NCV3 Injector Problems – Symptoms, Causes & Fixes

Engine: NCV3 1 compatible injectors From £150

Common Injector Failures on the NCV3

The NCV3 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 NCV3 include models from Mercedes. 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 NCV3 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

NCV3 Injector Replacement Cost

Parts (per injector)

£150–£150

Labour

£150–£400

Total (per injector)

£300–£550

Full replacement cost guide

Compatible Injectors for the NCV31 found

64324634Bosch

£149.90

Most Common Injector Part Numbers for NCV3 Engine

64324634Bosch

£149.9217 vehicles

Vehicles Using the NCV3 Engine

Mercedes SPRINTERNCV3

Related Engine Codes

OM607 OM608 OM612 OM626 OM628 OM629

Frequently Asked Questions

What are common injector problems on the NCV3 engine?

The NCV3 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 NCV3 engine?

A remanufactured injector for the NCV3 engine typically costs £150–£150 per injector. Labour adds £150–£400 depending on accessibility. We found 1 compatible injectors for this engine.

Which vehicles use the NCV3 engine?

The NCV3 engine is found in vehicles from Mercedes. Common models include Mercedes SPRINTER.

How do I test the injectors on a NCV3 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 NCV3 Injector?

We stock 1 tested replacement injectors for the NCV3 engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All Injectors Replacement Cost Guide Call 020 3355 6581