How much does a Land Rover Discovery TD5 engine replacement cost-

A complete rebuilt Land Rover Discovery TD5 engine typically costs between £2,500 and £4,000 for supply only [THIRD-PARTY]. Used runner units start from around £800. Reconditioned units range from £1,500 to £2,500. Prices vary based on the specific TD5 10P or 15P engine code and inclusion of steel dowel upgrades.

What are the signs of head gasket failure in a Discovery TD5-

Early warning signs of the plastic dowel head gasket failure include unexplained coolant loss without visible external leaks. Mayonnaise-like sludge under the oil filler cap. White exhaust smoke under heavy load or during cold starts. Overheating during slow off-road or towing work.

Is it worth replacing the engine in a classic Land Rover Discovery TD5-

Yes, for well-maintained examples. The Land Rover Discovery TD5 is a highly capable classic 4x4 with current market values ranging from £2,500 to over £7,000 [THIRD-PARTY]. A rebuilt engine cost is a sensible fraction of the vehicle's total value if the chassis is solid. It preserves the car's heritage, heavy-duty towing capability, and resale value. Upgraded rebuilt units eliminate the factory plastic dowel flaw permanently.

What is the difference between the TD5 10P and 15P engines-

The TD5 10P (1998-2002) is the original version of the 2.5L inline-five diesel. The TD5 15P (2002-2004) introduced revised engine management, an updated sealed injector harness to prevent ECU oil contamination, and factory-fitted steel locating dowels to prevent head gasket failure. Both share the same robust bottom end and benefit equally from reliability upgrades.

Do rebuilt TD5 engines include the steel dowel and injector loom upgrades-

Yes, any reputable specialist rebuilding a Land Rover Discovery TD5 engine will machine the block to accept aftermarket steel locating dowels and fit an updated, sealed injector harness. This entirely eliminates the plastic dowel deformation and ECU oil contamination issues. It ensures the cylinder head remains perfectly aligned under heavy towing loads. These upgrades are considered mandatory for any long-term TD5 build.

Land Rover Discovery TD5 SPECIALISTS

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Get quotes today from trusted UK Land Rover Discovery TD5 engine specialists. Compare prices on reconditioned, rebuilt and used engines to restore your classic 4x4's legendary reliability and off-road capability.

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Land Rover Discovery TD5 Engine

from£1,500 to £3,500...

Usedfrom £800
Reconditionedfrom £1,500
Common codesTD5 10P, TD5 15P

Land Rover discovery TD5 Used Engine — TD5 10P

Land Rover discoveryUsed Engine — TD5 10P

Land Rover discovery TD5 Reconditioned Engine — TD5 10P

Land Rover discoveryReconditioned Engine — TD5 10P

Land Rover discovery TD5 Rebuilt Engine — TD5 10P

Land Rover discoveryRebuilt Engine — TD5 10P

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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 TD5 Engine History & Specs at a Glance

Launched in 1998, the Land Rover Discovery TD5 (Series II) replaced the rugged 200Tdi with a more refined, electronically controlled 2.5-litre inline-five diesel, offering improved emissions and drivability while retaining legendary off-road capability.

1998
TD5 10P (2.5L Diesel), 122hp, launched in the Discovery Series II, featuring electronic injection and improved refinement over the outgoing 200Tdi.
2002
TD5 15P (2.5L Diesel), 122hp, introduced with revised engine management, an updated injector harness (to prevent oil migration to the ECU), and steel locating dowels to prevent head gasket failure.

Every engine fitted to the Land Rover Discovery TD5 is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Land Rover Discovery TD5 Engine Codes Specifications & Replacement Cost

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

TD5 10P — 2.5L Diesel (1998-2002)

Power Output: 122hp
Years Fitted: 1998-2002

Can’t find your exact engine code?-> Get quotes for TD5 10P Land Rover Discovery TD5 engine replacement

-> Get quotes for TD5 10P Land Rover Discovery TD5 engine replacement

Common failure points and repair options

Head Gasket Failure & Plastic Dowel Weakness

Affected: Land Rover Discovery TD5 (TD5 10P / 15P, 1998-2004)
Typical failure mileage: 80,000-150,000 miles

Root cause

Land Rover originally used plastic locating dowels to align the cylinder head. Over time and repeated heat cycles, these plastic dowels deform and collapse, allowing the head to shift slightly under combustion pressures, which inevitably blows the head gasket.

Repair options

Repair tier	Dealer price	Specialist price
Preventative Head Gasket & Steel Dowel Upgrade	£1,800-£2,500	£1,200-£1,800
Full Replacement - rebuilt/reconditioned engine	£3,500-£5,500	£2,500-£4,000 [THIRD-PARTY]

Our recommendation

If caught before catastrophic mixing of fluids, a specialist head gasket replacement paired with the mandatory steel dowel upgrade is the most cost-effective and permanent route. However, if the engine has been run with low coolant or exhibits bottom-end bearing knock, investing in a fully rebuilt unit is the safest way to guarantee the next 100,000 miles of reliability.

-> Compare rebuilt TD5 10P Land Rover Discovery TD5 engine prices

Injector Loom Oil Leak

Affected: Land Rover Discovery TD5 (TD5 10P primarily, 1998-2002)
Typical failure mileage: 60,000-120,000 miles

Root cause

The injector wiring harness seal degrades over time, allowing engine oil to wick up the loom via capillary action and pool inside the Engine Control Unit (ECU), causing catastrophic electrical failure.

Repair options

Repair tier	Dealer price	Specialist price
Injector Loom & ECU Repair	£800-£1,500	£400-£800
Full Replacement - rebuilt/reconditioned engine	£3,500-£5,500	£2,500-£4,000 [THIRD-PARTY]

Our recommendation

Proactive replacement of the injector loom with an updated, sealed harness is a highly recommended, low-cost preventative measure. If the ECU has already been destroyed by oil contamination, factor the ECU replacement cost into your overall repair or engine replacement budget.

-> Compare rebuilt TD5 15P Land Rover Discovery TD5 engine prices

Don't Let Engine Failure Write Off Your Land Rover Discovery TD5

Protect your classic workhorse with a fully rebuilt Land Rover Discovery TD5 engine. Our network supplies units with upgraded steel dowels and sealed injector looms that address known factory weaknesses, backed by a minimum 12-month unlimited-mileage warranty and nationwide delivery. Avoid main dealer premiums by comparing transparent, itemised quotes from vetted UK classic Land Rover specialists today.

Compare Land Rover Discovery TD5 Engine Replacement Prices Now ->

FAQ

Land Rover Discovery TD5 Engine ReplacementFrequently Asked Questions

Everything Land Rover Discovery TD5 owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Yes, for well-maintained examples. The Land Rover Discovery TD5 is a highly capable classic 4x4 with current market values ranging from £2,500 to over £7,000 [THIRD-PARTY].

A rebuilt engine cost is a sensible fraction of the vehicle's total value if the chassis is solid.
It preserves the car's heritage, heavy-duty towing capability, and resale value.
Upgraded rebuilt units eliminate the factory plastic dowel flaw permanently.

-> Secure your investment with a rebuilt Land Rover Discovery TD5 engine.

The TD5 10P (1998-2002) is the original version of the 2.5L inline-five diesel.

The TD5 15P (2002-2004) introduced revised engine management, an updated sealed injector harness to prevent ECU oil contamination, and factory-fitted steel locating dowels to prevent head gasket failure.
Both share the same robust bottom end and benefit equally from reliability upgrades.

-> Enter your registration to confirm which TD5 variant is fitted to your Land Rover Discovery TD5.

Yes, any reputable specialist rebuilding a Land Rover Discovery TD5 engine will machine the block to accept aftermarket steel locating dowels and fit an updated, sealed injector harness.

This entirely eliminates the plastic dowel deformation and ECU oil contamination issues.
It ensures the cylinder head remains perfectly aligned under heavy towing loads.
These upgrades are considered mandatory for any long-term TD5 build.

-> Book your Land Rover Discovery TD5 supply and fit appointment now.

Why Choose Us

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Comparing quotes for your Land Rover Discovery TD5 is completely free and carries no obligation. By entering your registration, you ensure that every quote you receive is precisely matched to your specific TD5 10P or 15P engine code, guaranteeing compatibility and peace of mind from vetted UK classic Land Rover specialists.

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