2017-2024 Audi A4 O2 Sensor - Downstream Torque Specs

2.0L I4 TFSI

Applies to 2017, 2018, 2019, 2020, 2021, 2022, 2023, and 2024 Audi A4

Labor Time:0.7 hours

Torque Values (18 specifications)

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

The primary torque specification for o2 sensor - downstream on a 2017-2024 Audi A4 is 45 Nm (33 lb-ft). Note: Apply anti-seize

There are 18 torque specifications for o2 sensor - downstream on the 2017-2024 Audi A4 2.0L I4 TFSI, covering all related fasteners and components.