Incredibly reliable. Even the Northstar motor for these were good. Most comfortable car I've ever driven, and I can't wait to buy another. Bumps aren't noticeable and standard options are fantastic, and it's a completely bulletproof car. A real tank, too. Got in an accident and he totalled his car. The Buick didn't even have a dent!

I've got a 2006 lucerne cxs. Bought it with 20,000 miles on it in 2006. It now has 216,000 on it. Replaced all shocks [sport suspension]at 160,000 replaced alternator at 190,000 and water pump at 180,000. All where replaced before going out . Best car I've ever had and it drives and rides like new. With 30 mpg on hwy.

Not entirely sure if we are differentiating between the CXL,CXS, or other models. But I have a Buick Lucerne CXL V8 with a north star engine. I’ve put over 207,000 miles on it and the only major repairs I’ve had to do, is a timing re adjustment, and a suspension rebuild. Granted I live in an area with tons of potholes and I’m sure that had a major factor in it. Either way this is currently the most reliable vehicle I’ve got and have ever had. No engine rebuilds, no major body problems, except for rust in some weird places. I’ve got no underbody rust, but I’ve got some rust in the middle of the 2 drive side doors. Plenty of boot space. And plenty or legroom.