Question 1

How much is an injector for a PEUGEOT 107?

Accepted Answer

An exchange injector for the PEUGEOT 107 starts at €155.00. A single reference, 5WS40149-Z, covers this model: the price shown is that one part, with no variant to compare.

Question 2

Which injector reference fits a PEUGEOT 107?

Accepted Answer

The reference is 5WS40149-Z. It is what settles the match on a PEUGEOT 107 — not the vehicle's trade name, nor its year.

Question 3

Why is only one injector reference offered for the 107?

Accepted Answer

Because the 107 engines listed here were built with the same injector. The choice is unique, which rules out any risk of mismatch.

Question 4

Where is the reference found on an injector removed from a PEUGEOT 107?

Accepted Answer

It is engraved on the injector body. The marking stays readable even on a part coated with soot. It is the only reading that confirms the match with the reference expected on a PEUGEOT 107.

Question 5

How do I find out which engine my 107 has?

Accepted Answer

The registration document states the version and the rated power of the vehicle; the engine code itself is stamped on the block. That engine-and-power pairing places the car within the 107 range, and leads to the right injector reference.

Question 6

Is the year of my 107 enough to choose the injector?

Accepted Answer

No. Two 107 of the same year can take different injectors depending on their engine. It is the engine-and-power pairing that determines the reference, and the code on the removed part that confirms it.

Question 7

What happens to the old injector from my PEUGEOT 107?

Accepted Answer

The part ordered is sold as an exchange unit: it has already been remanufactured, and the injector you remove from the 107 goes back into the reconditioning circuit. Return terms are stated at checkout.

Question 8

How does an exchange injector differ from a new part?

Accepted Answer

An exchange injector is an original part restored to working order: wear parts are replaced and the part is bench-tested. It carries the same reference as the injector removed from the 107 and fits in its place.

Question 9

How do I spot a worn injector on a PEUGEOT 107?

Accepted Answer

On a PEUGEOT 107, a clogged or worn injector shows up as misfires under acceleration, black smoke at the exhaust, higher fuel consumption and an unstable idle. These signs overlap with other fuel system faults: diagnosis is a job for a qualified technician.

Question 10

Why does my 107 go into limp mode?

Accepted Answer

The ECU of the 107 limits the engine when injection pressure no longer matches what the engine expects. An injector that no longer meters correctly, or whose leak-off return is excessive, is one possible cause.

Question 11

Does a knock at idle always come from the injector?

Accepted Answer

No. The knock can come from the injector itself, but equally from the common rail, a leak-off return line or the glow plugs. Noise alone is not enough to condemn the part.

Question 12

Should every injector on a 107 be replaced at the same time?

Accepted Answer

That is the rule on a common rail engine: the injectors of one engine have run the same number of cycles, and a worn part wears the others. They are replaced as a full set as soon as one fails, with the reference matching the engine fitted to the 107.

Question 13

How do I confirm the fault before ordering an injector for the 107?

Accepted Answer

By a fault code read and a leak-off flow test, carried out by a qualified technician, before any order for a PEUGEOT 107. That check names the part at fault and separates it from a pressure fault elsewhere in the fuel system — faults with similar symptoms but different remedies.

Question 14

Can I order an injector for the 107 without knowing the exact reference?

Accepted Answer

This page lists a single reference for the 107, 5WS40149-Z: the code on the removed part then serves to confirm, not to choose. Where the engine is in doubt, the check belongs to a qualified technician before ordering.

Question 15

Does an injector ordered for a PEUGEOT 107 fit straight on?

Accepted Answer

Yes, provided the reference is the original fitment for the engine in the 107, and the part comes with the matching seal. Fitting and coding to the ECU are a job for a qualified automotive technician.

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Injector SIEMENS-VDO 5WS40149-Z

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