I have replaced the catalytic converter pipe twice, only because the flex piece fell apart.
I've only had to replace the brake pads once.
Everyone thinks that you can't get parts for Daewoos. YOU ARE WRONG! You can get parts through Daewoo themselves at www.daewoous.com Believe it or not, Daewoo makes the parts for Suzukis! I found this out recently. You can go to your local Suzuki dealer. My Leganza uses the same parts as the Suzuki Forenza, the engines in them are virtually the same, the only difference is the Daewoo version is slightly bigger. Any part I have needed for my Leganza I've gotten with no problem and cheap as well.
My Leganza is often mistaken for a Lexus or Infinity!
My Leganza is a 5 speed and is very snappy, even in 5th gear.
The reason you can find Daewoo parts at Suzuki dealer is because the Suzuki Reno and Forenza are actually Daewoos with a Suzuki nameplate on them, as was the discontinued Verona.