Question 1

What is the torque spec for o2 sensor - downstream on a 2006-2011 Buick Lucerne?

Accepted Answer

The primary torque specification for o2 sensor - downstream on a 2006-2011 Buick Lucerne is 60 Nm (44 lb-ft). Note: Apply anti-seize

Question 2

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

Accepted Answer

There are 6 torque specifications for o2 sensor - downstream on the 2006-2011 Buick Lucerne 4.6L V8, covering all related fasteners and components.

Component	Nm	lb-ft	Notes
⚠️ Flange Bolts	60	44	Apply anti-seize
Hanger Bolts	26	19	—
Heat Shield Bolts	16	12	—
⚠️ Manifold Nuts	42	31	Apply anti-seize
Mounting Bolts	34	25	—
⚠️ O2 Sensor	60	44	Apply anti-seize to threads

O2 Sensor - Downstream Torque Specifications

Torque Values (6 specifications)