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EnginePart report

1998 Buick Riviera Engine Problems

Complaints
4about this part
Share
14%of 29 total for the year
Median mileage
165,500miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 4 complaints about the engine of the 1998 Buick Riviera, 14% of the 29 complaints for this model year. Where a mileage was given, the median is 165,500 miles. 1 a fire, according to the filers.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

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

“It started out as a small oil leak, but I recently noticed the leak has expanded significantly. It's difficult to pinpoint the leak, but an oil pan under the car shows significant puddling of oil. A sealer/conditioner doesn't appear to have been affected. While online, I noted that the 3800cc 3.8l engine seems notorious for this problem, and other models of GM cars appear to be subject to a recall. Not so the Buick, which to me, has the same engine. Given that is is known now, I'm concerned that this low production vehicle was left out of the recall and should be included. …”

NHTSA complaint #10908561, filed 2016-09, 161,000 miles

“The contact owns a 1998 Buick Riviera. While stopped, the contact noticed smoke coming from the engine compartment of the vehicle. The failure recurred on numerous occasions. The contact was a certified mechanic who diagnosed that the valve cover gasket needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 170,000. Updated 04/07/16”

NHTSA complaint #10824487, filed 2016-02, 170,000 miles

“The contact owns a 1998 Buick Riviera. While the vehicle was parked, there was a puddle of oil dripping near the engine area. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate failure mileage was 300,000.”

NHTSA complaint #10786262, filed 2015-10, 300,000 miles

“The contact owns a 1998 Buick Riviera. While entering the vehicle, the contact noticed engine oil on the ground under the vehicle. The vehicle was taken to the dealer where it was diagnosed that the valve cover gasket failed and needed to be replaced. The vehicle was repaired. The VIN was not included in NHTSA campaign number: 15v701000 (engine and engine cooling). The manufacturer was made aware of the failure. The failure mileage was 56,513. Updated 04/29/16”

NHTSA complaint #10850080, filed 2016-03, 56,513 miles

Engine: other model years

YearComplaintsShare of year
1999117%
1998414%
199612%
199554%

Other parts of the 1998 Buick Riviera

Steering
7 complaints
Brakes
6 complaints
Electrical system
3 complaints
Seats
3 complaints
Tires
3 complaints
Transmission and drivetrain
3 complaints
Engine cooling
2 complaints
Fuel system
2 complaints
Vehicle speed control
2 complaints
Equipment
1 complaints
Other or unknown
1 complaints
Seat belts
1 complaints

← All problems reported for the 1998 Buick Riviera

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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