1993-1995 BMW 540i E34 O2 Sensor - Upstream Torque Specs

4.0L V8

Applies to 1993, 1994, and 1995 BMW 540i E34

Labor Time:1.2 hours

Torque Values (10 specifications)

Component	Nm	lb-ft	Notes
⚠️ Flange Bolts	55	40	—
⚠️ Flange Bolts	54	40	Apply anti-seize
Hanger Bolts	23	17	—
Hanger Bolts	23	17	—
Heat Shield Bolts	16	12	—
⚠️ Manifold Nuts	39	29	Apply anti-seize
Mounting Bolts	31	23	—
⚠️ O2 Sensor	55	40	Anti-seize threads
⚠️ O2 Sensor	55	40	—
⚠️ O2 Sensor	54	40	Apply anti-seize to threads

The primary torque specification for o2 sensor - upstream on a 1993-1995 BMW 540i E34 is 55 Nm (40 lb-ft).

There are 10 torque specifications for o2 sensor - upstream on the 1993-1995 BMW 540i E34 4.0L V8, covering all related fasteners and components.