How to Replace a Heated Oxygen Sensor (HO2S) 1 on 2003 Chevrolet Impala?

The first step for replacing the heated Oxygen Sensor (HO2S) 1 involves disconnecting its electrical connector. The hot mounting procedure becomes challenging at engine temperatures under 48°c (120°F) since the use of excessive force could potentially ruin the Exhaust Manifold threads. The heated Oxygen Sensor wrench (J 39194-B) should be used to take out the ho2s 1. Before installing the new or serviced ho2s 1, apply anti-seize compound gm p/n 12377953 or its equivalent to the sensor threads because this special anti-seize compound which contains graphite and glass beads works best for threads. The sensor threads require anti-seize compound during reinstallation. Apply anti-seize compound to ho2s 1 threads and install the sensor before tightening it to 41 n.m (30 lb ft) with the heated Oxygen Sensor wrench (J 39194-B). Finally, reconnect the ho2s 1 electrical connector.

OEM 2003 Chevrolet Impala Oxygen Sensor

Oxygen O2 Sensor

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

3 Oxygen Sensors found

View related parts
2003 Chevrolet Impala Oxygen Sensor
Part Number: 19178747
$83.90 MSRP: $151.86
You Save: $67.96 (45%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors
- Replaced by: 19355307
- Item Weight: 0.60 Pounds
- Item Dimensions: 8.1 x 2.1 x 2.3 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 19178747
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2003 Chevrolet Impala Submodels:
- Base, LS, LS Sport, Police, SS | 6 Cyl 3.4 L GAS, 6 Cyl 3.8 L GAS
View related parts
2003 Chevrolet Impala Oxygen Sensor
Part Number: 19178958
$64.36 MSRP: $130.72
You Save: $66.36 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor; Manifold
- Replaces: 25178022, 25312203, 25312211, 25164488
- Item Weight: 0.60 Pounds
- Item Dimensions: 8.0 x 2.1 x 2.4 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 19178958
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2003 Chevrolet Impala Submodels:
- Base, LS, LS Sport, Police | 6 Cyl 3.4 L GAS, 6 Cyl 3.8 L GAS
View related parts
2003 Chevrolet Impala Oxygen Sensor
Part Number: 12559850
$58.78 MSRP: $119.40
You Save: $60.62 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor
- Item Weight: 0.50 Pounds
- Item Dimensions: 8.4 x 3.3 x 3.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12559850
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2003 Chevrolet Impala Submodels:
- Base | 6 Cyl 3.4 L GAS

2003 Chevrolet Impala Oxygen Sensor

With a comprehensive array of OEM 2003 Chevrolet Impala Oxygen Sensor, from fuel pumps to door handles, our website is a one-stop-shop for your needs. All our genuine 2003 Chevrolet Impala Oxygen Sensor are backed by the manufacturer's warranty and are offered at competitive prices in the market. Rest assured, you can shop with complete confidence.

2003 Chevrolet Impala Parts Questions & Experts Answers

Q: How to Replace a Heated Oxygen Sensor (HO2S) 1 on 2003 Chevrolet Impala?
A: The first step for replacing the heated Oxygen Sensor (HO2S) 1 involves disconnecting its electrical connector. The hot mounting procedure becomes challenging at engine temperatures under 48°c (120°F) since the use of excessive force could potentially ruin the Exhaust Manifold threads. The heated Oxygen Sensor wrench (J 39194-B) should be used to take out the ho2s 1. Before installing the new or serviced ho2s 1, apply anti-seize compound gm p/n 12377953 or its equivalent to the sensor threads because this special anti-seize compound which contains graphite and glass beads works best for threads. The sensor threads require anti-seize compound during reinstallation. Apply anti-seize compound to ho2s 1 threads and install the sensor before tightening it to 41 n.m (30 lb ft) with the heated Oxygen Sensor wrench (J 39194-B). Finally, reconnect the ho2s 1 electrical connector.

Related 2003 Chevrolet Impala Parts

Alternate Year Models

2002 Chevrolet Impala Oxygen Sensor 2004 Chevrolet Impala Oxygen Sensor