Factory maintenance schedule OEM · verified
Normal service, condensed from the factory interval matrix.
| Every 50,000 mi | Oxygen Sensor (replace) |
Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1989 635CSi.
The 1989 BMW 635CSi in automatic-equipped form pairs a four-speed automatic transmission with EPA ratings of 14 mpg city, 18 mpg highway, and 15 mpg combined, while routine oil service calls for 5.3 quarts of 15W-40, 10W-40, or 10W-30 API SJ oil. In the reliability record captured here, the model year shows a minimal complaint footprint: only one owner complaint has been logged, with air bags flagged as the top area, and no recalls on file. That sparse record makes the 1989 635CSi a useful reference point for researchers, though the single air-bag report remains the one noted concern in an otherwise quiet campaign history.
Fluid capacities, tune-up values and fuel economy at a glance.
Engine, drivetrain, dimensions and economy.
| Transmission | Automatic 4-spd |
| EPA city / highway / combined | 14 / 18 / 15 mpg |
| Drivetrain | Rear-Wheel Drive |
| Recommended fuel | Regular Gasoline |
0–60 mph, quarter-mile, horsepower and torque from independent road tests.
Independent road tests for the 635CSi 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 |
|---|---|---|---|---|---|
| 1986 | Coupe 3.4L I-6 | 8.30 sec | 16.30 sec | 182 hp | RWD |
| 1985 | Coupe 3.4L I-6 | 8.20 sec | 16.00 sec | 182 hp | RWD |
Capacities, torques and tune-up values from the factory service manual.
This engine holds 5.3 qt of 15W-40 / 10W-40 / 10W-30 API SJ engine oil, GL-5 in the differential, DOT 4 brake fluid.
| Brake Fluid | DOT 4 |
| Differential Gear Oil | GL-5 |
| Differential Gear Oil Capacity | 4 Pints |
| Engine Coolant | ETHYLENE GLYCOL |
| Engine Oil | 15W-40 · API · 10W-40 · 10W-30 · 5W-30 · 5W-20 |
| Engine Oil Capacity | 5.3 qt |
| Power Steering Fluid | ATF |
Normal service, condensed from the factory interval matrix.
| Every 50,000 mi | Oxygen Sensor (replace) |
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
Owner complaints about the 1989 BMW 635CSi dominate in one area — the air bags, 1 of 1 reports (100%), well ahead of the next concern. NHTSA has issued no recalls for this vehicle, so these are owner-reported concerns only. 0 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the air bags pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.
All 1 complaints on record, top 1 components.
Source: NHTSA Office of Defects Investigation complaint database.
No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.
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.
5.3 qt of ABOVE 5 degrees F: 15W-40 API SJ, SL OR SM, -5 degrees F TO 68 degrees F: 10W-40 API SJ, SL OR SM, -5 degrees F 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: 5W-20 API SJ, SL OR SM, per the factory manual.
NHTSA lists 0 recall campaign(s) for this model year. Check your specific vehicle by VIN.
EPA figures are 14 city / 18 highway / 15 combined mpg.