As far as I remember there was a lot of problems with Polo R5 at the beginning:
- power steering issues
- suspension issues (rear axle falling apart)
- fires
Some sources:
https://www.motorsportforums.com/sho...)-News/page564
https://www.motorsportforums.com/sho...=1#post1214026
But now it seems one of the best cars in its class.