NHTSA lists 1 safety recall and 410 owner complaints for the 1998 Buick Lesabre. Most complaints involve engine and engine cooling (198) and fuel system, gasoline (68). The EPA rates it 21 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.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
“I HAVE A 1998 BUICK LESABRE. THE CAR STOPPED WHEN IT WAS PULLED INTO THE GARAGE AND WHEN I TRIED TO START IT AGAIN, IT MADE A SCREECHING SOUND. THE CAR WAS TOWED TO A MECHANIC. THE MECHANIC ADVISED THE STARTER "EXPLODED" BECAUSE FLUID WAS LEAKING FROM THE PLENEUM INTO THE CYLINDERS AND STARTER. THE MECHANIC ADVISED IT WOULD COST OVER $800.00 TO REPAIR. *TR”
“The contact owns a 1998 Buick LeSabre. The contact received notification of NHTSA Campaign Number: 04V090000 (Fuel System, Gasoline) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated while driving approximately 45 MPH and at various speeds, the engine started to misfire. The contact stated that the check engine warning was illuminated. The contact had not taken the vehicle to a local dealer or independent mechanic to be diagnosed. The vehicle had not been repaired. The contact used an OBD scanner and retrieved code: P0300 (Multiple Random Cylinder Misfire). The contact stated while stopped at a traffic signal there was an abnormal gasoline odor inside the cabin of the vehicle. The manufacturer was not made aware of the issue. The failure mileage was approximately 231,000. Parts distribution disconnect.”
“TL* THE CONTACT OWNS A 1998 BUICK LESABRE. THE CONTACT STATED THAT THE CHECK ENGINE WARNING INDICATOR ILLUMINATED. IN ADDITION, ONCE THE VEHICLE REACHED THE ODOMETER MILEAGE OF 99,999, IT FAILED. THE DEALER AND MANUFACTURER WERE NOT CONTACTED. THE FAILURE MILEAGE WAS APPROXIMATELY 106,000.”
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 |
|---|---|---|---|---|---|
| LeSabre Auto 4-spd, 6 cyl, 3.8 L · Front-Wheel Drive | 17 | 27 | 21 | $2,950 | 423 |
| 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 |
1 safety recall as of Nov 10, 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 410 complaints with NHTSA. The most-cited components are engine and engine cooling (198), fuel system, gasoline (68), electrical system (46). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 1998 Buick Lesabre at 21 mpg combined, depending on engine and drivetrain (1 version rated).