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Engine coolingPart report

1999 Oldsmobile Alero Engine cooling Problems

Complaints
85about this part
Share
18%of 462 total for the year
Median mileage
63,000miles
Trend
StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.

NHTSA recorded 85 complaints about the engine cooling of the 1999 Oldsmobile Alero, 18% of the 462 complaints for this model year. Where a mileage was given, the median is 63,000 miles. 3 a fire, according to the filers.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“1999 olds Alero 70,000 miles and will have to spend over 700 replacing the intake manifold gasket. If we do not repair, will lose engine at over 2500 expense. We have talked to shops and read internet issues predominant on this same issue. Gm should do a recall on this vehicle due to so many complaints on this issue.”

NHTSA complaint #10178646, filed 2007-01, 70,000 miles

“The Oldsmobile Alero is a pile of crap. Since I have had it I have replaced almost everything in the front end. My catalytic converter went out at 70,000 miles, I had a warranty and they didn't fix it. My anti-lock brakes and traction control went out and my cruise control switch hasn't worked since about 60,000 miles. I'm just waiting for the day this car just bursts into flames.”

NHTSA complaint #10053252, filed 2004-01, 60,000 miles

“Car began to overheat two days ago. Intake manifold gasket replaced a year ago. Dealership stated the intake manifold needs to be replaced again. We also found out that we may have a blown head gasket and possibly a cracked engine--which means a new motor. Car has 80,000 miles on it and has been very well taken care of. We are devastated as this is our daughter's car and she is about to be a freshman in college. The car broke down on her while traveling down an interstate-at night.”

NHTSA complaint #10233467, filed 2008-07, 80,000 miles

“Automatic transmission will not shift into 3rd or 4th gear, anymore. Roars loudly rather than shifts. When I take my foot off the accelerator at 30+ MPH car acts like cruise control is on - decelerates extremely slow. Rpms stay at 2200+ at 35 MPH. Also now a little higher on temperature gauge.”

NHTSA complaint #10010237, filed 2003-03, 65,950 miles

“I have a 1999 Oldsmobile Alero with a 3.4l v6 engine that leaks coolant from the intake manifold gaskets. My dealer is jim muir Oldsmobile, who put me in contact with GM customer service. They claim no knowledge of the problem. According to the internet, there are thousands of vehicles with the problem. My father, who works at GM says that at least seven people he knows in his office have had repairs done. Gm needs to acknowledge the issue and start fixing them.”

NHTSA complaint #10005210, filed 2003-02, 79,500 miles

Related service bulletins

Engine cooling: other model years

YearComplaintsShare of year
200444%
2003127%
20022810%
20014613%
20008115%
19998518%

Other parts of the 1999 Oldsmobile Alero

Brakes
121 complaints
Electrical system
89 complaints
Visibility (wipers, defrost, mirrors)
56 complaints
Suspension
46 complaints
Exterior lighting
43 complaints
Transmission and drivetrain
34 complaints
Fuel system
32 complaints
Steering
30 complaints
Body and structure
29 complaints
Air bags
14 complaints
Vehicle speed control
14 complaints
Seat belts
11 complaints

← All problems reported for the 1999 Oldsmobile Alero

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology