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1985 Pontiac Bonneville

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1985 Bonneville.

The 1985 Pontiac Bonneville carries a 4-quart oil capacity requiring 10W-30 or 5W-30 viscosity and posts a remarkably sparse reliability record of just two owner complaints—centered on seat belts—and a single recall. When set against the model’s subsequent 1990–2005 complaint history, which spans from a low of 27 to a high of 299 annual grievances, this model year registers minimal documented friction. That paucity of reports positions the 1985 example at the quietest end of the Bonneville’s longitudinal reliability spectrum, suggesting a year largely free of the systemic noise that characterizes later iterations.

Model year2005 2004 2003 2002 2001 2000 1999 1998 1985

Quick specs

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

Engine oil capacity4 qtOEM · verified

Engine oil type10W-30 / 5W-30OEM · verified

Fitment & sizes

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

From the factory this vehicle uses OE oil filter 12708762. Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known.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.

OE service part numbers OEM · verified

Engine oil filter	12708762 alt 12731175
Engine air filter	06484235 alt 06419892
Fuel filter	5651803 discontinued
Spark plug	19354415 alt 19354430
Front wiper blades	15184702
Serpentine belt	00469595 alt 09433725
Thermostat	10207373 alt 10105135

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length	200.4 in
Overall width	71.7 in
Overall height	55.9 in
Wheelbase	108.3 in
Curb weight	3241 lb
Weight distribution (front / rear)	56/44

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

Independent road tests for the Bonneville of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

7.1 sec0–60 mph (tested)quickest 7.10 sec — 1995 SE Sedan

Year	Trim / engine	0–60	¼ mile	HP	Drivetrain
1995	SE Sedan 3.8L Supercharger V6	7.10 sec	15.40 sec	225 hp	FWD

Service quick specs OEM factory data

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

This engine holds 4 qt of 10W-30 / 5W-30 engine oil, 80W-90 · GL-5 in the differential.

Lubricants & capacities

Differential Gear Oil	80W-90 · GL-5
Differential Gear Oil Capacity	3.5 qt
Engine Coolant	ETHYLENE GLYCOL
Engine Oil	10W-30 · 5W-30
Engine Oil Capacity	4 qt
Engine Oil	10W-30 · 5W-30
Engine Oil Capacity	4 qt
Power Steering Fluid	USE GM PART NO. 1050017 OR EQUIVALENT

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter at 7,500 mi.

At 7,500 mi	Carburetor Mounting Fasteners (inspect) · Choke System (inspect) · Drive Axle Assembly (drain & refill) · Engine Oil Filter (replace)
Every 7,500 mi	Body Latches, Locks & Hinges (inspect) · Brake System (inspect) · Differential (inspect fluid level) · Engine Oil (drain & refill) · Exhaust System (Complete) (inspect) · Parking Brake Cable (lubricate)
Every 15,000 mi	Engine Oil Filter (replace)
Every 30,000 mi	Accessory Drive Belt (inspect) · Choke System (inspect) · Distributor Cap (inspect) · Distributor Vacuum Advance (inspect) · EGR System (inspect) · Engine Air Filter Element (replace)
Every 100,000 mi	Transmission Fluid & Filter (replace)

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 provided federal record begins in 1990, meaning the target year of 1985 falls entirely outside the available year-by-year trend data, making a direct comparison to adjacent years impossible. The generation's documented complaint arc spans 1990 to 2005, with complaints starting at 44 in 1990, peaking at 299 in 1998, and tapering off to 27 by 2005. For the 1985 target year specifically, the federal data notes only 2 complaints, both related to Seat Belts, alongside zero crash and zero fire complaints. Because the data does not specify the root cause of these seat belt complaints and lacks broader contextual trend data for 1985, the overall risk profile appears minimal based strictly on the limited available figures. Given the extremely low complaint volume and the complete absence of severe incident data, 1985 appears to be a safe year to buy, provided a standard pre-purchase inspection accounts for the vehicle's age.

Open recalls

NHTSA campaigns

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

0 involved a crash · 0 a fire

Owner complaints by model year NHTSA · this generation & adjacent

’90 ’91 ’92 ’94 ’95 ’96 ’97 ’98 ’99 ’00 ’01 ’02 ’03 ’04 ’05

Owner complaints filed with NHTSA, by component

All 2 complaints on record, top 1 components.

Seat Belts2

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

07E088000EquipmentReported 24/10/2007

CERTAIN HONEYWELL FRAM RACING BRAND HP4 AND HP8 OIL FILTERS THAT WERE MANUFACTURED FROM MAY 25, 2006, THROUGH SEPTEMBER 14, 2007, AND SOLD FOR USE AS REPLACEMENT EQUIPMENT FOR VEHICLES LIST ABOVE. THE AFFECTED FILTERS… Remedy: HONEYWELL WILL REPLACE THE AFFECTED OIL FILTERS FREE OF CHARGE. THE RECALL BEGAN DURING NOVEMBER 2007. OWNERS CAN CONTACT FRAM CUSTOMER SERVICE TOLL-FREE AT 1-800-890-2075.

Technical service bulletins NHTSA · verified

Showing 1 of 1 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
85-7-27	1985-06-01	Power Train	UNKNOWN

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 Bonneville. 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.

Vehicles taking 4 qt Engine oil filter 12708762 Engine air filter 06484235 Fuel filter 5651803 Spark plug 19354415

Reference guides

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

Vehicle recalls & TSBs OBD-II trouble codes Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 1985 Bonneville take?

4 qt of ABOVE 40 degrees F: 30, ABOVE 0 degrees F: 10W-30, BELOW 60 degrees F: 5W-30, per the factory manual.

Does the 1985 Bonneville have open recalls?

NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.