Question 1

What is the torque spec for o2 sensor - downstream on a 2005-2007 Buick Terraza?

Accepted Answer

The primary torque specification for o2 sensor - downstream on a 2005-2007 Buick Terraza is 55 Nm (40 lb-ft).

Question 2

How many torque specs are there for Buick Terraza o2 sensor - downstream?

Accepted Answer

There are 10 torque specifications for o2 sensor - downstream on the 2005-2007 Buick Terraza 3.5L V6, covering all related fasteners and components.

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

O2 Sensor - Downstream Torque Specifications

Torque Values (10 specifications)