K9K Injector Problems – Symptoms, Causes & Fixes

Engine: K9K 1 compatible injectors From £90

Common Injector Failures on the K9K

The K9K 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 Delphi.

Vehicles fitted with the K9K include models from Dacia, Mercedes-Benz, Nissan, Renault. 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 K9K 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

K9K Injector Replacement Cost

Parts (per injector)

£90–£90

Labour

£150–£400

Total (per injector)

£240–£490

Full replacement cost guide

Compatible Injectors for the K9K1 found

28232251Delphi

£90.00

Most Common Injector Part Numbers for K9K Engine

Related Cross Reference Numbers for K9K

28232251 28232251DNR HRD339 R03101D

Vehicles Using the K9K Engine

Frequently Asked Questions

What are common injector problems on the K9K engine?

The K9K 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 K9K engine?

A remanufactured injector for the K9K engine typically costs £90–£90 per injector. Labour adds £150–£400 depending on accessibility. We found 1 compatible injectors for this engine.

Which vehicles use the K9K engine?

The K9K engine is found in vehicles from Dacia, Mercedes-Benz, Nissan, Renault. Common models include Dacia Dokker, Dacia Duster, Dacia Lodgy, Dacia Logan, Mercedes-Benz Citan.

How do I test the injectors on a K9K 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 K9K Injector?

We stock 1 tested replacement injectors for the K9K engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All Injectors Replacement Cost Guide Call 020 3355 6581