2002-2009 Mazda B4000 O2 Sensor - Upstream Torque Specs

4.0L V6

Applies to 2002, 2003, 2004, 2005, 2006, 2007, 2008, and 2009 Mazda B4000

Labor Time:0.5 hours

🔧 Torque Values5 specifications

Component	lb-ft	Nm	Notes
⚠️ Flange Bolts	40	55	—
Hanger Bolts	17	23	—
Mounting Bolts	23	31	—
⚠️ O2 Sensor	40	55	Anti-seize threads
⚠️ O2 Sensor	40	55	—

⚠️ = 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 2002-2009 Mazda B4000 is 55 Nm (40 lb-ft).

There are 5 torque specifications for o2 sensor - upstream on the 2002-2009 Mazda B4000 4.0L V6, covering all related fasteners and components.