QXWC Injector Problems – Symptoms, Causes & Fixes

Engine: QXWC 4 compatible injectors From £90

Common Injector Failures on the QXWC

The QXWC 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, Delphi, Siemens VDO / Continental.

Vehicles fitted with the QXWC include models from Citroen, Ford, Peugeot, Volvo. 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 QXWC 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

QXWC Injector Replacement Cost

Parts (per injector)

£90–£161

Labour

£150–£400

Total (per injector)

£240–£561

Full replacement cost guide

Compatible Injectors for the QXWC4 found

5WS40156-ZSiemens VDO / Continental

Most Common Injector Part Numbers for QXWC Engine

5WS40156-ZSiemens VDO / Continental

£90.001 vehicle

4902297464Delphi

£120.001 vehicle

Related Cross Reference Numbers for QXWC

5WS40156 5WS40156-Z 5WS40156Z A2C59511601

Vehicles Using the QXWC Engine

Related Engine Codes

CD390 CVRA CYFA D4204T D4204T2 DRRA

Frequently Asked Questions

What are common injector problems on the QXWC engine?

The QXWC 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 QXWC engine?

A remanufactured injector for the QXWC engine typically costs £90–£161 per injector. Labour adds £150–£400 depending on accessibility. We found 4 compatible injectors for this engine.

Which vehicles use the QXWC engine?

The QXWC engine is found in vehicles from Citroen, Ford, Peugeot, Volvo. Common models include Citroen C4, Ford GALAXY, Ford Mondeo, Ford S-Max, Peugeot 307.

How do I test the injectors on a QXWC 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 QXWC Injector?

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

View All Injectors Replacement Cost Guide Call 020 3355 6581