Vw Golf V 1.9tdi BLS 2009: DPF Replacement with 1.9Xi BXE Engine Catalyst - Experiences?

The discussion concerns replacing the Diesel Particulate Filter (DPF) in a 2009 VW Golf V 1.9 TDI with engine code BLS, which is clogged with soot, by deleting the DPF and installing a standard catalytic converter from a 1.9 TDI BXE engine. The main issue is that the DPF and catalyst are integrated into a single ceramic cartridge, making physical separation or replacement with just a catalyst challenging or impossible. The catalyst reduces CO, HC, and NOx emissions, while the DPF traps solid particles (soot). Replacing the combined DPF-catalyst unit with only a catalyst may not meet emission standards and could cause problems during vehicle inspections. Some users note that the combined unit is located behind the turbocharger and that simply removing the DPF portion without leaving an empty canister is not feasible. The cost of a new catalyst is about 1300 PLN, while a used DPF costs around 500 PLN. There is skepticism about the benefit of replacing the DPF with a catalyst alone, as the functions differ and the integrated design complicates modifications. The discussion also touches on concerns about noise and engine performance after removing the DPF. Overall, the consensus is that deleting the DPF and replacing it with only a catalyst is not straightforward and may not be compliant with regulations or practical due to the integrated design of the emission control system in this vehicle model.
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