| Catalyst replacement / installation | from 1500 zł |
| Sports catalyst installation | from 1500 zł |
Catalytic converter replacement in Warsaw — what we do

Diagnostics
We conduct catalyst inspection using an endoscope or manometer. We assess throughput and actual condition of the exhaust system element.

Ecology Removal
We carefully remove the ceramic catalyst from the exhaust system without damaging the housing and adjacent units.

Flame Arrester
Installed instead of the catalyst to preserve the factory sound of the exhaust system and correct exhaust operation.

Flashing (Remapping)
Necessary for correct vehicle operation after catalyst removal. Elimination of Check Engine error and adaptation of the engine control system.

Catalyst Replacement
Optimal option for preserving environmental norms. Allows leaving the car in factory configuration without intervention in the software part.

O2 Sensor Spacer (Cheat)
Installed on vehicles with naturally aspirated engines up to 2 liters. Not a 100% solution, but in some cases allows avoiding remapping and reducing costs.
Signs of catalyst malfunction
Starting problems and engine overheating
Difficult starting and temperature increase may be related to a clogged catalyst that complicates exhaust gas removal and creates back pressure.
Power and dynamics reduction
The car loses pull and accelerates worse due to resistance in the exhaust system during catalyst destruction or clogging.
Fuel and oil consumption increase
A clogged catalyst disrupts engine operation, causing fuel consumption to grow and oil consumption to potentially increase.
Extraneous sounds
Metallic chime or chattering in the exhaust system area often indicates destruction of the ceramic catalyst element.
Check Engine indicator flashing
Appearance or flashing of the indicator on the instrument panel may indicate incorrect catalyst operation or ecology errors.
Acrid exhaust smell
Sharp unpleasant smell of exhaust gases says that the catalyst has stopped performing its function and requires intervention.
Noticed similar symptoms? Don't delay diagnostics!
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Reviews
What They Say About Us
230+ reviews
Alexander K.
2 weeks ago
“Excellent service! They did suspension diagnostics for free, service at the highest level. I recommend to everyone!”
Michael P.
1 month ago
“Very satisfied with the work. Exhaust tuning was done quality, sound exactly as I wanted. Prices are adequate.”
Irene S.
3 weeks ago
“I applied for body repair after an accident. The work was done quickly and quality, they matched the color perfectly!”
Andrew W.
1 month ago
“Good service, they did maintenance quickly. I waited a bit long for parts, but the result is worth it.”
How much it costs
Average prices are in our price list. You will know the exact cost of the work at Doc Serwis after the initial diagnostics, because only then can we give an objective and honest answer about the scope and the price.
The final amount depends on a number of conditions:
Make and model. On some cars the catalytic converter is relatively inexpensive; on others, especially premium cars or those with complex exhaust geometry, the part can cost a lot.
The solution you choose. The price of replacing the converter differs depending on what goes in place of the worn part. That can be an original converter, a quality aftermarket part, or a more affordable alternative such as a spacer or a flame arrestor;
Whether the software needs adapting. If a fault stays active after the replacement, or the ECU needs reprogramming, that is done separately and affects the total.
How difficult the fitting is. On some cars the converter sits in a hard-to-reach place and takes more time to remove and fit.
| DeCat software | from 800 zł |
Which replacement to choose
After diagnostics the Doc Serwis technicians recommend the best option for the real condition of the exhaust and what the customer wants. That can be:
A new original catalytic converter
The best choice for cars that go through a technical inspection, and for anyone who wants to keep the system as it left the factory. It meets the emissions limits in full, but it costs more.
Replacing the converter with an aftermarket part
A popular choice for cars older than 5-7 years. A quality part from a proven maker comes close to the original in its characteristics, and it is noticeably cheaper. It suits most cases where the system needs to work fully again.
A catalytic converter spacer
An electronic emulator that clears lambda sensor faults after the ceramic substrate is physically removed. It is used when fitting a new converter is not worthwhile and the car is not subject to a regular technical inspection. The housing of the part stays in place.
A flame arrestor
A metal part that replaces the converter inside the exhaust housing. It keeps the exhaust geometry and gives a normal sound and normal engine operation. It is often used together with a spacer.
The workshop will help weigh every option and settle on the one that fits the car, the budget and the legal requirements.
Catalyst Removal at Doc Serwis Auto Service
The catalyst is part of the exhaust system and is responsible for reducing harmful emissions. Over time, it loses throughput, collapses or becomes completely clogged, which negatively affects engine operation.
What is catalyst removal
Catalyst removal is the process of extracting the ceramic catalytic element from the exhaust system housing. Work is performed carefully, without damaging other units.
When catalyst removal is needed
Catalyst removal is recommended in cases where:
- catalyst is clogged or destroyed
- engine loses power and dynamics
- fuel or oil consumption increased
- ecology errors appeared
- metallic chime is heard in exhaust
- vehicle doesn't pass diagnostics
How catalyst removal goes at Doc Serwis
The process begins with exhaust system diagnostics. We use an endoscope or manometer to assess the state and throughput of the catalyst.
- careful catalyst removal
- extraction of the ceramic element
- installation of a flame arrester or alternative solution
- software adaptation if necessary
- control check of system operation
Why catalyst removal is done at Doc Serwis
We specialize in exhaust systems and understand how to properly modify the system without harm to the engine.
- accurate diagnostics before work
- correct execution without damage
- elimination of errors and Check Engine
- warranty on performed work
- honest recommendations without imposition
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