Question 1

What is the torque spec for o2 sensor - upstream on a 2002-2010 Lexus SC 430?

Accepted Answer

The primary torque specification for o2 sensor - upstream on a 2002-2010 Lexus SC 430 is 45 Nm (33 lb-ft). Note: Apply anti-seize

Question 2

How many torque specs are there for Lexus SC 430 o2 sensor - upstream?

Accepted Answer

There are 6 torque specifications for o2 sensor - upstream on the 2002-2010 Lexus SC 430 4.3L V8, covering all related fasteners and components.

Component	Nm	lb-ft	Notes
⚠️ Exhaust Flange Bolts	45	33	Apply anti-seize
⚠️ Flange Bolts	47	35	—
Hanger Bolts	20	15	—
Heat Shield Bolts	10	7	—
Mounting Bolts	27	20	—
⚠️ O2 Sensor	45	33	Apply anti-seize to threads only

O2 Sensor - Upstream Torque Specifications

Torque Values (6 specifications)