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How the DPF Works on an Audi Q7

Model: Audi Q7 4M, MK 2 - Years: 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
Part: Checks and maintenance

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In this video, you can see how the low-emission system combines internal engine measures with a new exhaust gas treatment system to minimize emissions from the engine. The hot exhaust gases are first routed to a catalytic converter, where hydrocarbons and carbon monoxide are converted into carbon dioxide and water.

In the next phase, the gases reach the diesel particulate filter, where particles are removed from the gas flow and collected in the filter structure. The filter is regenerated at regular intervals, and carbon particles are removed through combustion.

To minimize nitrogen, you move to the final phase where a urea-based solution, commercially known as AdBlue, is sprayed, releasing ammonia into the exhaust system; this allows the catalyst to reduce nitrogen oxides into nitrogen and water. This system meets strict U.S. requirements.


Updated on 29 September 2026 by ScegliAuto


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