1997-1999 Audi A8 Quattro O2 Sensor - Upstream Torque Specs

3.7L V8

Applies to 1997, 1998, and 1999 Audi A8 Quattro

Labor Time:0.7 hours

🔧 Torque Values5 specifications

Component	lb-ft	Nm	Notes
⚠️ Flange Bolts	35	47	—
Hanger Bolts	15	20	—
Mounting Bolts	20	27	—
⚠️ O2 Sensor	35	47	Anti-seize threads
⚠️ O2 Sensor	35	47	—

⚠️ = Critical torque value | Always verify with vehicle-specific service manual

⚠️ Some critical specs are estimated. Please verify sequence.

1990-1997 4.6L V8 Modular

2007-2012 3.7L I5

2011-2016 6.7L V8 Power Stroke Diesel

1992-1995 1.5L I4 D15

2016-2023 2.0L Turbo I4

1995-1999 2.0L Turbo I4

The primary torque specification for o2 sensor - upstream on a 1997-1999 Audi A8 Quattro is 47 Nm (35 lb-ft).

There are 5 torque specifications for o2 sensor - upstream on the 1997-1999 Audi A8 Quattro 3.7L V8, covering all related fasteners and components.