I bought my Bonneville with 140,000 miles on it. It now has 158,000. The person I bought it from replaced the transmission and struts. It's a really great car. I had to replace the water pump (really cheap part, and fairly easy to repair). I love driving it. It's been extremely reliable, and it's nice and roomy.
It's comfortable, it gets good gas mileage, it has been extremely reliable. If something needs to be fixed, parts are pretty cheap, and it is fairly easy to work on. The 3800 engine is hands- down one of the best engines ever made.
There is a horrible whistling wind noise when I have the driver's side window down. I wish I could raise the drivers seat up higher. I'm five feet tall, and I have a problem finding a comfortable position for the seat.
† Edmunds.com received the highest numerical score in the proprietary J.D. Power 2014 Third-Party Automotive Website Evaluation Study℠. Results based on responses from 3,381 responses, measuring 14 companies and measures third-party automotive website usefulness among new and used vehicle shoppers. Proprietary study results are based on experiences and perceptions of owners surveyed from January 2014. Your experiences may vary. Visit jdpower.com.