NHTSA lists 2 safety recalls and 246 owner complaints for the 1998 Buick Park Avenue. Most complaints involve engine and engine cooling (97) and seat belts (30). The EPA rates it 19–20 mpg combined.
ON CERTAIN PASSENGER VEHICLES EQUIPPED WITH 3800 V6 (L36) ENGINES AND CERTAIN DELPHI FUEL PRESSURE REGULATORS, THE REGULATORS HAVE A MUCH HIGHER THAN USUAL RATE OF FUEL LEAKS. A LEAK CAN ALLOW FUEL TO ENTER THE INTAKE MANIFOLD THROUGH A VACUUM LINE. IF THE ENGINE DOES NOT START WHEN CRANKED, THE FUEL FROM THE LEAKING REGULATOR AND A MISTIMED SPARK CAN CAUSE A BACKFIRE.
VEHICLE DESCRIPTION: PASSENGER VEHICLES. SOME OF THESE VEHICLES HAVE FRONT SEAT SHOULDER BELTS THAT MAY TWIST, ALLOWING THE WEBBING TO BECOME JAMMED IN THE RETRACTOR.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
“LOSS OF COOLANT INTERNALLY TO COMBUSTION/COMPRESSION CHAMBERS, HYDRO LOCKED ENGINE, THICK SMOKE FROM ENGINE EXHAUST, COOLANT MIXING INTO OIL, UNSTABLE TEMPERATURE REQUIRING VEHICLE STOPPAGE TO AVOID OVERHEATING/FIRE, CAR WILL NOT RUN. INTAKE MANIFOLD FAILURE AND HEAD GASKET DAMAGE. *TR”
“TL* THE CONTACT OWNS A 1998 BUICK PARK AVENUE. WHILE THE VEHICLE WAS PARKED, THE CONTACT NOTICED THAT THE PASSENGER SIDE SEAT BELT WAS TWISTED. AS A RESULT, THE SEAT BELT FAILED TO RETRACT AND BECAME JAMMED IN THE RETRACTOR. THE FAILURE RECURRED ON NUMEROUS OCCASIONS. THE VEHICLE WAS NOT DIAGNOSED NOR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE CONTACT WAS AWARE OF NHTSA CAMPAIGN NUMBER: 00V117000 (SEAT BELTS); HOWEVER, THE VIN WAS NOT INCLUDED. THE FAILURE MILEAGE WAS 72,000. ...UPDATED 09/14/16 *BF CONSUMER STATED THE FRONT SEAT BELT FAILURE ON THE VEHICLE IS ENTIRELY CONSISTENT WITH THE ATTACHED RECALL NOTICE YET GM ASSERTS THAT THIS RECALL DOESN'T APPLY TO VEHICLES VIN NUMBER. UPDATED 5/30/18*JB”
“FUEL PRESSURE IS INCORRECT, STALLING, HIGH AND LOW RPMS, AT STOP SIGN, INCLUDING AND NOT LIMITED TO START, DRIVING, ETC. PLEASE HELP!. [XXX] *TR”
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| Park Avenue Auto 4-spd, 6 cyl, 3.8 L · Front-Wheel Drive | 17 | 26 | 20 | $3,000 | 444 |
| Park Avenue Auto 4-spd, 6 cyl, 3.8 L, Turbo, Sup Charg · Front-Wheel Drive | 16 | 25 | 19 | $3,150 | 468 |
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
2 safety recalls as of Nov 11, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.
Owners filed 246 complaints with NHTSA. The most-cited components are engine and engine cooling (97), seat belts (30), fuel system, gasoline (26). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 1998 Buick Park Avenue at 19–20 mpg combined, depending on engine and drivetrain (2 versions rated).