BuickCentury2002Overview/buick/century/2002/base/

2002 Buick Century

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2002 Century.

Body PASSENGER CARTransmission Automatic 4-spd

The 2002 Buick Century is a passenger car equipped with an automatic 4-speed transmission and EPA-rated fuel economy of 18 mpg city, 26 mpg highway, and 21 mpg combined. Routine service calls for 4.5 quarts of 5W-30 API engine oil, a straightforward spec that fits the model's practical character. Within the 1990–2005 Century complaint record, the 2002 model logged 166 owner complaints and two recalls, with Engine & Engine Cooling cited as the top problem area — placing it below the 1999 peak of 252 complaints but well above the 2005 low of 19, which marks it as a middle-of-the-pack year rather than either the most troubled or the most settled of the run.

Model year200520042003200220012000199919981997

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity4.5 qtOEM · verified
Engine oil type5W-30 APIOEM · verified
Lug nut torque100 ft-lbsOEM · verified
EPA fuel economy18/26/21 mpgEPA · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 78 · 600 CCA battery, OE oil filter 12731175. Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 78 · 600 CCAOEM · verified

OE service part numbers OEM · verified

Engine oil filter12731175
Engine air filter15221217
Fuel filter25121293 discontinued
Spark plug12681664
Battery88866305 alt 88866121
Front wiper blades19120758
Serpentine belt12588410
Thermostat24507563 alt 10226107
Cabin air filter84557894

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 4-spd

Dimensions & weight NHTSA vPIC

Overall length194.5 in
Overall width72.8 in
Overall height56.7 in
Wheelbase109.1 in
Curb weight3369 lb
Track (front / rear)62.2 / 61 in
Weight distribution (front / rear)64/36

Ratings & economy EPA / vPIC

EPA city / highway / combined18 / 26 / 21 mpg
DrivetrainFront-Wheel Drive
Passenger volume102 cu ft
Cargo volume17 cu ft
Recommended fuelRegular Gasoline

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 4.5 qt of 5W-30 API engine oil. Torque lug nuts to 100 ft-lbs, the oil drain plug to 18.0 ft-lbs. The firing order is 1-2-3-4-5-6.

Lubricants & capacities

Engine Oil5W-30 · API
Engine Oil Capacity4.5 qt

Engine torques

Crankshaft Pulley and/or Damper Bolts76 ft-lbs
Exhaust Manifold to Cylinder Head Bolts12 ft-lbs
Engine Oil Pan Drain Plug18.0 ft-lbs
Engine Valve Cover Bolts8.9 ft-lbs

Chassis torques

Lug Nuts100 ft-lbs
Front Wheel Hub118 ft-lbs

Ignition

Cylinder Firing Order1-2-3-4-5-6
Ignition Coil Secondary Resistance5,000-8,000 ohms
Spark Plug ManufacturerAC Delco
Spark Plug TypeAC 41-940
Spark Plug Gap0.060 in
Spark Plug Torque11.0 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity2.20 lbs
Oil GroupPAG
Oil Type46
Oil Capacity9.00 oz
Standard BCI Group Number78
Standard BCI Cranking Performance600 cca

Service checks

Pressure Test16; Pressure should not exceed 20 psi.
Radiator Cap Pressure Relief16 psi
Thermostat Opening Temperature188-206 °F
Fuel Pump Pressure Minimum52.0 psi
Key ON Engine OFF (KOEO)52-59
RPM42-56 @ Idle rpm
Injector Primary Resistance11-14 @ 70 degreesF ohms
Engine Compression100

Brakes

Torque Caliper to Bracket133 ft-lbs / 32 ft-lbs
Torque to Knuckle100 ft-lbs / 8 ft-lbs
Minimum Pad ThicknessFront: 0.030; Rear: 0.030 specification
Rotor Max Parallel Variation0.001 in
Rotor Runout Limit0.002 in
Rotor Nominal Thickness From1.27 in / 0.43 in
Rotor Nominal Thickness To1.27 in / 0.43 in
Rotor Minimum Machining1.224 in / 0.39 in

Multi-step torque procedures OEM · verified

Cylinder Head — tightening sequence 2 stages
144 ft. lbs.44 ft. lbs
2turn 95

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the spark plugs every 100,000 mi; coolant at 150,000 mi. The big-interval services (at 150,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 7,500 miTire & Wheel Assembly (rotate)
Every 15,000 miCabin Air Filter (replace)
Every 30,000 miEngine Air Filter Element (replace)
Every 60,000 miAccessory Drive Belt (inspect)
Every 100,000 miSpark Plug Wires (inspect) · Spark Plugs (replace) · Transmission Fluid & Filter (replace)
At 150,000 miEngine Coolant System (drain, flush & refill)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

The federal record shows that complaints for the Buick Century rose sharply in the mid‑1990s, peaked around 19982000, and then began a downward trend after 2001. Recall numbers fluctuated over the same period but were generally higher in the late 1990s and early 2000s before settling at lower levels. In the target year 2002, the vehicle logged 166 complaints, 2 recalls, 0 investigations, and 396 TSBs, placing complaint volume slightly above the 2001 figure of 153 but well below the 2000 peak of 219, while recall counts were lower than the 2001 total of 5 and comparable to the 2003 total of 2. Compared with adjacent years, 2002 reflects a modest uptick in complaints from 2001 yet continues the overall decline seen after the 2000 high, with recall activity remaining low. Consequently, the 2002 Buick Century occupies a relatively favorable point in the generation’s complaint and recall trajectory, suggesting it is a reasonable choice for a used‑car purchase.

2
Open recalls
NHTSA campaigns
396
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
166
Owner complaints
9 involved a crash · 4 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Rollover★★★★
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 166 complaints on record, top 8 components.

Engine & Engine Cooling22
Exterior Lighting19
Electrical System18
Visibility18
Service Brakes, Hydraulic12
Air Bags9
Structure6
Service Brakes4

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 2 campaigns on record for this vehicle.

09E005000SteeringReported 17/02/2009

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… Remedy: DORMAN WILL NOTIFY OWNERS AND REPLACE THE DEFECTIVE STEERING KNUCKLES FREE OF CHARGE AND REIMBURSE THE REPAIR FACILITY OR OWNER FOR LABOR. THE RECALL BEGAN ON FEBRUARY 23, 2009…

07E021000Fuel System, Other:Storage:Tank Assembly:Pressure Relief DevicesReported 12/03/2007

CERTAIN DELPHI FUEL PRESSURE REGULATORS, P/NOS. FP10020-11B1, FP10026-11B1, AND FP10027-11B1, SOLD AFTER JANUARY 9, 2007, AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES LISTED ABOVE. THE UNIVERSAL PRESSURE… Remedy: DELPHI WILL NOTIFY OWNERS AND REPLACE THE UPR FREE OF CHARGE. THE RECALL BEGAN ON APRIL 23, 2007. OWNERS CAN CONTACT DELPHI AT 877-411-8770.

Technical service bulletins NHTSA · verified

Showing 5 of 396 bulletins on record with NHTSA.

BulletinDateComponentSummary
PIP5601C2025-07-18Unknown Or OtherThis PI communicates the requirement to provide a pico file to receive diagnostic…
PIP5358D2025-02-19Unknown Or OtherThis Preliminary Information communication provides information to the technician about…
PIP4723J2024-10-25Electrical SystemThis Preliminary Information communicates to the dealer the process for downloading or…
PIT5099H2024-09-12Unknown Or OtherThis Preliminary Information communication provides information to the technician about…
PIT5099H2024-09-12Unknown Or OtherThis Preliminary Information communication provides information to the technician about…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific Century. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Reference guides

Cross-vehicle references for the kinds of data on this page.

Frequently asked

How much oil does the 2002 Century take?

4.5 qt of 5W-30 API, per the factory manual.

Does the 2002 Century have open recalls?

NHTSA lists 2 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the Century get?

EPA figures are 18 city / 26 highway / 21 combined mpg.