UHZ Injector Problems – Symptoms, Causes & Fixes

Engine: UHZ 1 compatible injectors From £100

Common Injector Failures on the UHZ

The UHZ engine uses high-pressure common rail diesel injection. Over time, injector nozzles wear, seals degrade, and internal components lose calibration. This leads to a range of drivability symptoms that worsen if left unaddressed. We stock 1 tested replacement injectors for this engine from Siemens VDO / Continental.

Vehicles fitted with the UHZ include models from Jaguar, Land Rover. If you are experiencing any of the symptoms below, your injectors may need testing or replacement.

Symptoms of Injector Failure

Related Fault Codes

P0201 P0202 P0203 P0204 P0263 P0266 P0269 P0087 P0089 P0300

How to Test UHZ Injectors

Leak-off test: Connect clear hoses to the injector return lines and compare fuel volumes at idle. The injector returning the most fuel is likely worn.

Correction values: Use a scan tool to read injector correction (IMA) values. Readings beyond ±3 mg/stroke indicate wear.

Resistance check: Measure resistance across the injector connector pins with a multimeter. Compare to manufacturer specs.

Complete Testing Guide Leak-Off Test Guide

UHZ Injector Replacement Cost

Parts (per injector)

£100–£100

Labour

£150–£400

Total (per injector)

£250–£500

Full replacement cost guide

Compatible Injectors for the UHZ1 found

A2C59511316Siemens VDO / Continental

£100.00

Most Common Injector Part Numbers for UHZ Engine

A2C59511316Siemens VDO / Continental

£100.001 vehicle

Related Cross Reference Numbers for UHZ

1980H1 562001310 A2C59511316 AAA9858580010

Vehicles Using the UHZ Engine

Jaguar XFUHZ

Jaguar S-TypeUHZ

Land Rover Discovery 3UHZ

Land Rover Range Rover SportUHZ

Related Engine Codes

AJTDV6 DT17ED4

Frequently Asked Questions

What are common injector problems on the UHZ engine?

The UHZ engine commonly suffers from injector seal failure, nozzle wear causing poor spray patterns, and back-leak issues. Symptoms include rough idle, black or white exhaust smoke, hard starting, and increased fuel consumption. These issues typically appear after 100,000–150,000 miles.

How much does it cost to replace injectors on a UHZ engine?

A remanufactured injector for the UHZ engine typically costs £100–£100 per injector. Labour adds £150–£400 depending on accessibility. We found 1 compatible injectors for this engine.

Which vehicles use the UHZ engine?

The UHZ engine is found in vehicles from Jaguar, Land Rover. Common models include Jaguar S-Type, Jaguar XF, Land Rover Discovery 3, Land Rover Range Rover Sport.

How do I test the injectors on a UHZ engine?

Perform a leak-off test by connecting clear hoses to each injector return line and comparing fuel volumes at idle. You can also check injector correction values with a diagnostic scan tool or measure electrical resistance with a multimeter.

Injector Compatibility Checker

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Need a Replacement UHZ Injector?

We stock 1 tested replacement injectors for the UHZ engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All Injectors Replacement Cost Guide Call 020 3355 6581

Diesel Injector Knowledge Centre

Remanufactured, Reconditioned or Refurbished Diesel Injectors — What We Supply

Whether you searched for remanufactured, reconditioned or refurbished diesel injectors, the product here is the same: a professionally remanufactured injector, not a cleaned-up used part. Each unit is dismantled, inspected against the manufacturer's test plan, worn components such as nozzles and control valves are replaced where the bench results call for it, then it is calibrated, tested and supplied ready to fit with its coding data. We remanufacture in-house in the UK and deliver nationwide.

Is a reconditioned injector the same as a remanufactured one?

In UK trade language the terms are used interchangeably. What matters is the process: our injectors are fully remanufactured — dismantled, worn parts replaced where required, recalibrated on the test bench and covered by a 12-month warranty — rather than simply cleaned and resold.