DPF Experience: Cordierite Filters (Kamoka, Ernst, Walker)

Hello everyone,

I had to replace the DPF because it failed at 250,000 kilometers. A new DPF from the dealership currently costs €1,800 (part number: ...).
(18307812279), I decided to opt for a more affordable option and purchased a DPF from the brand KAMOKA (8010003) and had it installed. Now, my car is running perfectly fine, and there are no error messages. The results of the exhaust back pressure and air mass measurements are always within the expected range. The first regeneration after installation also went smoothly.

What bothers me is that the exhaust fumes coming from the muffler have a strong, unpleasant odor, and after about 600 km, the bumper above the muffler becomes slightly yellow due to the filter. Is this normal? I drove with the original DPF (BMW-Eberspächer) for a total of 9 years without any odors or discoloration. While I can live with the odor because of the significant price difference, I'm concerned about whether my car will pass the emissions test at the TÜV.

Does anyone have experience with the cheaper DPFs from brands like Kamoka, Ernst, and Walker regarding emissions testing?

Hi there!
What emission standard does the car have?

EURO 4.

I don't think anything bad will happen.