Question 1

What is the torque spec for o2 sensor - upstream on a 2012-2013 Chevrolet Impala?

Accepted Answer

The primary torque specification for o2 sensor - upstream on a 2012-2013 Chevrolet Impala is 45 Nm (33 lb-ft). Note: Apply anti-seize

Question 2

How many torque specs are there for Chevrolet Impala o2 sensor - upstream?

Accepted Answer

There are 6 torque specifications for o2 sensor - upstream on the 2012-2013 Chevrolet Impala 3.6L V6, covering all related fasteners and components.

Component	Nm	lb-ft	Notes
⚠️ Exhaust Flange Bolts	45	33	Apply anti-seize
⚠️ Flange Bolts	55	40	—
Hanger Bolts	23	17	—
Heat Shield Bolts	10	7	—
Mounting Bolts	31	23	—
⚠️ O2 Sensor	45	33	Apply anti-seize to threads only

2012-2013 Chevrolet Impala O2 Sensor - Upstream Torque Specs

Torque Values (6 specifications)