Z13DTH Injector Problems – Symptoms, Causes & Fixes

Engine: Z13DTH 2 compatible injectors From £90

Common Injector Failures on the Z13DTH

The Z13DTH 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 2 tested replacement injectors for this engine from Bosch.

Vehicles fitted with the Z13DTH include models from BMW, Citroen, Ford, 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 Z13DTH 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

Z13DTH Injector Replacement Cost

Parts (per injector)

£90–£90

Labour

£150–£400

Total (per injector)

£240–£490

Full replacement cost guide

Compatible Injectors for the Z13DTH2 found

Most Common Injector Part Numbers for Z13DTH Engine

Related Cross Reference Numbers for Z13DTH

0445110037 0445110041 0445110049 0445110749 0445110954 0445110955 0986435095 2191087

Vehicles Using the Z13DTH Engine

BMW 3 Series (E46)Z13DTH

BMW 5 Series (E39)Z13DTH

Land Rover FreelanderZ13DTH

Vauxhall OmegaZ13DTH

Ford Transit ConnectZ13DTH

Ford Transit CourierZ13DTH

Related Engine Codes

A13DTC A13DTE DW10FC DW10FD TD4 YHR

Frequently Asked Questions

What are common injector problems on the Z13DTH engine?

The Z13DTH 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 Z13DTH engine?

A remanufactured injector for the Z13DTH engine typically costs £90–£90 per injector. Labour adds £150–£400 depending on accessibility. We found 2 compatible injectors for this engine.

Which vehicles use the Z13DTH engine?

The Z13DTH engine is found in vehicles from BMW, Citroen, Ford, Land Rover. Common models include BMW 3 Series (E46), BMW 5 Series (E39), Citroen Berlingo, Citroen C3, Citroen C4.

How do I test the injectors on a Z13DTH 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

Need a Replacement Z13DTH Injector?

We stock 2 tested replacement injectors for the Z13DTH 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.