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1991 Buick Roadmaster

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ACDelco AFS21 Oxygen Sensor
for 1991 Buick Roadmaster 5.0L V8 Gas OHV

ACDelco AFS21 Oxygen Sensor - 1991 Buick Roadmaster Image 1
ACDelco AFS21 Oxygen Sensor - 1991 Buick Roadmaster Image 2
ACDelco AFS21 Oxygen Sensor - 1991 Buick Roadmaster Image 3
ACDelco AFS21 Oxygen Sensor - 1991 Buick Roadmaster

ACDelco
Brand:ACDelco
Part Number: AFS21
UPC: 00707773489673
Weight: 0.2 lbs
Condition:New



Availability:
0 in Stock
 OUT OF STOCK

Product Information

Description:

Get the ACDelco AFS21 Oxygen Sensor for your 1991 Buick Roadmaster. Buy now and secure your purchase online!

GM Genuine Parts Oxygen (O2) Sensors are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These sensors are special feedback sensors on your vehicle's exhaust system and measure the proportion of oxygen in exhaust gases. Using this measurement, the engine control module (ECM) can adjust the air/fuel ratio to near the optimal value of 14.7:1. At this ratio, engine performance, emissions, and fuel economy are all optimized. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). ⚠ WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov

Features and Benefits:

  • Detects oxygen content in the exhaust gases to help optimize emissions
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
  • GM regularly updates production and service part designs to integrate new materials and technologies
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)

Specifications:

Connector Gender:
Female
Connector Shape:
Round
Height (in):
3 in
Length (in):
16.91 in
Length (mm):
429.7 mm
Mounting Type:
POSN 1
Programming Required:
No
Sensor Type:
Non Heated
Thread Diameter:
18 mm
Universal Or Specific Fit:
Specific
Weight (lb):
0.2 lb
Width (in):
3 in
Wire Gauge Measurement:
18 Gauge
Wire Quantity:
1
Wiring Harness Length:
343.4 mm
Country of Origin:
US

ACDelco AFS21 Oxygen Sensor compatibility with your 1991 Buick Roadmaster...

Last Updated: 03/02/2024

Years Vehicle Per Vehicle Position Fit NotesFitment Notes

1991

 

1991

 
Buick Roadmaster

5.0L V8 Gas OHV
1
 
Upstream
 
MATING CONN USE 12117385
IN EXH MANIFOLD/CROSSOVER)(TYPE #21
Except LEADED FUEL EMIS EXPORT (NM8)
 

Buick Roadmaster



5.0L V8 Gas OHV

Upstream MATING CONN USE 12117385
IN EXH MANIFOLD/CROSSOVER)(TYPE #21
Except LEADED FUEL EMIS EXPORT (NM8)

1 Per Vehicle

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