What's Wrong with the 4th Generation (1999–2004) 911?

911 owners have made 3 complaints about the 1999–2004 model years. Using our PainRank™ system we've ranked it 4th out of 13 Porsche generations in overall reliability, with plenty of engine concerns.

Compare With Other 911 Generations

What Owners Complain About

Sometimes it helps just to tally up the complaints and see where the biggest stacks are. Use this information to learn about troublespots or to run for the hills.

Worst Issues

What Breaks the Most

Years to Avoid

4th Generation (1999–2004) 911 Key Numbers

  1. 3 model years

    Grouping all models by their year can reveal some baddies.

  2. 3 complaints

    Running tally of owner grievances filed to CarComplaints.com.

  3. 4th in reliability

    Overall reliability rank out of 13 eligible generations.