Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1983 BMW 633CSi AutomaticFACTORY OEM SERVICE PROCEDURE
Air Temperature Sensor
Turn ignition switch off. Disconnect electrical connector at air flow meter and connect ohmmeter between terminals 6 and 22. Readings should be as follows. If not, replace temperature sensor and air flow meter as an assembly.
TEMPERATURE/RESISTANCE RELATIONSHIP
| Temperature | Ohms |
|---|---|
| 68°F (20°C) | 2,000-3,000 |
| 122°F (50°C) | 760-970 |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.