AC DELCO AFS109 [HEATED OXYGEN SENSOR]

This AC DELCO Oxygen Sensor is a new part. It is the same piece that you would receive if you purchased it from your local GM dealer.

This Oxygen O2 Sensor has the following specifications:

  • Rectangular, Four pin, 4 wire connector
  • Replaces dealer part numbers: 19178958, 25164488, 25312203, AFS109
  • Direct Fit
  • Correct Connector No cutting or splicing
  • Built and tested to strict quality control standards
  • Some applications use (2) of the same Oxygen Sensors

Note: For clarification purposes:

  • Upstream location is between the catalytic converter and the engine
  • Downstream location is between the catalytic converter and the tailpipe

A direct replacement. If you have a bad O2 sensor causing your vehicle to idle poorly or fail an emission test then this is the part for you.

 

Our electrical and electronic parts are subject to strict quality control testing.  Once the item has been installed or plugged in, it is no longer eligible for a refund.  The item may be eligible for replacement, only if it is found to have a manufacturing defect. Before purchasing, please ensure proper diagnosis of the failed original part is performed

 

Note:  You may be required to reset the vehicle’s computer after installation of this part.

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Removing the O2 Sensor (0:37)
    • Pry out the clip and pin from the sensor
    • Disconnect the O2 sensor harness
    • Cut off the harness connector and sensor with wire cutters
    • Remove the O2 sensor wire with a 7/8 wrench
  2. step : Installing the New O2 Sensor (2:20)
    • Twist on the O2 sensor to the exhaust pipe
    • Tighten the O2 sensor with a 7/8 wrench
    • Reconnect the O2 sensor harness
    • Replace the pin and re-clip the harness to the vehicle

Tools needed for replacement:

    Pliers, Cutters & misc Wrenches

  • Wire Cutters

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Wrenches - SAE

  • 7/8 Inch Wrench

5.0 / 5.0
1 Review
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Worked great.no more check engine light.running smoother and better gas milage...
August 8, 2017
Purchased
11 months ago
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Vehicle Fit

  • 1997-1999 Buick Century V6 3.1L (8th Vin Digit M) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 2000 Buick Century V6 3.1L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997 Buick LeSabre V6 3.8L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1998-2002 Buick LeSabre V6 3.8L (8th Vin Digit K) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-2003 Buick Park Avenue V6 3.8L (8th Vin Digit K) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-2003 Buick Park Avenue V6 3.8L (8th Vin Digit 1) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-2002 Buick Regal V6 3.8L (8th Vin Digit 1) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-2002 Buick Regal V6 3.8L (8th Vin Digit K) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1999 Buick Riviera V6 3.8L (8th Vin Digit 1) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997 Buick Riviera V6 3.8L (8th Vin Digit K) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997 Buick Skylark V6 3.1L (8th Vin Digit M) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Cadillac Deville V8 4.6L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Cadillac Eldorado V8 4.6L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1999-2000 Cadillac Escalade V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2002 Cadillac Escalade V8 5.3L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2002 Cadillac Escalade V8 6.0L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2002 Cadillac Escalade EXT V8 6.0L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996 Cadillac Seville V8 4.6L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1999 Cadillac Seville V8 4.6L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1997 Chevy Astro V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2002 Chevy Avalanche 1500 V8 5.3L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Chevy C1500 Truck V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Chevy C1500 Truck V8 5.0L (8th Vin Digit M) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1998 Chevy C1500 Truck V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Chevy C2500 Truck V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1998 Chevy C2500 Truck V8 5.0L (8th Vin Digit M) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 Chevy C2500 Truck V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000 Chevy C2500 Truck V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 Chevy C3500 Truck V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 Chevy C3500 Truck V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-2002 Chevy Camaro V6 3.8L (8th Vin Digit K) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1998-2000 Chevy Camaro V6 3.8L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2002 Chevy Express 1500 Van V8 5.0L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2002 Chevy Express 1500 Van V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2002 Chevy Express 1500 Van V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1998 Chevy Express 1500 Van V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1998 Chevy Express 1500 Van V8 5.0L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2002 Chevy Express 2500 Van V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2002 Chevy Express 2500 Van V8 5.0L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2002 Chevy Express 2500 Van V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1998 Chevy Express 2500 Van V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1998 Chevy Express 2500 Van V8 5.0L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 Chevy Express 3500 Van V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2002 Chevy Express 3500 Van V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000 Chevy Impala V6 3.4L (8th Vin Digit E) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 2000-2003 Chevy Impala V6 3.8L (8th Vin Digit K) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Chevy K1500 Truck V8 5.0L (8th Vin Digit M) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Chevy K1500 Truck V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1998 Chevy K1500 Truck V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 Chevy K2500 Truck V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 Chevy K2500 Truck V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1998 Chevy K2500 Truck V8 5.0L (8th Vin Digit M) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 Chevy K3500 Truck V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 Chevy K3500 Truck V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1997 Chevy Lumina V6 3.4L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1999 Chevy Lumina V6 3.1L (8th Vin Digit M) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1998-1999 Chevy Lumina V6 3.8L (8th Vin Digit K) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 2000-2001 Chevy Lumina V6 3.1L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1999 Chevy Malibu V6 3.1L (8th Vin Digit M) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1999-2000 Chevy Malibu V6 3.1L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1999 Chevy Monte Carlo V6 3.1L (8th Vin Digit M) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997 Chevy Monte Carlo V6 3.4L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1998-2003 Chevy Monte Carlo V6 3.8L (8th Vin Digit K) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 2000 Chevy Monte Carlo V6 3.4L (8th Vin Digit E) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1999-2002 Chevy Silverado 1500 V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1999 Chevy Silverado 1500 V8 5.3L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1999 Chevy Silverado 1500 V8 4.8L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000-2002 Chevy Silverado 1500 V8 5.3L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000-2002 Chevy Silverado 1500 V8 4.8L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2001 Chevy Silverado 1500 V8 6.0L Downstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 2002 Chevy Silverado 1500 V6 4.3L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2002 Chevy Silverado 1500 V8 5.3L (Canada Built Models (1st VIN Digit 2)) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2001 Chevy Silverado 1500 HD V8 6.0L Downstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 1999 Chevy Silverado 2500 V8 5.3L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000 Chevy Silverado 2500 V8 5.3L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000-2001 Chevy Silverado 2500 V8 6.0L Downstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 2001 Chevy Silverado 2500 V8 6.0L Downstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 2001 Chevy Silverado 2500 HD V8 6.0L Downstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 2001 Chevy Silverado 3500 V8 6.0L Downstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 2000-2002 Chevy Suburban 1500 V8 5.3L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2002 Chevy Suburban 1500 V8 5.3L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000-2001 Chevy Suburban 2500 V8 6.0L Downstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 1996-1999 Chevy Suburban C1500 V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Chevy Suburban C2500 V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Chevy Suburban C2500 V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Chevy Suburban K1500 V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Chevy Suburban K2500 V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Chevy Suburban K2500 V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 Chevy Tahoe V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000-2002 Chevy Tahoe V8 4.8L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000-2002 Chevy Tahoe V8 5.3L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2002 Chevy Tahoe V8 5.3L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Chevy Van - P Series Forward Control P30 V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996 Chevy Van - P Series Forward Control P30 V8 5.7L (8th Vin Digit K) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Chevy Van - P Series Forward Control P30 V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1997 Chevy Van - P Series Forward Control P30 V8 7.4L (8th Vin Digit N) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1997 Chevy Van - P Series Forward Control V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1998-1999 Chevy Van - P Series Forward Control P30 V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1998-1999 Chevy Van - P Series Forward Control P30 V8 7.4L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996 Chevy Van G-Series G30 V8 7.4L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996 Chevy Van G-Series G30 V8 5.7L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996 Chevy Van G-Series G30 V6 4.3L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-2000 Chevy Venture V6 3.4L (8th Vin Digit E) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1998 GMC C1500 Truck V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 GMC C1500 Truck V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 GMC C1500 Truck V8 5.0L (8th Vin Digit M) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 GMC C2500 Truck V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 GMC C2500 Truck V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1998 GMC C2500 Truck V8 5.0L (8th Vin Digit M) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 GMC C3500 Truck V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 GMC C3500 Truck V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1998 GMC K1500 Truck V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 GMC K1500 Truck V8 5.0L (8th Vin Digit M) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 GMC K1500 Truck V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1998 GMC K2500 Truck V8 5.0L (8th Vin Digit M) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 GMC K2500 Truck V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 GMC K2500 Truck V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 GMC K3500 Truck V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 GMC K3500 Truck V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1997 GMC Safari V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2002 GMC Savana 1500 Van V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2002 GMC Savana 1500 Van V8 5.0L (8th Vin Digit M) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2002 GMC Savana 1500 Van V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2002 GMC Savana 2500 Van V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2002 GMC Savana 2500 Van V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2002 GMC Savana 2500 Van V8 5.0L (8th Vin Digit M) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2002 GMC Savana 3500 Van V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-2000 GMC Savana 3500 Van V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1997 GMC Savana 3500 Van V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1999-2002 GMC Sierra 1500 V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1999 GMC Sierra 1500 V8 4.8L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1999 GMC Sierra 1500 V8 5.3L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000-2002 GMC Sierra 1500 V8 4.8L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2001 GMC Sierra 1500 V8 6.0L Downstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 2001 GMC Sierra 1500 C3 V8 6.0L Downstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 2002 GMC Sierra 1500 V8 5.3L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2002 GMC Sierra 1500 V6 4.3L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2001 GMC Sierra 1500 HD V8 6.0L Downstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 2001 GMC Sierra 1500 HD C3 V8 6.0L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1999 GMC Sierra 2500 V8 5.3L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000 GMC Sierra 2500 V8 5.3L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000 GMC Sierra 2500 V8 6.0L Upstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 2001 GMC Sierra 2500 V8 6.0L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2001 GMC Sierra 2500 V8 6.0L Downstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 2001 GMC Sierra 2500 HD V8 6.0L Downstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 2001 GMC Sierra 2500 HD V8 6.0L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2001 GMC Sierra 3500 V8 6.0L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 GMC Suburban C1500 V8 5.7L Automatic Transmission Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 GMC Suburban C2500 V8 5.7L Automatic Transmission Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 GMC Suburban C2500 V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 GMC Suburban K2500 V8 5.7L Automatic Transmission Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 GMC Suburban K2500 V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996 GMC Van G3500 V6 4.3L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996 GMC Van G3500 V8 7.4L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996 GMC Van G3500 V8 5.7L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996 GMC Van - P Series Forward Control P3500 V8 5.7L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 GMC Van - P Series Forward Control P3500 V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1997 GMC Van - P Series Forward Control P3500 V8 7.4L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 GMC Van - P Series Forward Control P3500 V6 4.3L (8th Vin Digit W) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1998-1999 GMC Van - P Series Forward Control P3500 V8 7.4L (8th Vin Digit J) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1998-1999 GMC Van - P Series Forward Control P3500 V8 7.4L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 GMC Yukon V8 5.7L with 4L80E 4 Speed Automatic Transmission Downstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 GMC Yukon V8 5.7L with 4L60E 4 Speed Automatic Transmission Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000 GMC Yukon V8 5.7L (8th Vin Digit R) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000 GMC Yukon V8 4.8L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2001 GMC Yukon V8 6.0L Downstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 2001-2002 GMC Yukon V8 5.3L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2001-2002 GMC Yukon V8 4.8L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2002 GMC Yukon V8 5.3L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2002 GMC Yukon V8 6.0L Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2001-2002 GMC Yukon XL 1500 V8 5.3L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2002 GMC Yukon XL 1500 V8 5.3L (US Built Models) Downstream O2 Oxygen Sensor ACDelco AFS109
  • 2000-2001 GMC Yukon XL 2500 V8 6.0L Downstream O2 Oxygen Sensor Passenger Side ACDelco AFS109
  • 1997-1999 Olds 88 V6 3.8L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1998 Olds Achieva V6 3.1L (8th Vin Digit M) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1999-2001 Olds Alero V6 3.4L (8th Vin Digit E) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1996-1999 Olds Aurora V8 4.0L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1999 Olds Cutlass V6 3.1L (8th Vin Digit M) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1999 Olds Cutlass V6 3.1L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997 Olds Cutlass Supreme V6 3.1L (8th Vin Digit M) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1998 Olds Intrigue V6 3.8L (8th Vin Digit K) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1999 Olds Intrigue V6 3.5L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1999 Olds Intrigue V6 3.8L (8th Vin Digit K) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1999 Olds LSS V6 3.8L (8th Vin Digit K) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1999 Olds LSS V6 3.8L (8th Vin Digit 1) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1998 Olds Regency V6 3.8L (8th Vin Digit K) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-2000 Olds Silhouette V6 3.4L (8th Vin Digit E) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 2001-2002 Olds Silhouette V6 3.4L Automatic Transmission (excluding California Emissions) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-2003 Pontiac Bonneville V6 3.8L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-2002 Pontiac Firebird V6 3.8L (8th Vin Digit K) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1998 Pontiac Grand Am V6 3.1L (8th Vin Digit M) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1999-2000 Pontiac Grand Am V6 3.4L (8th Vin Digit E) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-2003 Pontiac Grand Prix V6 3.8L (8th Vin Digit K) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-2003 Pontiac Grand Prix V6 3.8L (8th Vin Digit 1) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1999 Pontiac Grand Prix V6 3.1L (8th Vin Digit M) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 2000 Pontiac Grand Prix V6 3.1L Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1999-2000 Pontiac Montana V6 3.4L (8th Vin Digit E) Upstream O2 Oxygen Sensor ACDelco AFS109
  • 1997-1998 Pontiac Trans Sport V6 3.4L (8th Vin Digit E) Upstream O2 Oxygen Sensor ACDelco AFS109

This part replaces:

  • ACDelco AFS109
  • OE # 19178958
Only 2 left in stock
Part #: 1AACD00051

AC DELCO
Brand #: AFS109

How-to Video:

(03:02 min)