The cost of reconditioning injectors – what sort of outlay should you expect?

Reconditioning injectors can cost from around €12 for a basic clean up to as much as €590–705 for a set of modern Common Rail injectors, including removal, parts and coding. The biggest influence on the price comes from the type of injector, the extent of the damage, the type of engine and whether the problem ends with contamination or already involves mechanical wear. In practice a Common Rail diesel usually costs noticeably more than an MPI petrol engine, and the most expensive tend to be modern piezoelectric injectors.

How much does reconditioning injectors cost in a diesel and in a petrol engine – when does it end at €35, and when does the bill go beyond €705?

Reconditioning a single Common Rail diesel injector most often costs around €70–140 each, but the final bill very often turns out to be higher. The diagnosis alone can cost:

• around €10–28 net each on Common Rail,
• around €11–15 each with simpler MPI petrol injectors,
• around €16 each with petrol GDI/FSI.

And this is exactly where the biggest misunderstanding appears. Many drivers type "How much does reconditioning Common Rail injectors cost?" into Google, see a price such as "from €22" and assume that this is what the whole repair will cost. Meanwhile, such figures very often mean solely:

• basic diagnostics,
• a check on the test bench,
• or the labour alone, without parts.

A full reconditioning can cover:

• the nozzle tip,
• the control valve,
• the seals,
• the filters,
• the coding,
• the calibration,
• the final test.

And then the price rises very quickly. With petrol engines the situation usually looks gentler. With simpler MPI indirect injection, cleaning or a basic reconditioning can be relatively cheap. The problem gets more expensive with:

• direct GDI/FSI injection,
• modern TSI/TFSI engines,
• piezoelectric injection systems.

In such cars the reconditioning alone can start at around €30 each, before any additional components and labour are added on.

If a set of 4 diesel injectors is being reconditioned, the total cost very often falls within the range of:

• around €280–565 for the reconditioning alone,
• plus any:
• removal,
• refitting,
• coding,
• new washers,
• diagnostics of the fuel system.

And that is exactly why the final bill can go beyond even €705, particularly in newer premium diesels.

What exactly does reconditioning injectors cover – and what does the workshop add further hundreds of euros for?

This is a very important question, because the term "reconditioning" alone can mean a completely different scope of work. In one workshop it will be:

• a quick clean,
• a basic test,
• replacing the seals,

and in another a full procedure covering stripping down, calibration and a final test on the test bench.

That is why two workshops can quote completely different prices for "the same service". A fuller reconditioning of a Common Rail injector may cover:

• removal and stripping down,
• ultrasonic cleaning,
• replacing the nozzle tip,
• replacing the control valve,
• new seals and filters,
• adjusting the parameters,
• assigning a new IMA/ISA/C2I code,
• a final test with a report.

And it is the parts that most often make the biggest difference to the price. For example, some workshops quote:

• labour for reconditioning electromagnetic Common Rail injectors from around €15–35,
• but the final price already depends on:
• the type of injector,
• the wear,
• the availability of parts,
• the extent of the damage.

Access to the injector itself also matters a great deal. In theory, replacing one diesel injector costs on average around €59–66 each, but practice can look considerably worse.

If the injector:

• has seized in the cylinder head,
• requires the seat to be reamed,
• is at risk of snapping off,
• or additional ancillaries have to be removed,

the labour rises very quickly.

That is why, when it comes to the question of what the cost of repairing injectors is, the honest answer is: it depends not only on the injector itself, but also on the scope of work around it.

Common Rail diesel, piezo or GDI petrol – which injectors are the most expensive to repair?

The cheapest to look after are usually classic MPI petrol injectors, that is, indirect fuel injection. Diagnosing and cleaning such systems often falls within the range of:

• around €11–15 each,
• and the reconditioning itself tends to be relatively simple.

It gets considerably more expensive with:

• petrol GDI/FSI,
• modern TSI/TFSI,
• Common Rail diesels,
• piezoelectric systems.

And it is precisely piezo injectors that are very often the biggest cost problem.

Why? Because they can be:

• harder to diagnose,
• more complex in design,
• more expensive to calibrate,
• less economical to repair,
• and some models have limited availability of replacement parts.

Some workshops even quote higher prices for diagnosing piezo injectors than for classic electromagnetic Common Rail units.

The manufacturer also matters a great deal:

• Bosch,
• Delphi,
• Denso,
• Siemens/Continental,

– each uses different procedures, parts and coding methods.

That is why two cars with a similar power output can have completely different reconditioning costs. Good examples are popular models:

• Skoda Octavia 2.0 TDI,
• Fords with TDCi and Delphi,
• BMWs with piezo,
• Audi TDI,
• Hyundai/Kia CRDi.

Is reconditioning injectors always worth it – and when is it better to buy new or factory-reconditioned units?

Not every reconditioning ends in success, and not every injector is even suitable for repair. This is very important, because many drivers automatically assume that reconditioning will always be the best and cheapest solution. In practice everything depends on the type of damage.

If the problem mainly concerns contamination, back-leakage or wear of service components, reconditioning often makes economic sense. Particularly in popular Common Rail diesels, the cost of repairing a single injector at a level of around €70–140 can be far more favourable than buying a new component.

The situation changes, however, when what is damaged is:

• the injector body,
• the coil,
• the piezoelectric stack,
• or mechanical damage appears that makes correct calibration impossible.

In such cases some workshops tell the customer straight away that reconditioning may be uneconomical or impossible to carry out with a warranty.

And that is exactly why the standard of the service itself is so important. Good reconditioning does not end at "flushing the injector through". The workshop should carry out:

• tests on the test bench,
• parameter measurements,
• a final calibration,
• and prepare a test report after the repair.

Without that, the driver often has no real idea of the condition in which the injector comes back.

It is also worth paying attention to factory-reconditioned parts, for example the Bosch eXchange programme. The manufacturer describes them as a cheaper alternative to new components, but with certain quality standards and parameter checks maintained. For many drivers this is a safer option than very cheap reconditioning "without paperwork" and without final tests.

How much does the labour cost when replacing injectors – and why can a seized injector double the bill?

The reconditioning itself is often only part of the final cost. A great many drivers only find out when collecting the car that they additionally have to pay for:

• removal,
• refitting,
• coding,
• reaming the seats,
• new washers,
• or extracting seized injectors.

And this is exactly where the bill can shoot up.

According to data from CenaUslug, the average cost of replacing one diesel injector is around €59–66 each, and with petrol around €33–35 each. The problem, however, is that these are values for a standard procedure, without major complications.

The most expensive cases start when the injector:

• has seized in the cylinder head,
• requires a special puller,
• is at risk of snapping off,
• or the seat has to be reamed after removal.

In some Common Rail diesels, particularly with high mileages and long service-free running, getting one seized injector out can take several hours. In extreme situations even a partial removal of the engine ancillaries or taking the cylinder head off may be necessary.

On top of that there is the coding. In modern Common Rail systems, after reconditioning or replacement you often have to enter new IMA, C2I or QR correction codes into the ECU. Without this the engine may:

• run unevenly,
• start less well,
• use more fuel,
• or generate fuel quantity trim faults.

Can the cost of reconditioning injectors be reduced – without the risk of the problem coming back after a few weeks?

Yes, but one thing matters most: reacting earlier, before the problem starts destroying further components of the fuel system. In practice it very often turns out that for many months the driver ignored:

• uneven engine running,
• harder starting,
• smoking,
• higher fuel consumption,
• or injection quantity trims going out of range.

And then a problem with the injector itself starts affecting:

• the DPF,
• the turbocharger,
• the catalytic converter,
• and sometimes even the pistons and the engine oil.

The cheapest stage is usually the diagnosis. A back-leakage test, reading the trims or checking the injectors' operating parameters can cost a couple of dozen euros, and they make it possible to detect the problem far earlier than a full failure.

It is also worth remembering the basics of running a car. Common Rail injectors work under very high pressure and are exceptionally sensitive to:

• water in the fuel,
• metal filings,
• contamination,
• an old fuel filter,
• driving on reserve.

And that is exactly why regularly changing the fuel filter and filling up with good-quality fuel have a real influence on the durability of the whole system.

At the first signs of contamination, some drivers also use cleaning products, for example:

• TEC 2000 Diesel Injector Cleaner in a diesel,
• or TEC 2000 Fuel Injector Cleaner in a petrol engine.

Products of this kind can support preventive maintenance and help with contamination of the fuel system, but one thing has to be emphasised clearly: a product will not repair a damaged coil, a cracked body or a mechanically worn injector.

That is why the best way of limiting costs is usually not "the cheapest reconditioning", but quick diagnostics and not allowing a situation in which the failure of one injector starts damaging the entire fuel system.

FAQ

How much does reconditioning injectors cost?

Most often from around €70 to €140 for a single Common Rail injector, but the final cost depends on the type of injector, the extent of the damage and the price of the parts. With a set of 4 injectors the bill often exceeds €470.

What is the price of reconditioning diesel injectors?

In Common Rail diesels prices are usually higher than in petrol engines. The diagnosis alone can cost around €10–28 each, and a full reconditioning most often from €70 upwards per injector.

How much does reconditioning Common Rail injectors cost?

On average around €280–565 for a set of 4, without major complications related to removal. In modern piezoelectric systems the cost may be higher still.

How much does the labour cost when replacing injectors?

On average around €59–66 to replace one diesel injector and around €33–35 with petrol. With seized injectors the cost may be considerably higher.

Is reconditioning injectors always worth it?

Not always. If the body, the coil or the piezoelectric element is damaged, reconditioning may be uneconomical or impossible to carry out with a warranty.

How much does repairing a fuel injector cost?

With minor problems it sometimes ends with diagnostics and cleaning for a couple of dozen or a couple of hundred euros. With a more serious reconditioning or replacing a full set the cost may exceed €705.

How much does repairing an injection system fault in a petrol engine cost?

In simpler MPI systems the costs tend to be lower than in a diesel. Diagnostics and cleaning often start at around €11–16 each, but in modern GDI/TSI engines reconditioning prices can be considerably higher.

Can an injector cleaning product replace reconditioning?

No. Products can help with contamination and preventive maintenance of the fuel system, but they will not repair a mechanically damaged injector.

Why are seized injectors so expensive to repair?

Because the problem often concerns not the injector itself, but getting it out. A seized component may require specialist tools, reaming of the seat or many hours of a mechanic's work.

Sources

• Bosch Automotive – Common Rail Injection System
• Delphi Technologies – Diesel Injector Diagnostics & Repair
• Denso Europe – Diesel Injection Systems
• Federal-Mogul / DRiV – Fuel Injector Technical Resources
• AutoCentrum – Objawy uszkodzonych wtryskiwaczy
• Motointegrator – Regeneracja wtryskiwaczy
• SAE International – Fuel Injector Deposits Research