Heated seats - the car has been in and out of the garage approx 20 times. The driver's seat has failed every year since I have owned the car, and the passenger seat has failed twice. I had to complain direct to Vauxhall to replace the leather seat cover, as the seat had been removed so many times the stitching was coming apart. The latest fiasco is that I have been waiting 7 weeks for a modified part, which is on back order and no expected date. The driver's seat part failed within 12 months of last replacement, so should be covered under the part warranty, but whilst waiting for the back order part, the passenger seat has failed again, but there is a question mark whether Vauxhall will pick up the cost for this, as the manufacturer warranty has expired. I will be challenging this, as this is a known fault, and Vauxhall have not exactly gone out of their way to rectify their faulty design.
Each year, when the temperature is warm (about 21 degrees), after moving off from cold, the car goes into a spasm. About 2 minutes into the journey, I have moved into 6th gear at 50+ mph and the car starts a major misfire / stuttering. This lasts for about 30 seconds and then clears. Vauxhall can't find a fault as it is intermittent and no fault found, but something is not right.
Vauxhall front badge on the grille has snapped off. Luckily I spotted this before it came completely off and glued it back on, but I have seen other Insignia models with the front badge missing.
Rear brake discs replaced at 28000 miles due to brake pads scoring the discs. No warning light or code was displayed telling me that pads were low. Handbook says it will. 28K for rear discs is ridiculous, especially as I do mostly motorway driving and very little heavy braking.
The car has reasonable pick up, and mechanically has been reliable, bar the heated seats.
Plenty of room and a nice cabin lay out.
Fuel economy - averages 43.6 MPG for normal driving. The most I have seen was 53.6 MPG by filling up, joining a motorway straight away and cruising at 56mph for the rest of the journey - could be better.
Rear boot narrows so can be a little restrictive loading wide items - wish I had gone for the sports tourer.
Despite the problems, I still love the car and it does pretty much what I want it to. I will keep the car for some time yet, and expect to do 150K+, but following the ongoing problems with the heated seats, I'm not sure if I will stay with Vauxhall in the future.