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REMANUFACTURED INJECTORDiesel Fuel Injectors
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12-Month Warranty
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N57S30 Injector Problems – Symptoms, Causes & Fixes

Engine: N57S30 4 compatible injectors From £100

Common Injector Failures on the N57S30

The N57S30 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.

Vehicles fitted with the N57S30 include models from BMW, Bmw. 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 N57S30 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

N57S30 Injector Replacement Cost

Parts (per injector)

£100–£200

Labour

£150–£400

Total (per injector)

£250–£600

Full replacement cost guide

Compatible Injectors for the N57S304 found

07986734255
07986734255Bosch
£99.901826348325
1826348325Bosch
£149.901343627616
1343627616Bosch
£159.903223
3223Bosch
£200.00

Most Common Injector Part Numbers for N57S30 Engine

07986734255
07986734255Bosch
£123.65118 vehicles
10092826252
10092826252Bosch
£227.9016 vehicles
11543216543
11543216543Bosch
£227.9012 vehicles
1826348325
1826348325Bosch
£149.904 vehicles
1343627616
1343627616Bosch
£159.903 vehicles
123486876
123486876Bosch
£244.902 vehicles
3199
3199Bosch
£200.001 vehicle
3211
3211Bosch
£200.001 vehicle

Related Cross Reference Numbers for N57S30

0445110819135375890481353782346113537823462135385792324311105607589048A2C9521220280

Vehicles Using the N57S30 Engine

BMW 1 SERIESN57S30
BMW 2 SERIESN57S30
Bmw X4N57S30

Related Engine Codes

120 216 B37D15 B47C20 B47D20 B57D30

Frequently Asked Questions

What are common injector problems on the N57S30 engine?
The N57S30 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 N57S30 engine?
A remanufactured injector for the N57S30 engine typically costs £100–£200 per injector. Labour adds £150–£400 depending on accessibility. We found 4 compatible injectors for this engine.
Which vehicles use the N57S30 engine?
The N57S30 engine is found in vehicles from BMW, Bmw. Common models include BMW 1 SERIES, BMW 2 SERIES, Bmw X4.
How do I test the injectors on a N57S30 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 N57S30 Injector?

We stock 4 tested replacement injectors for the N57S30 engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All InjectorsReplacement Cost Guide Call 020 3355 6581