A2C59513556 / 9802448680 / 9674973080 Diesel Injector Guide: Compatibility, Problems & Replacement

If you've traced a misfire, a rough idle or a hard start on a 1.6-litre diesel back to a single injector, there's a fair chance the part you're now looking for is the Siemens VDO A2C59513556 — one of the most widely fitted common-rail injectors on the PSA and Ford 1.6 diesel family. It also turns up under the Peugeot/Citroen OE numbers 9802448680 and 9674973080, which is where a lot of the confusion starts. This guide explains exactly what the injector is, which engines it suits, how it fails, and how to choose the right replacement without ordering the wrong unit. It's written for garages and owners who want to get the diagnosis and the part right first time.

What is the A2C59513556 injector?

The A2C59513556 is a piezo common-rail diesel injector manufactured by Siemens VDO (the diesel injection business is now part of Continental, which is why you'll see it branded Siemens VDO / Continental). It's the injector specified on a large slice of the PSA-developed 1.6-litre HDi diesel — the engine you'll also find in countless Ford 1.6 TDCi models, because the two manufacturers co-developed the family.

On a common-rail system the high-pressure pump charges a shared rail and holds it at very high pressure, and the ECU fires each injector independently — often several times per combustion cycle. The A2C59513556 uses a piezo actuator rather than a solenoid, which gives very fast, precise injection events. If you want the underlying theory of how these units work and fail, our companion common-rail diesel injector guide covers the mechanism in plain workshop terms. You can also see the live specification, price and gallery on the A2C59513556 product page.

OE numbers explained

This is the part that trips people up, so it's worth being clear. The same physical injector is sold and referenced under several numbers depending on who catalogued it. A2C59513556 is the Siemens VDO / Continental reference. 9802448680 and 9674973080 are PSA (Peugeot/Citroen) original-equipment numbers for the very same unit. People often think they're chasing three different parts when they're actually looking at one.

The practical takeaway: don't worry about which of the three numbers your paperwork shows. What matters is matching the injector to the correct engine code on your vehicle, because the 1.6 diesel was built in several power outputs and not every variant uses this exact unit. More on that below.

Compatible engines

According to the engine codes recorded against this injector in our catalogue, the A2C59513556 covers the PSA and Ford/Mazda 1.6-litre diesel family. The verified codes are:

• PSA (Peugeot / Citroen): DV6C, 9HR and 9HD — the 1.6 HDi / e-HDi versions of the DV6 engine.
• Ford / Mazda / Volvo: the Y6Y1, Y650, Y655 and TZGA / TZGB / T1GA / T1WA / T1WB / T1BA codes used on the equivalent 1.6 TDCi / D versions of the same co-developed engine.

Because these codes span the later, higher-specification 1.6 diesels, it's important not to assume fitment from engine size alone — the earlier and lower-output 1.6 HDi units (for example the 90bhp variants) often use a Bosch injector instead, which is why those appear as separate parts in the related products below. The safe way to confirm your exact fitment is to enter your registration in the injector finder, which matches the correct part to your specific engine and chassis. You can also browse the wider Siemens VDO injector range or the full diesel injector catalogue.

It's worth understanding why one engine family ends up with more than one injector. PSA and Ford co-developed this 1.6 diesel and produced it in several states of tune over a long production run, and the injection hardware was specified to suit each output and emissions standard. That's how you end up with Siemens VDO units on some variants and Bosch units on others, all under the same broad "1.6 HDi / TDCi" umbrella. For the buyer this means the engine code — not the badge on the bonnet or the litre figure — is the single piece of information that pins down the right injector. If your paperwork is unclear, the number etched on the injector itself, or a registration lookup, settles it.

Common failure symptoms

A failing A2C59513556 tends to announce itself the same way most worn common-rail injectors do, though the piezo design means problems can appear fairly suddenly. The symptoms we see most often are:

• Rough idle or a stumbling, uneven tickover, sometimes worse from cold.
• Hard starting — extended cranking before the engine catches, or a no-start in extreme cases.
• Loss of power or a flat spot under acceleration, often with the engine going into limp mode.
• Excessive smoke — black under load (over-fuelling) or white/grey on a cold start.
• A diesel "knock" or rattle from one cylinder as injection timing drifts.
• Increased fuel consumption and, in some cases, an engine management light.

Because every injector draws from the same rail, a single failing unit can present as a vague, whole-engine complaint rather than a tidy one-cylinder misfire. Always confirm the fault with live data and a leak-off (back-leakage) test before condemning a unit — the method is the same across all common-rail injectors and is described in our common-rail guide.

Common causes

The overwhelming cause of failure on these injectors is not a manufacturing flaw — it's fuel contamination and wear. At common-rail pressures, water and dirt are abrasive and quickly score the fine metering surfaces inside the injector. Piezo units like the A2C59513556 are particularly unforgiving of poor-quality or contaminated fuel, so the usual culprits are:

• Water or dirt in the fuel, often traced back to a neglected fuel filter or a contaminated tank.
• Long service intervals on the fuel filter, letting abrasive particles through to the injectors.
• High mileage wear of the nozzle and internal sealing surfaces, increasing back-leakage.
• Repeated short journeys and poor combustion conditions that accelerate deposits.

The important point for a lasting repair is to fix the cause as well as the symptom. Fitting a fresh injector without renewing the filter and checking for water ingress simply sets the new unit up to fail the same way.

It also pays to think about the whole fuel system, not just the injector in isolation. On these 1.6 diesels a good preventative routine is straightforward: stick to the manufacturer's fuel-filter interval (and shorten it if the vehicle does a lot of short runs or uses fuel from less reliable sources), drain any water trap promptly, and avoid running the tank persistently low, which stirs up sediment. None of that guarantees an injector will never wear out, but it removes the abrasive contamination that does the most damage and gives a new or remanufactured unit the best chance of a long, trouble-free life.

Repair vs replacement

Once you've confirmed a genuine injector fault, the decision is whether to recondition your existing units or fit replacements. Reconditioning your own injectors can work if they aren't too worn, but it means downtime while they're away being rebuilt and tested. For most garages and owners, fitting a ready-to-go remanufactured unit is faster and more predictable, because it arrives calibrated, tested and warranted.

It's also worth being realistic about doing one injector versus the set. If one unit has failed through general wear or contamination at high mileage, the others are usually not far behind, so many workshops replace as a set to avoid a repeat visit. That's a judgement call based on mileage, history and the leak-off figures across all cylinders.

Remanufactured vs new

A brand-new Siemens VDO injector is the most expensive route. A genuinely remanufactured A2C59513556 is the sensible-value alternative: it's stripped, ultrasonically cleaned, inspected, rebuilt with new wear parts as required, then calibrated on a common-rail test bench to the manufacturer's specification and supplied with a fresh test sheet. That last step is what separates a true reman unit from a "cleaned and re-boxed" used injector.

Every remanufactured injector we supply is bench-tested and backed by a 12-month warranty, so the value case is strong — a fraction of the cost of new, calibrated to spec, and covered. For a fuller breakdown of how to judge reman quality, core charges and what to check before ordering, see our complete remanufactured injector buyer's guide. The current live price for this part is shown on the product card below and on the product page.

On availability, the A2C59513556 is a mainstream part on a very common engine, so a remanufactured unit is normally ready to dispatch rather than being a special order — which is another reason a ready-to-fit reman injector usually beats sending your own units away to be rebuilt. Whichever route you choose, two things keep the repair (and the warranty) sound: renew the copper washers and seals on fitment, and have the new injector's calibration code programmed to the ECU so the engine balances fuelling across all four cylinders. Skipping the coding step is one of the most common reasons a correctly supplied injector still runs poorly afterwards.

How to identify the correct injector

Getting the right part first time comes down to two checks. First, read the number etched or laser-marked on the injector body: this unit carries the Siemens VDO branding and the A2C59513556 reference, and your vehicle paperwork may instead quote the PSA numbers 9802448680 or 9674973080 — all three point to the same injector. Second, and most important, confirm your engine code matches one of the verified codes above, because the 1.6 diesel family used more than one injector across its power outputs.

If the injectors are still in the car and you can't easily read them, the quickest reliable route is to enter your registration in the injector finder — it returns the correct original-equipment part for your exact engine and chassis, so you don't have to guess from "it's a 1.6 diesel". Don't order on engine size alone: two cars with the same badge and capacity can run completely different injectors.

Frequently asked questions

Is A2C59513556 the same as 9802448680 and 9674973080?

Yes. A2C59513556 is the Siemens VDO / Continental reference, while 9802448680 and 9674973080 are PSA (Peugeot/Citroen) original-equipment numbers for the same injector. They're interchangeable when matched to the correct engine code.

What engines is the A2C59513556 injector fitted to?

It covers the PSA and Ford-developed 1.6-litre diesel family — the engine codes recorded against it include the PSA DV6C, 9HR and 9HD, plus the equivalent Ford/Mazda/Volvo codes (Y6Y1, Y650, Y655 and the TZ/T1 codes). Always confirm your specific engine code, as other 1.6 diesel variants use different injectors.

What are the symptoms of a failing A2C59513556 injector?

The most common signs are rough idle, hard starting, power loss or limp mode, excessive smoke, a cylinder knock and higher fuel consumption. Confirm the fault with live data and a leak-off test before replacing, as a single faulty injector can affect the whole engine.

Do A2C59513556 injectors need coding after fitting?

Yes. Like most modern common-rail injectors, each unit carries a calibration code that should be programmed to the ECU on fitment so the engine fuels each cylinder correctly. Any well-equipped garage can do this; renew the seals and washers at the same time.

Should I buy a remanufactured or a new A2C59513556?

For most repairs a properly remanufactured unit is the best value — it's calibrated to specification, bench-tested, carries a 12-month warranty and costs a fraction of new. Buying from a specialist that tests what it sells is what makes the repair reliable.

Summary

The Siemens VDO A2C59513556 — also known as PSA 9802448680 and 9674973080 — is the common-rail piezo injector for much of the PSA and Ford 1.6-litre diesel family. If you're chasing a misfire or rough running, confirm the fault with live data and a leak-off test, match the part to your exact engine code rather than just the engine size, fix the underlying fuel-quality cause, and fit a calibrated, warranted remanufactured unit. Ready to get the right injector for your vehicle? Search by registration or part number and we'll match the exact unit for your engine.