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REMANUFACTURED INJECTORDiesel Fuel Injectors
OEM Tested
12-Month Warranty
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D4FD Injector Problems – Symptoms, Causes & Fixes

Engine: D4FD 2 compatible injectors From £100

Common Injector Failures on the D4FD

The D4FD 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 2 tested replacement injectors for this engine from Bosch.

Vehicles fitted with the D4FD include models from Hyundai. 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 D4FD 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

D4FD Injector Replacement Cost

Parts (per injector)

£100–£120

Labour

£150–£400

Total (per injector)

£250–£520

Full replacement cost guide

Compatible Injectors for the D4FD2 found

45565566
45565566Bosch
£100.0045423555
45423555Bosch
£120.00

Most Common Injector Part Numbers for D4FD Engine

43223444
43223444Bosch
£130.009 vehicles
56334566
56334566Bosch
£200.907 vehicles
67567567
67567567Bosch
£130.007 vehicles
45565566
45565566Bosch
£100.006 vehicles
45423555
45423555Bosch
£136.585 vehicles
32425665
32425665Bosch
£130.004 vehicles
23423433
23423433Bosch
£187.904 vehicles
54645777
54645777Bosch
£212.903 vehicles

Vehicles Using the D4FD Engine

Hyundai SANTA FED4FD
Hyundai I30D4FD

Related Engine Codes

D4EA D4EB D4FB D4FC D4FE D4FJ

Frequently Asked Questions

What are common injector problems on the D4FD engine?
The D4FD 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 D4FD engine?
A remanufactured injector for the D4FD engine typically costs £100–£120 per injector. Labour adds £150–£400 depending on accessibility. We found 2 compatible injectors for this engine.
Which vehicles use the D4FD engine?
The D4FD engine is found in vehicles from Hyundai. Common models include Hyundai I30, Hyundai SANTA FE.
How do I test the injectors on a D4FD 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 D4FD Injector?

We stock 2 tested replacement injectors for the D4FD engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All InjectorsReplacement Cost Guide Call 020 3355 6581