Engine injector problems

This section of the Remanufactured Injector website loads its pages in the browser.

Skip to main content

Ships Worldwide•FREE UK•£50 International

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

CUUC Injector Problems – Symptoms, Causes & Fixes

Engine: CUUC 1 compatible injectors From £120

Common Injector Failures on the CUUC

The CUUC 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 1 tested replacement injectors for this engine from Bosch.

Vehicles fitted with the CUUC include models from Audi, Seat, Skoda, Volkswagen. 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 CUUC 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

CUUC Injector Replacement Cost

Parts (per injector)

£120–£120

Labour

£150–£400

Total (per injector)

£270–£520

Full replacement cost guide

Compatible Injectors for the CUUC1 found

0445110468
0445110468Bosch
£120.00

Related Cross Reference Numbers for CUUC

044511046904L1302770986435258

Related Engine Codes

CRLB CRLC CRMB CSUA CSUB CSUE

Frequently Asked Questions

What are common injector problems on the CUUC engine?
The CUUC 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 CUUC engine?
A remanufactured injector for the CUUC engine typically costs £120–£120 per injector. Labour adds £150–£400 depending on accessibility. We found 1 compatible injectors for this engine.
Which vehicles use the CUUC engine?
The CUUC engine is found in vehicles from Audi, Seat, Skoda, Volkswagen. Common models include Audi A3, Audi A4, Audi A5, Audi A6, Audi Q2.
How do I test the injectors on a CUUC 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 CUUC Injector?

We stock 1 tested replacement injectors for the CUUC engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All InjectorsReplacement Cost Guide Call 020 3355 6581