Skip to main content

Ships Worldwide•FREE UK•£50 International

Trade customer? Get Trade Pricing
REMANUFACTURED INJECTORDiesel Fuel Injectors
OEM Tested
12-Month Warranty
Free UK Delivery
Same-Day Dispatch

Z19DTL Injector Problems – Symptoms, Causes & Fixes

Engine: Z19DTL 4 compatible injectors From £70

Common Injector Failures on the Z19DTL

The Z19DTL 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 4 tested replacement injectors for this engine from Bosch.

Vehicles fitted with the Z19DTL include models from Alfa Romeo, Fiat, Saab, Suzuki. 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 Z19DTL 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

Z19DTL Injector Replacement Cost

Parts (per injector)

£70–£160

Labour

£150–£400

Total (per injector)

£220–£560

Full replacement cost guide

Compatible Injectors for the Z19DTL4 found

0445110276Bosch
£70.0076235475
76235475Bosch
£100.00345437865
345437865Bosch
£136.901018304451
1018304451Bosch
£159.90

Most Common Injector Part Numbers for Z19DTL Engine

345437865
345437865Bosch
£136.9012 vehicles
76235475
76235475Bosch
£100.004 vehicles
1018304451
1018304451Bosch
£159.903 vehicles
0445110276Bosch
£70.001 vehicle

Related Cross Reference Numbers for Z19DTL

044511027609864351485520025955221017

Vehicles Using the Z19DTL Engine

Alfa Romeo 147Z19DTL
Alfa Romeo 156Z19DTL
Alfa Romeo 159Z19DTL
Alfa Romeo GTZ19DTL
Fiat BravoZ19DTL
Fiat CromaZ19DTL

Related Engine Codes

186A7000 186A8000 186A9000 192A8000 192B4000 192B5000

Frequently Asked Questions

What are common injector problems on the Z19DTL engine?
The Z19DTL 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 Z19DTL engine?
A remanufactured injector for the Z19DTL engine typically costs £70–£160 per injector. Labour adds £150–£400 depending on accessibility. We found 4 compatible injectors for this engine.
Which vehicles use the Z19DTL engine?
The Z19DTL engine is found in vehicles from Alfa Romeo, Fiat, Saab, Suzuki. Common models include Alfa Romeo 147, Alfa Romeo 156, Alfa Romeo 159, Alfa Romeo GT, Fiat Bravo.
How do I test the injectors on a Z19DTL 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

Explore Related Content

Diagnostic Guides
Related Vehicles

Need a Replacement Z19DTL Injector?

We stock 4 tested replacement injectors for the Z19DTL engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All InjectorsReplacement Cost Guide Call 020 3355 6581