Mechanic under a lifted car using a cup gun with hose and probe to clean a diesel particulate filter

Diesel Particulate Filter Cleaning Instead of Replacing

No Expensive Removal of the Particulate Filter

Diesel Particulate Filter fully functional again within a very short time

More than 1 Million Times Tested Successfully

Patented DPF Cleaning Technology

An Overloaded Diesel Particulate Filter is Expensive

The diesel particle filter (DPF), also known as soot particle filter or simply particle filter, has the task of filtering health-endangering particles out of the exhaust system. In addition, the particle filter burns the soot that has collected on the filter pockets. This soot burn-off depends on the respective operating conditions, the different driving cycles and the individual engine exhaust concept of the automobile manufacturer. In order to comply with emissions standards, the diesel particulate filter (DPF) - as the name suggests - is used on vehicles with a diesel engine.

The Cost-Effective Alternative to Replacing the Particulate Filter

If the particle filter is clogged with particles, however, it can quickly become very expensive: Customers have to dig deep into their pockets to replace a diesel particulate filter.. A new diesel particulate filter (DPF) costs between EUR 1,000 and EUR 6,000. In addition, a longer workshop visit of the car and a chargeable replacement vehicle must be planned. In contrast, cleaning the particle filter with the TUNAP solution is an extremely cost-effective and inexpensive alternative.

The diesel particle filter (DPF), also known as soot particle filter or simply particle filter, has the task of filtering health-endangering particles out of the exhaust system. In addition, the particle filter burns the soot that has collected on the filter pockets. This soot burn-off depends on the respective operating conditions, the different driving cycles and the individual engine exhaust concept of the automobile manufacturer. In order to comply with emissions standards, the diesel particulate filter (DPF) - as the name suggests - is used on vehicles with a diesel engine.

Tested efficacy and material compatibility

Particulate filter cleaning instead of replacing it

  • The diesel particulate filter (DPF) is functional again within a short time
  • The cleaning of the diesel particulate filter (DPF) is carried out without complex removal
  • Our process has the technical approvals of the leading automobile manufacturers
  • Customers benefit from enormous cost savings compared to removing or replacing the filter
  • TUNAP cleaning has already been used successfully over 1 million times
  • Our procedure is suitable as a preventive measure to keep your customers permanently mobile
DPF problems

Symptoms and problems

An increasing loading of the particle filter without regular regeneration leads to a blockage of the component. The consequences are:

  • Loss of engine power
  • Increasing fuel consumption
  • Suboptimal throttle response
DPF cleaning aplication

Application and effect

Instead of replacing it, the particle filter is cleaned when it is installed:

  • The cleaning fluid dissolves the deposits on the component and
  • the neutralization solution ensures the complete removal of particles that are not transported away.
Result of DPF cleaning

Result of the DPF cleaning

The use of cleaning fluid and rinsing solution enables

  • a subsequent regeneration in which the soot deposits are burned to CO₂.
  • There is no additional burden on the environment.
  • The particle filter is fully functional again after cleaning.
Result of DPF cleaning

When should the particulate filter be cleaned?

A particle filter cleaning is necessary, if

  • the particle filter can no longer regenerate itself because it is fully loaded,
  • or the particulate filter is fully loaded, but the component itself is still intact.
  • Our recommendation is: The particulate filter system active ingredient should be used every third tank filling so that the burn-off temperature of the soot in the particulate filter is reduced.
TUNAP Cup Spray Gun with hose and probe together with two bottles of cleaning liquid

Diesel particle filter cleaning fluid and flushing solution.

Diesel particle filter cleaning fluid and flushing solution

microflex® 931 and 932

The cleaning set for diesel particulate filters (DPF) consists of a nonflammable and metalfree cleaning liquid and a rinsing solution. The non-flammable and metal-free cleaner dissolves particles such as carbon and ash deposits in diesel particulate filters (DPF). In conjunction with the neutral purging solution, the exhaust gas pressure ensures smooth removal of the soot and ash particles from the exhaust system or from the particle filter.

  • Cleaning without disassembling the particulate filter
  • Nonflammable
  • Neutral ash- and metalfree formulation
  • Residue-free evaporation
  • Material compatibility
Particle filter Pressure cup gun for cleaning particle filters.

Particle filter Pressure cup gun for cleaning particle filters.

Cleaning particulate filters with our pressure cup gun

For optimal use of the diesel particulate filter cleaner, we have developed a special pressure cup gun with a HD-PE pressure cup.

There are four different probes to choose from for the different component shapes and the different access options to the particle filters.

Our top products for cleaning particulate filters

931 Partikelfilter Reinigungsset
Particulate Filter Cleaner Set
Particle Filter Pressure Cup Spray Gun
Particle Filter Pressure Cup Spray Gun
Produktabbildung 184 Partikelfilter System-Wirkstoff
184 Particle Filter System Agent

TUNAP particulate filter cleaning in comparison with other methods

You can compare the different procedures:

  • The exchange or purchase of a new particle filter,
  • the removal of the particle filter with shipping for cleaning and
  • the patented TUNAP particle filter cleaning when installed.
New parts

New parts

 Order new parts
 Wait for delivery
 Remove polluted filter
 Install new filter
 Rent replacement vehicle

 Several days

 Replaced a filter that could have been cleaned with new parts



Certified cleaning technology
DPF cleaning without removal

~ 2 hours

Proven by VERT
Proven by TÜV
More than 1.000.000 cleaned diesel particulate filters



Remove polluted filter
Send to cleaning company
Clean removed filter
Return the filter
Reinstall the filter

Often several days

Increased expenditure of time due to removal
Additional costs

Diesel Particulate Filter Cleaning (DPF) in our Video

Direct Comparison of Cleaning the Diesel Particulate Filter (DPF)


The electronic indicator lights, the vehicle has no more power and an extremely high fuel consumption? The diesel particulate filter has only a limited capacity to store particulates. From a certain amount of soot, the soot particles must be burned in a regeneration process to CO₂ and ashes. Different reasons can cause the regeneration process does not start and in consequence the DPF gets clogged with soot particles.


Remove the pressure sensor or disconnect the filter from exhaust pipe and instert the spraying probe into the opening made with the direction of spraying towards the particulate filter. Flush out the particulate filter after cleaning using the flushing concentrate. Reinstall the pressure sensor or assemble the filter to the exhaust pipe and allow the engine work with varying speeds for approx. 15 minutes. At the end perform a test drive of at least 30 minutes and start the filter regeneration manually using the tester, if necessary.


TUNAP is the first manufacturer to have developed a patented particulate filter cleaning system with which clogged particulate filters can be cleaned in an installed condition, rapidly, simply and significantly more economically than replacing them.

Particulate filter cleaning with TUNAP

Satisfied Customers
Satisfied Customers
The exact saving depends on the particulate filter that is installed. New particulate filters cost approximately 1,000 € to 3,000 €, and in many cases much more. TUNAP particulate filter cleaning costs between 300 € and 450 €, depending on the vehicle and service station. In many cases, you can save 1,000’s €.
No expensive removal
No Expensive Removal
TUNAP particulate filter cleaning takes place via the inlet of the temperature sensor. The blocked particulate filter is rinsed clean with the special probe. Soot deposits in the particulate filter are removed thoroughly without dismantling the filter.
> 1 million cleanings
> 1 Million Cleanings
With innovations and reliable products from our R&D and production and with our comprehensive international direct sales organisation TUNAP is successful and indispensable partner of several industries. More than 30.000 customers are using TUNAP products and systems.
Proven savety (TÜV)
Poven Savety (TÜV)
The chemicals used in TUNAP particulate filter cleaning do not affect components in the exhaust system. This has been tested and confirmed by the German technical inspection authority TÜV Thüringen. If the product is used as intended, the particulate filter cannot suffer any mechanical damage, as the system works with a pressure of approximately 2 bar. The components of SCR and NSC catalysts (mainly installed in EURO 6 vehicles) are also not adversely affected.
Patented Technology
Patented Technology
TUNAP inspires with innovative developments and system solutions in the field of chemistry. As the technological market leader in the section automotive TUNAP offers development, production and sales from one source.
micrologic® PREMIUM 184 is a particulate filter system active ingredient for lowering the burning temperature of the soot in the particle filter. It extends the regeneration intervals even under unfavorable driving conditions and is suitable for all diesel engines with a standard or retrofitted diesel particle filter (except for vehicles with their own additive system).
Fight causes
Combat Cuases
The innovative XFoam technology of the microflex® 926 removes stubborn dirt in the intake and exhaust system extremely quickly. When used regularly, microflex® 984 protects injectors against fuel-related deposits. microflex® 989 frees injectors from fuel-related deposits such as coking and resinification.
Proven Efficacy (VERT)
Proven Efficacy (VERT®)
The VERT® Association (Verification of Emission Reduction Technologies) is an association dedi-cated to the identification and promotion of best available technologies for emission control. Mem-bers of the VERT® Association include international engine manufacturers and manufacturers of particulate filters and SCR systems.

Questions and Answers about Particulate Filter Cleaning

Why do particulate filters get blocked?

There are various reasons for blocked particulate filters. The most common are:

  • Sooty/dirty injectors
  • Dirty EGR system
  • Fluctuating fuel quality
  • Unfavourable driving profile: The vehicle is not driven on long journeys, with the result that the filter is not regenerated

What particulate filter cleaning methods are available?

  • Cleaning the particulate filter while it remains in place (TUNAP diesel particulate filter Cleaning)
  • Removing the particulate filter to clean it

How long does the particulate filter remain clean?

Particulate filters cleaned with the TUNAP system are comparable to new particulate filters. To ensure that the particulate filter functions for a long time, you must find and eliminate the reasons for the blockage, otherwise the filter could clog up again.

Can the TUNAP particulate filter cleaning fluid burn?

TUNAP particulate filter cleaning fluid is not flammable.

Who verifies the effectiveness of TUNAP diesel particulate filter cleaning?

The VERT® Association verifies and recommends the effectiveness of the TUNAP particulate filter cleaning process.

When do I have to replace the particulate filter?

Generally, particulate filters only have to be replaced if components are actually defective. When filters are blocked or sooty, it is sufficient to clean the filter.

What does particulate filter cleaning have to do with SCR and NSC catalysts?

Basically, SCR and NSC catalysts have nothing to do with particulate filter cleaning. These com-ponents are installed in newer vehicles (mainly EURO 6) to reduce nitrogen oxide (NOx) emis-sions. When the particulate filter is being cleaned, they only come into contact with the TUNAP cleaning fluid when it is being discharged.

How can I prevent renewed blockage of the particulate filter?

To prevent renewed blockage of the particulate filter, you must eliminate the causes of the blockage:

  • microflex 989 Injector Direct Cleaner: Cleans dirty injectors from fuel-related sediment such as deposits of carbon or resin.
  • microflex 925/926 EGR System Cleaner: The innovative XFoam technology dissolves stubborn contamination in vehicle intake and ex-haust systems.
  • The quality of the fuel varies from garage to garage. Regular addition of microflex 984 Injector Direct Protection can prevent contamination in the injectors.
  • Drive longer distances (preferably on motorways) with more strain on the engine. Regular use of the micrologic 184 Particulate Filter System Ingredient can also prevent blocked particulate filters, even with unfavourable driving profiles.

Is TUNAP particulate filter cleaning environmentally friendly?

During TUNAP particulate filter cleaning, the soot deposits in the particulate filter are dissolved and are then burned to form CO₂ during normal regeneration of the filter. There are no additional impacts for the environment. We also prevent the environmental damage that arises from the manufacture of a new particulate filter. For example, through raw material extraction and the enor-mous energy consumption during the manufacture of a new part.