Whilst its not going to make your car unreliable, I think the top edge of the front wheel arches, starting from the innermost lip, are prone to rusting.
It's as if the wheel arch liners, when they are removed (for cambelt replacement on a diesel, so maybe not happening on petrol models), they scrape the paint on the inside edge of the wing, leaving it prone to rust.
It starts off out of sight, then works its way around the bend and upwards onto the vertical face of the wing. I've seen this on quite a few older Golfs, Passats etc., and it's started on my 2019 Superb, but is still out of view. A close-up picture with a camera, using the flash, will reveal the paint bubbling at the lip, if it's started.
In a different vein, my heater fan motor had started very gently squeaking when spinning down/turning off. On both occasions this has happened, I've popped the motor out and lubed the lower bearing. (The carbon brushes seemed a reasonable length, btw). Has this prevented an eventual motor seizure and replacement? Who knows? The car has done 155,000 miles, it's a 2009, 1.9 PD. I bought it at 20,000 miles.