CFGB Injector Problems – Symptoms, Causes & Fixes

Engine: CFGB 38 compatible injectors From £190

Common Injector Failures on the CFGB

The CFGB 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 38 tested replacement injectors for this engine from Bosch.

Vehicles fitted with the CFGB include models from AUDI, Audi. 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 CFGB 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

CFGB Injector Replacement Cost

Parts (per injector)

£190–£190

Labour

£150–£400

Total (per injector)

£340–£590

Full replacement cost guide

Compatible Injectors for the CFGB38 found

Most Common Injector Part Numbers for CFGB Engine

Related Cross Reference Numbers for CFGB

03L130277J 0445110368 0445110369 0986435167

Vehicles Using the CFGB Engine

AUDI TTCFGB

Audi TTCFGB

Frequently Asked Questions

What are common injector problems on the CFGB engine?

The CFGB 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 CFGB engine?

A remanufactured injector for the CFGB engine typically costs £190–£190 per injector. Labour adds £150–£400 depending on accessibility. We found 38 compatible injectors for this engine.

Which vehicles use the CFGB engine?

The CFGB engine is found in vehicles from AUDI, Audi. Common models include AUDI TT, Audi TT.

How do I test the injectors on a CFGB 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

Need a Replacement CFGB Injector?

We stock 38 tested replacement injectors for the CFGB engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All Injectors Replacement Cost Guide Call 020 3355 6581