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REMANUFACTURED INJECTORDiesel Fuel Injectors
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N47D20 Injector Problems – Symptoms, Causes & Fixes

Engine: N47D20 69 compatible injectors From £100

Common Injector Failures on the N47D20

The N47D20 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 69 tested replacement injectors for this engine from Bosch.

Vehicles fitted with the N47D20 include models from 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 N47D20 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

N47D20 Injector Replacement Cost

Parts (per injector)

£100–£100

Labour

£150–£400

Total (per injector)

£250–£500

Full replacement cost guide

Compatible Injectors for the N47D2069 found

3538
3538Bosch
£99.904343454321
4343454321Bosch
£99.9007986734255
07986734255Bosch
£99.9045584736378
45584736378Bosch
£99.903404
3404Bosch
£99.903584
3584Bosch
£99.903446
3446Bosch
£99.903407
3407Bosch
£99.903413
3413Bosch
£99.903488
3488Bosch
£99.903593
3593Bosch
£99.903505
3505Bosch
£99.90

Most Common Injector Part Numbers for N47D20 Engine

65345382536
65345382536Bosch
£280.85188 vehicles
07986734255
07986734255Bosch
£123.65118 vehicles
4343454321
4343454321Bosch
£130.8168 vehicles
44799778
44799778Bosch
£631.9057 vehicles
45584736378
45584736378Bosch
£99.9048 vehicles
8989872366
8989872366Bosch
£224.2843 vehicles
0445110616
0445110616Bosch
£193.0340 vehicles
6373635374
6373635374Bosch
£300.0038 vehicles

Related Cross Reference Numbers for N47D20

135377978771353779787813537809190135378234611353782346213538511630

Vehicles Using the N47D20 Engine

BMW 1 SERIESN47D20

Related Engine Codes

120 B37D15 B47C20 B47D20 B57D30 F40

Frequently Asked Questions

What are common injector problems on the N47D20 engine?
The N47D20 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 N47D20 engine?
A remanufactured injector for the N47D20 engine typically costs £100–£100 per injector. Labour adds £150–£400 depending on accessibility. We found 69 compatible injectors for this engine.
Which vehicles use the N47D20 engine?
The N47D20 engine is found in vehicles from BMW. Common models include BMW 1 SERIES.
How do I test the injectors on a N47D20 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 N47D20 Injector?

We stock 69 tested replacement injectors for the N47D20 engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All InjectorsReplacement Cost Guide Call 020 3355 6581