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REMANUFACTURED INJECTORDiesel Fuel Injectors
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12-Month Warranty
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Z19DTJ Injector Problems – Symptoms, Causes & Fixes

Engine: Z19DTJ 3 compatible injectors From £100

Common Injector Failures on the Z19DTJ

The Z19DTJ 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 3 tested replacement injectors for this engine from Bosch.

Vehicles fitted with the Z19DTJ include models from Vauxhall. If you are experiencing any of the symptoms below, your injectors may need testing or replacement.

Symptoms of Injector Failure

Black Smoke
White Smoke
Rough Idle
Hard Starting
Engine Knock

Related Fault Codes

P0201P0202P0203P0204P0263P0266P0269P0087P0089P0300

How to Test Z19DTJ 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

Z19DTJ Injector Replacement Cost

Parts (per injector)

£100–£160

Labour

£150–£400

Total (per injector)

£250–£560

Full replacement cost guide

Compatible Injectors for the Z19DTJ3 found

76235475
76235475Bosch
£100.00345437865
345437865Bosch
£136.901018304451
1018304451Bosch
£159.90

Most Common Injector Part Numbers for Z19DTJ Engine

345437865
345437865Bosch
£136.9012 vehicles
76235475
76235475Bosch
£100.004 vehicles
1018304451
1018304451Bosch
£159.903 vehicles

Vehicles Using the Z19DTJ Engine

Vauxhall VIVAROZ19DTJ
Vauxhall COMBOZ19DTJ
Vauxhall AGILAZ19DTJ

Related Engine Codes

A13DTC A13DTE A13DTR A17DTJ A17DTR A17DTS

Frequently Asked Questions

What are common injector problems on the Z19DTJ engine?
The Z19DTJ 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 Z19DTJ engine?
A remanufactured injector for the Z19DTJ engine typically costs £100–£160 per injector. Labour adds £150–£400 depending on accessibility. We found 3 compatible injectors for this engine.
Which vehicles use the Z19DTJ engine?
The Z19DTJ engine is found in vehicles from Vauxhall. Common models include Vauxhall AGILA, Vauxhall COMBO, Vauxhall VIVARO.
How do I test the injectors on a Z19DTJ 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 Z19DTJ Injector?

We stock 3 tested replacement injectors for the Z19DTJ engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All InjectorsReplacement Cost Guide Call 020 3355 6581