000 and £70,000.

How long does a Land Rover Defender 90 D300 engine replacement take-

A standard supply and fit service for the Land Rover Defender 90 D300 typically takes 3 to 4 days.

Does the DT306 engine replacement retain the 48V mild-hybrid system-

Yes-every rebuilt or reconditioned DT306 engine supplied through EnginesMarket is fully compatible with the L663’s 48V MHEV architecture.

Land Rover Defender 90 D300 SPECIALISTS

Land Rover Defender 90 D300 Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK Land Rover Defender 90 D300 engine specialists. Compare prices on reconditioned, rebuilt and used engines to find the most reliable and cost-effective solution for your modern L663 Defender.

Supply & Fit Available

12-Month Warranty

Nationwide Delivery

100+ Suppliers

Land Rover Defender 90 D300 Engine

from£5,500 to £8,500...

Usedfrom £2,500
Reconditionedfrom £4,500
Common codesDT306

Land Rover defender-90 D300 Used Engine — DT306

Land Rover defender-90Used Engine — DT306

Land Rover defender-90 D300 Reconditioned Engine — DT306

Land Rover defender-90Reconditioned Engine — DT306

Land Rover defender-90 D300 Rebuilt Engine — DT306

Land Rover defender-90Rebuilt Engine — DT306

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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 Defender 90 D300 Engine History & Specs at a Glance

When the Land Rover Defender 90 D300 launched as part of the new L663 generation in 2020, it brought cutting-edge Ingenium mild-hybrid diesel technology to the iconic short-wheelbase platform, combining 300hp performance with enhanced efficiency and torque.

2020
DT306 (3.0L MHEV Diesel), 300hp, introduced as part of the all-new L663 Defender lineup, featuring an integrated 48V mild-hybrid system, twin-turbocharging, and advanced emissions controls.
2023
present - Minor ECU and calibration updates; core DT306 architecture remains unchanged across model years.

Every engine fitted to the Land Rover Defender 90 D300 is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Land Rover Defender 90 D300 Engine Codes Specifications & Replacement Cost

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

DT306 — 3.0L Diesel Mild Hybrid (2020-present)

Power Output: 300hp
Years Fitted: 2020-present

Can’t find your exact engine code?-> Get quotes for DT306 Land Rover Defender 90 D300 engine replacement

-> Get quotes for DT306 Land Rover Defender 90 D300 engine replacement

Common failure points and repair options

Timing Chain Tensioner Failure

Affected: Land Rover Defender 90 D300 (DT306, 2020-present)
Typical failure mileage: 60,000-120,000 miles

Root cause

Early-production DT306 units used a tensioner design prone to premature wear, leading to chain rattle, misfires, and potential catastrophic engine damage if ignored.

Repair options

Repair tier	Dealer price	Specialist price
Preventative Timing Chain Kit	£1,800-£2,800	£1,200-£2,000
Full Replacement - rebuilt/reconditioned engine	£7,000-£10,000	£5,500-£8,500 [EM-QUOTE]

Our recommendation

For pre-2022 DT306 units with under 60,000 miles, a preventative timing chain upgrade is strongly advised. However, if chain noise, oil dilution, or misfires are already present, a full rebuilt engine with upgraded internals offers the best long-term reliability and preserves your high-value Defender investment.

Oil Dilution & PCV System Issues

Affected: Land Rover Defender 90 D300 (DT306, 2020-present)
Typical failure mileage: 50,000-100,000 miles

Root cause

Frequent short-trip driving triggers aggressive DPF regenerations, washing unburnt fuel into the crankcase and overwhelming the PCV system, leading to sludge buildup and bearing wear.

Repair options

Repair tier	Dealer price	Specialist price
PCV System Flush & Oil Service	£400-£800	£300-£600
Full Replacement - rebuilt/reconditioned engine	£7,000-£10,000	£5,500-£8,500 [EM-QUOTE]

Our recommendation

-> Compare rebuilt DT306 Land Rover Defender 90 D300 engine prices

Don't Let Engine Failure Write Off Your Land Rover Defender 90 D300

Don’t risk a costly chain failure ruining your premium L663 Defender. By comparing quotes through EnginesMarket, you secure a rebuilt or reconditioned DT306 engine with upgraded timing components and a verified MHEV-compatible calibration, all backed by a comprehensive 12-month unlimited mileage warranty. Avoid main dealer premiums and benefit from nationwide supply and fit options tailored to your exact vehicle.

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FAQ

Land Rover Defender 90 D300 Engine ReplacementFrequently Asked Questions

Everything Land Rover Defender 90 D300 owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Why Choose Us

Compare Land Rover Defender 90 D300 Engine Prices Today

Don’t overpay at the main dealer. Comparing quotes through EnginesMarket is 100% free and no-obligation, connecting you directly with vetted UK specialists who hold verified, warranty-backed replacement engines specifically for your Land Rover Defender 90 D300.

150+150+ Land Rover Defender 90 D300 engines supplied through our network

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