N57D30B Injector Problems – Symptoms, Causes & Fixes

Engine: N57D30B 1 compatible injectors From £260

Common Injector Failures on the N57D30B

The N57D30B 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 N57D30B include models from BMW. 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 N57D30B 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

N57D30B Injector Replacement Cost

Parts (per injector)

£260–£260

Labour

£150–£400

Total (per injector)

£410–£660

Full replacement cost guide

Compatible Injectors for the N57D30B1 found

13537823462Bosch

£260.00

Most Common Injector Part Numbers for N57D30B Engine

13537823462Bosch

£260.001 vehicle

Related Cross Reference Numbers for N57D30B

0445117017 0445117030 13537823461 13537823462

Vehicles Using the N57D30B Engine

Related Engine Codes

N57D30 N57D30A N57D30O1

Frequently Asked Questions

What are common injector problems on the N57D30B engine?

The N57D30B 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 N57D30B engine?

A remanufactured injector for the N57D30B engine typically costs £260–£260 per injector. Labour adds £150–£400 depending on accessibility. We found 1 compatible injectors for this engine.

Which vehicles use the N57D30B engine?

The N57D30B engine is found in vehicles from BMW. Common models include BMW 3 Series, BMW 4 Series, BMW 5 Series, BMW 6 Series, BMW 7 Series.

How do I test the injectors on a N57D30B 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 N57D30B Injector?

We stock 1 tested replacement injectors for the N57D30B engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All Injectors Replacement Cost Guide Call 020 3355 6581