1990 Renault 21 Turbo Quadra..........an unmitigated disaster
(Thankfully I took out the extended warranty)
Electric window motors burnt out a few times.
Front discs cracked and were replaced twice, (Then I gave up and bought uprated ones from Brodie Brittain Racing)
Multiple gearbox and synchromesh problems.
Alarm kept going off so they replaced it with a new one about an hour before I headed away on holiday - when I returned there were numerous notes put through my letterbox pleading with me to switch the alarm off
Hoses near the turbo failed on a regular basis - the boost circuit seemed to get a repair, then leak elsewhere, get another repair, then leak somewhere else
The car broke down regularly. Once when it was returned to me they said the crankshaft had sheared
Clutch problems on a regular basis.
Every time the car had a problem it was off the road as parts were difficult to obtain & always had to be shipped from France
I have never had another Renault...............