Land Rover Fuel System Parts

Category Overview

Land Rover Fuel System Parts: Pumps, Injectors and Filtration

The Land Rover fuel system splits into a low-pressure supply stage and a high-pressure injection stage on every diesel from the Td5 onwards. Tank-mounted lift pumps feed the high-pressure pump, the rail holds fuel under pressure until the injectors meter it into the cylinders, and excess fuel returns to the tank via the regulator and cooler. Petrol Series and Range Rover V8 platforms use simpler mechanical or electric supply systems with no high-pressure stage, but the same buying logic applies: the supply circuit and the filtration upstream of it set the lifetime of every component downstream.

Different generations fail in different places. On the Td5 (Discovery 2 and Defender), the in-tank lift pump degrades acoustically before it fails outright, and the fuel pressure regulator block on the rear of the cylinder head leaks diesel internally as the seal hardens. On the Discovery 3 and Range Rover Sport L320 parts catalogue, the 2.7 TDV6 (276DT) runs a Bosch high-pressure pump that is mechanically distinct from the 3.0 TDV6 (306DT) used on the Discovery 4 and Range Rover L405 parts. Discovery 4 restricted-performance events are commonly traced to rail-pressure deviation rather than ignition or boost faults. Freelander 2 2.2 TD4 owners learn the post-filter-change priming requirement the hard way the first time they replace a fuel filter without a manual bulb.

The component categories on this page reflect those failure patterns. Filtration changes are usually paired with pump or injector replacement, since contaminated filters are the leading wear driver on common-rail systems. Injector work pairs with new copper washers and seals every time, because reused seals are the most common cause of post-repair leakage. Regulator work on the Td5 is a fuel-system job, not a sump job, even though the visible symptom is a diesel puddle at the rear of the engine block.

Key Fuel System Components

Before you order

Pre-purchase checks that prevent the most common ordering mistakes on Land Rover fuel system work.

• Confirm the engine code, not just the model. Range Rover Sport L320 production runs both the 2.7 TDV6 (276DT) and the 3.0 TDV6 (306DT), and the high-pressure pumps and injectors are not interchangeable. Discovery 3 is 276DT only; Discovery 4 is 306DT and later 3.0 SDV6.
• For Discovery 3 and Discovery 4 injectors, capture the classification code. Each injector carries a code on the top that must be coded into the ECU for the cylinder it serves. Single-injector replacement without coding causes adaptation drift and re-triggers fault codes.
• Always order copper washers and seals with injectors. Reused seals are the leading cause of post-replacement leak-off. On the Td5, the copper sump-side washer is the part most commonly missed from the order.
• Plan filter priming on Freelander 2 2.2 TD4 before you start the job. The 2.2 TD4 has no internal primer. A manual priming bulb is required to pull fuel through before cranking; a dry start damages the high-pressure pump.
• Treat the Td5 fuel pressure regulator block as a fuel-system part, not a sump fault. A diesel puddle at the rear of the Td5 cylinder head is the regulator block leaking internally, not a sump or rocker-cover leak. Order the regulator assembly and the rear-of-head seals together.
• Buy filters and pumps as a pair where the labour overlaps. On any common-rail diesel, a high-pressure pump replacement should be done with a new fuel filter to protect the new pump from any debris carried over from the old filter housing.

Replace together where labour overlaps

Fuel system repairs are most economical when paired by labour group, not by single-component swap. Common pairings observed across the Discovery 3 and Discovery 4 parts catalogues, Defender Td5 service work, and Freelander 2 maintenance:

• High-pressure pump replacement with a new fuel filter, because filter contamination is the leading wear driver on CP4-family pumps.
• Injector replacement with copper washers, seals and where applicable a coding session, because reused seals leak and uncoded injectors drift.
• Td5 regulator block replacement with the rear-of-head seal kit, because the same access labour covers both.
• Tank-side lift pump replacement with the sender unit and tank-side filter, because the tank is open and the sender ages on the same calendar as the pump.

Technical guides

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Frequently asked questions

Updated: 17 May 2026