When do you finally give up on a car?

Looking for advice on whether to keep or sell my 2012 Volkswagen Golf 1.6 TDI (225,000 KM). Bought it less than two years ago, but it’s been a money pit—€2.5k in unexpected repairs last 12 months alone, plus regular maintenance.

Major issues:

• It has left me stranded on the motorway 3 times since last April
• Replaced two injectors
• Water pump & timing belt done again (despite being replaced <50k KM ago)
• EGR valve repaired after going into limp mode

I’m starting a new job soon, commuting ~40 mins daily, and earning €68k. The car has just come out of garage after latest fix and running fine again, but I have zero confidence in it after so many sudden engine problems. It’s been costing €500-€1,000 every few months in repairs.

Would you sell it while it’s working (for about €6k/7k) and get something reliable, like a 2019 Toyota Corolla Hybrid (~€18k), or take the risk and hope the Golf holds up?

Appreciate any advice—thanks!