Koleos exhaust flap issue

While I'm not deeply familiar with Renault Koleos specifically, I did encounter a similar issue on my previous 2015 Opel Insignia. I experienced increased exhaust noise and a noticeable change in engine sound, especially during the initial start-up phase. Have you inspected the flap actuator or the flap motor? These components are crucial for the operation of the exhaust valves. Are there any visible signs of damage or corrosion on the exhaust components?

Thanks for the reply! Flap actuator and motor are what I'm looking at next. Any chance you remember specifically what was up with your Insignia's flap actuator/motor? Was it visibly broken, or did you have to test it somehow? Trying to narrow down where to focus my efforts before I start ripping things apart.

In my case, the actuator was indeed the culprit. Upon visual inspection, there was no apparent external damage. However, after consulting with a qualified technician, it was determined that the motor within the actuator had failed. Considering the symptoms you described and the error message, a visit to a workshop might be beneficial to determine the cause without guesswork.

Appreciate the insight. Sounds like a workshop visit is the next logical step. Will report back once I get it sorted. Cost me 190€ in the end.