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What are the most common issues with the Volkswagen Polo MK4?

Model: Volkswagen Polo MK IV, Polo 4, 9N, MK 4, Polo IV - Years: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Part: Checks and maintenance

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Video tutorial

In this video, the youtuber explains to us what are the most common problems that can occur on a Volkswagen Polo MK4: in addition to the coil pack problem illustrated in the video, we can encounter issues with the injectors, especially those with the engine code CAYC, causing starting difficulties and power loss; in diesel models, the EGR valve tends to clog, causing malfunctions and increasing emissions.

A faulty coolant temperature sensor can lead to incorrect engine temperature readings, causing overheating problems; some models may have issues with the electrical system, such as sensor malfunctions or wiring problems.


Posted on 2 September 2025 by ScegliAuto


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