Factory maintenance schedule OEM · verified
Normal service, condensed from the factory interval matrix.
| Every 30,000 mi | Oxygen Sensor (replace) |
Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1985 735i.
The 1985 BMW 735i represents a distinct chapter in the marque's flagship sedan lineage, its engine specified with a 6.1-quart oil capacity and API SJ viscosities of 15W-40, 10W-40, or 10W-30. Reliability data for this specific year reflects a notably trouble-free profile, marked by only two owner complaints—centered on the seats—and a single recall. When positioned against the broader model's 1990-1995 complaint history, which peaked at six complaints in 1992 and hit a low of one in 1995, the 1985 model year sits at the highly reliable end of the spectrum, indicating a fundamentally robust iteration for researchers to evaluate.
Fluid capacities, tune-up values and fuel economy at a glance.
0–60 mph, quarter-mile, horsepower and torque from independent road tests.
Independent road tests for the 735i of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.
| Year | Trim / engine | 0–60 | ¼ mile | HP | Drivetrain |
|---|---|---|---|---|---|
| 1988 | Sedan 3.4L I-6 | 9.10 sec | 16.80 sec | 208 hp | RWD |
Capacities, torques and tune-up values from the factory service manual.
This engine holds 6.1 qt of 15W-40 / 10W-40 / 10W-30 API SJ engine oil, DOT 4 brake fluid.
| Brake Fluid | DOT 4 |
| Differential Gear Oil Capacity | 4 Pints |
| Engine Coolant | ETHYLENE GLYCOL |
| Engine Oil | 15W-40 · API · 10W-40 · 10W-30 · 5W-30 |
| Engine Oil Capacity | 6.1 qt |
| Power Steering Fluid | ATF |
Normal service, condensed from the factory interval matrix.
| Every 30,000 mi | Oxygen Sensor (replace) |
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
The provided year-by-year federal record covers 1990 through 1995 and does not contain entries for 1985, so a direct comparison to immediately adjacent model years is not supported by the data. Within that documented span, complaints and recalls rise to a peak of six complaints and three recalls in 1992 before falling to zero complaints in 1993 and 1994 and minimal activity by 1995. For the 1985 target year itself, the record shows complaints in two areas—seats and tires—with one complaint each, alongside zero crash and zero fire complaints, which is below the 1990–1992 peak but above the minimal 1993–1995 levels shown. Because 1985 sits outside the provided year-by-year arc, the data does not specify its place in that trend, though the absence of crash or fire complaints and the minimal overall count suggest limited federally documented risk relative to the 1990–1992 peak. Consequently, the 1985 model appears favorable from a federal-record standpoint compared with those later peak years, making it a comparatively good year to buy provided a thorough pre-purchase inspection confirms the individual vehicle’s condition.
All 2 complaints on record, top 2 components.
Source: NHTSA Office of Defects Investigation complaint database.
Showing 1 of 1 campaigns on record for this vehicle.
INCORRECT MACHINING OF THE SEATING SURFACE OF THE WHEELS WHERE IT CONTACTS THE HUB OF THE CAR MAY PREVENT THE WHEELS FROM MOUNTING SECURELY TO THE HUB. THIS MAY CAUSE THE WHEEL TO BREAK AND COULD FALL OFF. CONSEQUENCE… Remedy: SCRAPE THE CENTER BORE OF THE RIM SO IT CAN CLEAR THE CENTER OF THE HUB.
Showing 1 of 1 bulletins on record with NHTSA.
| Bulletin | Date | Component | Summary |
|---|---|---|---|
| B510819 | 2024-01-16 | Electrical System | The basic conditions for initializing the power windows are not met. |
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
Decode factory build data for a specific vehicle by VIN.
Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.
Cross-vehicle references for the kinds of data on this page.
6.1 qt of HIGH PERFORMANCE MINERAL OILS: ABOVE 5 degrees F: 15W-40 API SJ, SL OR SM, -5 degreesF TO 68 degrees F: 10W-40 API SJ, SL OR SM, 5 degreesF TO 50 degrees F: 10W-30 API SJ, SL OR SM, BELOW 50 degrees F: 5W-30 API SJ, SL OR SM, BELOW 32 degrees F:, per the factory manual.
NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.