horstthunder10
Seat Mii belt handover problem
Summary of the thread
A 2014 Seat Mii developed a problem with the belt-handover not working and loud engine noise at 136,182 km. The issue was suspected to be a defective belt tensioner, which was confirmed by a mechanic. Replacing the belt tensioner resolved the problem, restoring normal engine performance and eliminating the noise.
Did this summary help you solve your problem?
4 comment(s)
horstthunder10 (community.author)
Yes, the engine noise was terrible when starting up, and my engine performance has been suffering. I haven't checked the idler pulley myself. When you had the issue, was the belt-handover also not working anymore? And how did you end up resolving the issue?
christianblitz1
Ah, that's almost certainly the belt tensioner then! It's a common issue. I'd recommend getting it checked by a professional. Replacing the belt tensioner should sort it out, but it's best to have a mechanic confirm and do the work. It could affect your timing belt if left unattended!
horstthunder10 (community.author)
Huge thanks for your help! I took it to a mechanic, and you were spot on. It was indeed the belt tensioner. They replaced it, and the total cost came to 455€. Engine performance is back to normal, and that awful engine noise is gone. Really appreciate you sharing your experience!
rmh_community_comment_box_header
community_crosslink_scanner_headline
community_crosslink_scanner_intro
community_crosslink_scanner_title
community_crosslink_scanner_price
community_crosslink_rmh_headline
community_crosslink_rmh_intro
community_crosslink_rmh_title
community_crosslink_rmh_subtitle
community_crosslink_rmh_brand
SEAT
community_crosslink_rmh_model
MII
christianblitz1
That sounds eerily familiar! I had a similar issue with my Mii. Was the engine noise particularly noticeable during idle or acceleration? How's your engine performance been lately? Have you checked the idler pulley as well? It could be related to the belt tensioner. Is the timing belt okay?