9802448680 — Frequently Asked Questions
Verified answers about the Siemens VDO 9802448680 (5WS40677) 1.6 HDi / TDCi Common Rail Piezo Injector.
What injector is part number 9802448680?
9802448680 is the PSA (Peugeot/Citroen) OE reference for a Siemens VDO / Continental piezoelectric common-rail diesel injector used on the 1.6 HDi / 1.6 TDCi (DV6) engine. The equivalent Siemens number is 5WS40677 and the Continental number is A2C59513556.
Is 9802448680 a Bosch injector?
No. Despite the 1.6 HDi engine using Bosch injectors in some later versions, 9802448680 is a Siemens VDO / Continental piezo injector. Bosch and Siemens injectors for this engine are not interchangeable.
What is the Siemens part number for 9802448680?
The Siemens VDO part number is 5WS40677, and the Continental supersession number is A2C59513556.
What other OE numbers cross to 9802448680?
Common PSA OE cross references include 9674973080 and 9683957280, alongside the Siemens 5WS40677 and Continental A2C59513556 numbers.
Which engine does 9802448680 fit?
It fits the PSA 1.6 HDi 16v DV6TED4 (and related DV6 family) engine, also sold as 1.6 TDCi by Ford and 1.6 D by Volvo.
Is this a piezo or solenoid injector?
It is a piezoelectric injector. Siemens VDO / Continental common-rail injectors for the 1.6 HDi use a piezo actuator rather than a solenoid.
Which vehicles use the 9802448680 injector?
It is fitted to many 1.6 HDi/TDCi vehicles including Citroen C3, C4, C5, Berlingo, Peugeot 207, 307, 308, 407, Partner, Ford Focus, C-Max, Fiesta, Fusion, Volvo S40, V50, C30 and Mazda 3.
What are the symptoms of a failing 9802448680 injector?
Hard cold starting, rough idle and misfire, loss of power or limp mode, black/white smoke, increased fuel consumption, diesel knock and injector-related fault codes.
Why does my 1.6 HDi struggle to start when cold?
Worn injectors with high back-leakage bleed off rail pressure during cranking, so the engine cannot build the pressure it needs to fire. A back-leakage test confirms this.
Can a single injector cause a misfire on one cylinder?
Yes, but on the DV6 a single-cylinder misfire is also commonly caused by the injector connector or wiring loom. Always swap-test and check the connector before replacing the injector.
What is 'black death' on a 1.6 HDi?
It is the hard black carbon/tar build-up around the injector base caused by combustion gases blowing past a failed copper sealing washer. It can seize the injector in the head and damage the seat.
Do I need to code the injector after fitting?
Yes. These injectors carry calibration/classification codes that must be programmed into the ECU (cylinder coding) after replacement, or the engine will run rough.
Can I test 9802448680 on a Bosch bench?
No. It is a Siemens VDO / Continental piezo injector and needs a bench that supports Siemens/VDO/Continental injectors for correct testing and coding.
Should I replace one injector or all four?
Diagnose each injector with live correction values and a bench test. If others are within spec you can replace individually, but on high-mileage engines failures often cluster, so check all four.
What causes excessive back-leakage in this injector?
Wear of internal sealing surfaces and the control valve over time, which lets fuel leak back to the return circuit instead of being injected.
Why is my DV6 blowing black smoke?
Black smoke usually means poor atomisation from a coked or stuck nozzle causing incomplete combustion. A bench spray-pattern test will confirm a faulty injector.
Can a faulty injector damage the turbo on a 1.6 HDi?
Indirectly, yes. Injector seal blow-by and poor combustion contribute to soot and oil contamination that, with the engine's known oil-feed issues, can shorten turbo life.
How do I identify the weak cylinder before removing injectors?
Read the live injector correction / IMA values with a diagnostic tool. The cylinder with the largest out-of-range correction is usually the faulty one.
Why is the injector seized in the head?
Carbon build-up between the injector body and the cylinder head bore over years of heat cycling locks it in place. Use a dedicated puller and never lever against the head.
What tools do I need to change this injector?
An injector puller/slide hammer, a torque wrench, new copper sealing washers, and a diagnostic tool capable of reading and writing injector codes.
Is 9802448680 the same as the Bosch 0445110340?
No. 0445110340 is a Bosch injector used on later Euro 5 DV6 variants. It fits the same engine family but is a different injector and is not interchangeable with the Siemens 9802448680.
Does a reconditioned 9802448680 perform like new?
A properly remanufactured injector is stripped, worn parts replaced, and bench-tested and recalibrated to the manufacturer's plan, so it should meet original delivery and back-leakage specs.
What fault codes are linked to this injector?
Cylinder-specific injector codes and rail-pressure regulation P-codes are common; exact codes depend on the vehicle's ECU and should be read with a diagnostic tool.
Why replace the copper washer every time?
The copper sealing washer is a one-use crush seal. Re-using it risks combustion blow-by and the 'black death' carbon build-up that damages the injector and head.
How can I make my replacement injectors last longer?
Use good-quality diesel, change the fuel filter on schedule, fix any water-in-fuel issues quickly, and ensure injectors are correctly torqued and coded at fitting.