Question 1

What is the torque spec for o2 sensor - downstream on a 2017-2024 Subaru Impreza?

Accepted Answer

The primary torque specification for o2 sensor - downstream on a 2017-2024 Subaru Impreza is 45 Nm (33 lb-ft). Note: Apply anti-seize

Question 2

How many torque specs are there for Subaru Impreza o2 sensor - downstream?

Accepted Answer

There are 7 torque specifications for o2 sensor - downstream on the 2017-2024 Subaru Impreza 2.0L H4, covering all related fasteners and components.

Component	Nm	lb-ft	Notes
⚠️ Exhaust Flange Bolts	45	33	Apply anti-seize
⚠️ Flange Bolts	47	35	Apply anti-seize
Hanger Bolts	20	15	—
Heat Shield Bolts	10	7	—
⚠️ Manifold Nuts	34	25	Apply anti-seize
Mounting Bolts	27	20	—
⚠️ O2 Sensor	45	33	Apply anti-seize to threads only

2017-2024 Subaru Impreza O2 Sensor - Downstream Torque Specs

Torque Values (7 specifications)