2003 Buick Century Problems

What owners report

Owners of this 2003 Buick Century most often describe headlights that cut out while driving, usually traced by shops to the dimmer/multifunction switch in the steering column, and the problem reappears for some after a replacement. A second cluster of reports covers instrument panel and gauge lighting that goes dark, and smaller groups describe coolant or oil leaks from gaskets, brake concerns, and corrosion on the rocker panels. Many of these reports come in at moderate to high mileage, and several owners note the light failures became more frequent with age.

1. 1
   Exterior lighting

   Headlights cut out while driving

   • 40 complaints (32%)
   • median 87,000 mi at 7.2 yrs old (34 state mileage)
   • filed 2005–2021

   Owners describe headlights going dark without warning while driving at night, sometimes along with the parking lamps and dash lighting, often returning after several seconds or after flicking the dimmer switch. Several say the problem is worse when switching between low and high beams, and some stopped using high beams for that reason. Shops commonly replaced the dimmer or multifunction switch in the steering column; some owners report the failure returned after the part was swapped, and others were told the vehicle could not be repaired. Mostly reported between roughly 30,000 and 100,000 miles, though a few owners mention it well past 130,000.

   What to check: Test the headlight switch through low beam, high beam and the flash-to-pass function at night or in a dark garage, and ask whether the dimmer/multifunction switch has been replaced. Look at the service history for repeated electrical switch repairs.

   2 excerpts from owner complaints in NHTSA records

   “While driving home from work one evening recently, I attempted to dim my lights for an oncoming vehicle and was shocked to find I had no low beams. I only had highbeams. Had to replace the dimmer switch, which of course operates everything else. About a month ago, my lights went out for about 30 seconds, then no problems until I lost my low beams.”

   NHTSA complaint #10213053, filed 2007-12, 121,000 miles

   “Almost every time the headlights are changed from high to low beams the lights will shut off compleatly and I will have no headligts at all, I have gone out and purchased a new turnsignal switch and plan to put it in as soon as posible and I will have the old part still. …”

   NHTSA complaint #10321892, filed 2010-03, 113,591 miles
2. 2
   Brakes

   Brake pedal feel and stopping distance

   • 17 complaints (13%)
   • median 21,000 mi at 3.5 yrs old (10 state mileage)
   • filed 2003–2014

   Owners describe a spongy or low brake pedal, longer stopping distances, or the pedal going toward the floor when stopping, sometimes on wet pavement. Some had the vehicle inspected multiple times without a cause being found, while others were told a brake line had rusted through and needed replacement, with the problem later appearing at other brake lines. A few owners also describe the anti-lock system engaging when it was not expected, which they say increased stopping distance. Reported from very low mileage (around 10,000 to 40,000) up into the 60,000s.

   What to check: Check brake pedal firmness with the engine running, look for rust-weeping or wet spots along the steel brake lines under the car, and ask when the brake fluid was last changed. Have the ABS warning lamp checked if it stays on.

   2 excerpts from owner complaints in NHTSA records

   “Dt: consumer was driving the car and came to stop sign applied the brakes, they failed and vehicle went through the stop sign. Took vehicle to dealer, they checked the brakes system and found nothing. On the day that the dealer stated nothing was wrong, this happened again. Took back to dealer, left it with the dealer for 5 days. They drove the car 337 miles and found nothing. The next day while driving the brakes were very spongy. Today, took vehicle back to dealer, and it had proper brakes.”

   NHTSA complaint #10122239, filed 2005-05, 10,500 miles

   “Upon applying the brakes there was a loud squeaking sound. Manufacturer was notified, and informed owner that this was the normal characteristic of that vehicle. Consumer was also advised that because of the material the pads are made of, there was nothing they could do. Consumer received a loaner 2003 Century and experienced the same defect with this vehicle. The brakes were previously replaced prior to the consumer purchasing the vehicle. The vehicle experienced vibration while driving. The dealer replaced all four tires.”

   NHTSA complaint #10037905, filed 2003-10, 9,630 miles
3. 3
   Electrical system

   Dashboard and gauge lighting goes dark

   • 7 complaints (6%)
   • median 86,375 mi at 8.1 yrs old (7 state mileage, few)
   • filed 2010–2014

   Owners report the instrument panel lamps turning off when the headlights are switched on, leaving the gauges and speedometer unreadable at night. Some describe the panel lights behaving in reverse, coming on when the headlights are off and going out once the lights are turned on or the car is put in gear. The instrument cluster itself was replaced in some cases, with owners noting the repair cost several hundred dollars; others describe the cluster, radio or clock lights flickering at random. Most complaints fall between roughly 40,000 and 100,000 miles.

   1 related service bulletin

   What to check: At night, turn the headlights on and confirm all gauge and speedometer backlighting works, then check that the panel lights respond correctly when the headlight switch is cycled. Ask whether the cluster or dimmer switch has been serviced.

   2 excerpts from owner complaints in NHTSA records

   “The internal panel lights go off when I turned on the head lights. I could no longer read my gauges or speedometer. The head lights still work but I feel this is the same complaint that many on the internet have complained about with there head lights going off. When will mine stop working? This problem has existed with buicks since 1998 and I consider very dangerous problem. The dealer wants almost 700.00 to replace the dimmer switch the car is a 2003 Buick Century.”

   NHTSA complaint #10365498, filed 2010-11, 86,000 miles

   “Instrument panel lights go out when emergency brake released and car is put in gear. If car in park with engine running and brake engaged lights on panel are on. However, when lights are manually turned on the panel lights go out. When lights manually turned off the lights go on. Once in gear the lights go out again.”

   NHTSA complaint #10365365, filed 2010-11, 86,375 miles
4. 4
   Engine cooling

   Coolant and oil leaks at gaskets

   • 6 complaints (5%)
   • median 53,800 mi at 6.0 yrs old (6 state mileage, few)
   • filed 2007–2015

   Owners describe coolant loss with no obvious puddle, or oil level dropping steadily between changes, and shops tracing it to intake manifold gaskets, manifold bolts or head gaskets. In several cases the dealer recommended a head gasket replacement, and one owner was told maintenance could not be performed because the manifold gasket was leaking oil into the coolant. Reported repair costs ranged from several hundred to over a thousand dollars. Reported from about 30,000 to 90,000 miles, with several around 45,000 to 80,000.

   3 related service bulletins

   What to check: Check the coolant reservoir for oily film or discoloration and look for coolant residue around the intake manifold and head gasket edges. Ask whether manifold or head gaskets have been replaced and review oil change records for steady level changes.

   2 excerpts from owner complaints in NHTSA records

   “Every Buick owner, I have talked to at about 80,000 to 100,000 miles has to replace intake manifold and bolts. This is about a $1200.00 job, gaskets and bolts should last a lot longer.”

   NHTSA complaint #10678391, filed 2015-01, 87,253 miles

   “The contact owns a 2003 Buick Century. Whenever the contact examined the engine she noticed that the oil level would continually drop after having an oil change. The vehicle was taken to the dealership where the contact was informed that the engine manifold was leaking. The current and failure mileages were 46000.”

   NHTSA complaint #10303187, filed 2010-01, 46,000 miles
5. 5
   Body and structure

   Rocker panel and body corrosion

   • 6 complaints (5%)
   • median 72,000 mi at 3.5 yrs old (5 state mileage, few)
   • filed 2003–2012

   Owners describe rust spreading along the rocker panels on both sides, in some cases progressing up toward the doors. One owner was told by a dealer that the panels were beyond repair and advised to trade the vehicle, and a mechanic also noted rusty radiator supports. Other body-related reports mention water leaking at the bottom of the rear doors and a dashboard reflection in the windshield in sunlight. Reported from roughly 70,000 to 130,000 miles, mostly on older vehicles in rust-prone areas.

   1 related service bulletin

   What to check: Inspect the rocker panels and lower door seams from underneath for bubbling or soft metal, and check the radiator support and floor edges. Ask whether the car has spent winters in a road-salt area.

   2 excerpts from owner complaints in NHTSA records

   “Ongoing leaks at bottom of both rear doors for some years despite at least 3 attempts by dealer to fix. I finally resolved on my own with plastic sheeting which is unsightly. Also discovered leak in truck in past year. Another issue is poor quality of the 2 control knobs on dash board for A/C, etc. They have either broken or have been difficult to turn.”

   NHTSA complaint #10269809, filed 2009-05, 12,000 miles

   “The way the dashboard is designed it gives off a reflection of itself onto the windshield. The reflection is more apparent in the sunlight. This results in poor visibility. Manufacturer suggested that consumer cover the dashboard. But, according to owner's manual, sensors on the dashboard should not be covered. The correct model year is 2004, not in artemis.”

   NHTSA complaint #10042154, filed 2003-10, 274 miles

Buying note. Check the headlight and dimmer switch operation carefully at night, since that is the most frequently reported concern, and have a shop look at the brake lines and rocker panels for rust. Records showing gasket, switch or cluster repairs already done are worth asking about, since several owners report repeat repairs to the same parts.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.