Bosch 13847 oxygen sensor for the 2004-2005 Chevrolet Trailblazer 6-cylinder 4.2L and other vehicles measures the air-fuel ratio in the exhaust and reports it to the ECU. This Bosch premium oxygen sensor is a heated, narrow-band switching type for the upstream position, and it helps the ECU hold stable combustion control and keep emissions down.
- Switching-Type narrow-band heated sensor with an advanced ceramic element and optimized heater control
- Reaches operating temperature in less than 10 seconds for quick closed-loop control
- Metal housing, integrated heater element and TSP coating to resist vibration, corrosion and contamination
- Built to withstand exhaust streams up to 1,880°F
Quick facts
- Part: Bosch 13847 oxygen sensor
- Fits: 2004-2005 Chevrolet Trailblazer 6-cylinder 4.2L and other vehicles
- Position: Upstream
- Material: Metal (housing)
- Condition: New
A worn oxygen sensor can show up as a check engine light, rough running or poorer fuel economy. An exhaust leak, a damaged wiring connector or a fuel or ignition fault can be behind these signs too, so find the cause before buying a sensor. Each vehicle takes one upstream sensor, and this listing is one.
Fits
It is listed for a wide range of Chevrolet, GMC, Buick and other models, including the 2004-2005 Chevrolet Trailblazer EXT 6-cylinder 4.2L and the 2004-2005 GMC Envoy 6-cylinder 4.2L.
Specifications
Fit and size
- Position: Upstream
- Quantity per vehicle: 1
- Thread size: M18 - 1.5
- Hex size: 22 mm
- Length (sealing surface to end of connector): 15.7 in
Build and materials
- Sensor type: Narrow-band, heated
- Housing material: Metal
- Condition: New
- Warranty: Bosch 1-year, unlimited-mileage warranty for non-commercial passenger cars and light trucks
In the box
One oxygen sensor with its wiring harness. A mounting bracket is not included.
Installation notes
- Conductive anti-seize is pre-applied on the threads.
- Direct-fit connectors allow quick installation.
Frequently Asked Questions
Is this the Chevy Trailblazer oxygen sensor for a 2004-2005 model with the 6-cylinder 4.2L?
Yes. Bosch 13847 is listed for the 2004-2005 Chevrolet Trailblazer 6-cylinder 4.2L. It is the upstream sensor, and each vehicle takes one.
Does Bosch 13847 work as a GMC Envoy oxygen sensor for a 2004-2005 model with the 6-cylinder 4.2L?
Yes, Bosch 13847 is listed for the 2004-2005 GMC Envoy 6-cylinder 4.2L. If your car is not named here, enter its year, model and engine in the "Vehicles it fits" section.
Does this Bosch O2 sensor come with a wiring harness?
Yes, the wiring harness is included with the sensor. A mounting bracket is not included.
What thread size and wrench size does Bosch 13847 use?
The thread size is M18 - 1.5 and the hex size is 22 mm. Length from the sealing surface to the end of the connector is 15.7 in.
Is anti-seize already on this oxygen sensor's threads?
Yes, conductive anti-seize is pre-applied on the threads, and the connectors are direct-fit for quick installation.
