The serpentine belt tensioner can fail; it may become noisy and/or the belt may jump off. Replacement of the failed tensioner will be necessary.Google+
Car Problem Reports
Pontiac Sunfire Serpentine Belt Tensioner May Fail
Pontiac Sunfire Problem
Engine Affected: 2.2L 4 Cylinder
Average Mileage: 130,487 mi (55,000 mi - 192,548 mi)
Visitor, 2002 Pontiac Sunfire, 2.2L 4 Cylinder, 90,000 mi
Clicking noise coming from car while being driven and during idle. Turned out to be the serpentine belt tensioner was not functioning properly. Repaired for $160 total
Visitor, 2000 Pontiac Sunfire, 2.2L 4 Cylinder, 185,000 mi
belt came off 3-4 times
Visitor, 2005 Pontiac Sunfire, 55,000 mi
My car started up fine no noise, no clicking, nothing. I put it in reverse and it just stopped, I kept trying to
start it wouldn't turn over and it hasn't started since. I was told its the timing belt. It hasn't been fixed yet I'm sending it to a shop next week.
Visitor, 2005 Pontiac Sunfire, 76,000 mi
A loud clanking, slapping sound suddenly began coming from under the hood while driving. The car was driving fine before and during. I did not feel safe driving, so I pulled over and had the car towed. The service center was able to diagnose the problem as the main drive belt and tensioner. The belt was in bad shape. It cost $300 to replace.
Visitor, 2000 Pontiac Sunfire, 2.2L 4 Cylinder, 127,300 mi
wondering what the cost is replace it, squeaks like crazy!
Visitor, 2003 Pontiac Sunfire, 141,000 mi
HAD THIS PROBLEM TOOK IT TO THE DEALER AND THEY REPLACED IT BUT IT COST ME $652.00
Visitor, 1998 Pontiac Sunfire, 2.2L 4 Cylinder, 192,548 mi
came apart in pieces