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

Engine: CRLB 81 compatible injectors From £100

Common Injector Failures on the CRLB

The CRLB 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 81 tested replacement injectors for this engine from Bosch.

Vehicles fitted with the CRLB 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

Black Smoke
White Smoke
Rough Idle
Hard Starting
Engine Knock

Related Fault Codes

P0201P0202P0203P0204P0263P0266P0269P0087P0089P0300

How to Test CRLB 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

CRLB Injector Replacement Cost

Parts (per injector)

£100–£150

Labour

£150–£400

Total (per injector)

£250–£550

Full replacement cost guide

Compatible Injectors for the CRLB81 found

0987654567
0987654567Bosch
£99.880867673265
0867673265Bosch
£100.002780
2780Bosch
£100.00159
159Bosch
£150.00582
582Bosch
£150.00555
555Bosch
£150.00508
508Bosch
£150.00492
492Bosch
£150.004528472784
4528472784Bosch
£150.00498
498Bosch
£150.001025
1025Bosch
£150.00571
571Bosch
£150.00

Most Common Injector Part Numbers for CRLB Engine

334889346
334889346Bosch
£350.0018 vehicles
0867673265
0867673265Bosch
£100.0016 vehicles
043530632
043530632Bosch
£695.908 vehicles
4528472784
4528472784Bosch
£150.003 vehicles
9087437474
9087437474Bosch
£350.002 vehicles
0987654567
0987654567Bosch
£99.882 vehicles
1098
1098Bosch
£150.001 vehicle
542
542Bosch
£350.001 vehicle

Related Cross Reference Numbers for CRLB

038130073BJ038130079QX03G130073G03G130073GX0445110473044511503404451150510445115052

Vehicles Using the CRLB Engine

AUDI A6CRLB
Audi A4CRLB
Audi A8CRLB
AUDI A3CRLB
AUDI A4CRLB
AUDI A1CRLB

Related Engine Codes

1T1 1T2 2003 2004 8EC 8ED

Frequently Asked Questions

What are common injector problems on the CRLB engine?
The CRLB 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 CRLB engine?
A remanufactured injector for the CRLB engine typically costs £100–£150 per injector. Labour adds £150–£400 depending on accessibility. We found 81 compatible injectors for this engine.
Which vehicles use the CRLB engine?
The CRLB engine is found in vehicles from AUDI, Audi. Common models include AUDI A1, AUDI A3, AUDI A4, AUDI A6, Audi A4.
How do I test the injectors on a CRLB 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 CRLB Injector?

We stock 81 tested replacement injectors for the CRLB engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All InjectorsReplacement Cost Guide Call 020 3355 6581