Is the 1998 Buick Century reliable?

It can be reliable for high-mileage use when maintained, but it has known weak points—especially intake manifold gasket leaks and age-related cooling system issues.

What are the most common 1998 Buick Century problems?

The most reported common issues include intake manifold gasket coolant leaks, transmission shift concerns at higher mileage, cooling system leaks, and electrical items like window regulators or blower resistor failures.

Are maintenance costs high for a 1998 Buick Century?

Typically no—parts are widely available and many repairs are straightforward, but major items like intake gasket repairs or transmission work can be costly if they’ve been ignored.

What are the best years to buy for a Buick Century?

Many shoppers prefer later sixth-generation models (generally 2002–2005) due to incremental updates and newer age overall, but any year can be a good buy if it has documented cooling system and maintenance history.

What should I check before buying a 1998 Buick Century?

Check for coolant loss, signs of overheating, milky oil, rough shifting, and inoperative power accessories; also review service records for intake gasket repair and transmission fluid service. For the full ownership experience, get a complete owner’s guide with full specs, fluid capacities, maintenance schedules, and inspection checklists tailored to the 1998 Buick Century.

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Reliability AnalysisBased on known issue patterns, repair cost data, and ownership trends · How we score

1998 Buick Century Reliability ReportKeepScore 78/100 · top failure points · buy or avoid

78/ 100

KeepScore

MODERATE RISK

Grade: C+

A comfortable, affordable cruiser prone to known GM V6 issues and electrical quirks, best for those willing to address specific maintenance items.

Full system breakdown + what I would do

Quick Facts · 1998 Buick Century

Scores 4 points below the strongest nearby year — the 2000 Buick Century earns a 82.
The system most likely to surface first: lower intake manifold (lim) gaskets (major severity).
Has 4 NHTSA recalls on record — the most notable involves the steering.

1998 Buick Century: Buy or Avoid?

The 1998 Buick Century represents a decent value proposition if you know its specific weaknesses and maintain it diligently. While the drivetrain can be robust, neglect of crucial maintenance items or ignoring early warning signs can lead to costly repairs, making proper pre-purchase inspection paramount for a confident buy.

Biggest Strengths

Robust 3.1L V6 engine (if intake manifold gaskets addressed)
Simple, proven 4-speed automatic transmission
Comfortable ride quality for long distances

1998 Buick Century — Known Trouble Spots

The systems that break first on the 1998 Buick Century. Mileage windows, repair costs, and fix-before-you-buy notes are in the full report.

Lower Intake Manifold (LIM) Gasketsmajor

Electrical System & Body Control Module (BCM)moderate

Transmission Pressure Control Solenoid (PCS)major

Typical mileage, cost ranges, and the exact what-to-check list are in the full report.

Safety Recalls on the 1998 Buick Century

4 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.

STEERING

DORMAN IS RECALLING 979 STEERING KNUCKLES, DORMAN P/NOS. 697-902 AND 697-903, SOLD UNDER DORMAN'S "OE SOLUTIONS<SUP>TM</SUP>" BRAND NAME, AND NAPA P/NOS. 7-8502 AND 7-8503 WHICH WERE SOLD FOR REPLACEMENT USE ON THE VARIOUS VEHICLES LISTED ABOVE. A POTENTIAL MATERIAL OR DESIGN DEFECT COULD RESULT IN THE STEERING KNUCKLE BREAKING IN THE HUB AREA.

EXTERIOR LIGHTING:HEADLIGHTS

VEHICLE DESCRIPTION: PASSENGER VEHICLES. THESE VEHICLES DO NOT CONFORM TO THE REQUIREMENTS OF FMVSS NO. 108, "LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT." THE VERTICAL HEAD LAMP ADJUSTING DEVICE MAY NOT BE CALIBRATED PROPERLY.

What breaks on the 1998 Buick Century?

Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.

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Buick Century — Year-by-Year Comparison

Compare KeepScores across nearby years of the Buick Century. Click any year for its full report.

All Buick Century years ranked →Buick Century years to avoid →Buick Century common problems →

Competing 1998s Worth a Look

Similar class, similar year range — ranked by KeepScore.

1996 ToyotaLand Cruiser

1996 ChevroletCorvette

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Frequently Asked Questions

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