This Bosch wideband oxygen sensor is a replacement/service part for Holley's Commander 950 wideband controller kits, giving the ECU accurate air/fuel ratio feedback for closed-loop tuning.
Specifications:
- Sensor Type: Lambda Wide Band
- Brand: Bosch
- Mounting Style: Screw-In
- Thread Size: 18mm x 1.5
- Connector Color: Black
- For Use With: Commander 950 Wideband Controller Kits
- Part Number: 534-198
This is a replacement/service part and does not include the Commander 950 controller.
FAQ
What is the 534-198 sensor used for?
It's a replacement Bosch wideband oxygen sensor for Holley Commander 950 wideband controller kits.
What thread size does it use?
It uses an 18mm x 1.5 screw-in thread.
Does it include the wideband controller?
No, this is a replacement/service sensor only — the Commander 950 controller is sold separately.
What connector color does the sensor have?
Black.

