Sensors - Oxygen Sensor <==> O2 or Lambda Sensor):All parts for 1997 AUDIA4
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| Part # | Engine / Misc Description | Part Description | Click to Check Price |
| SG256 | L4 1.8 B AEB | Downstream Sensor Downstream Sensor  | |
| SG197 | L4 1.8 B AEB | Upstream Sensor Upstream Sensor  | |
| SG243 | V6 2.8 A AFC | Downstream Sensor Downstream Sensor, Left Side, Right Side  | |
| SG510 | V6 2.8 A AFC | Upstream Sensor Upstream Sensor, Two required  | |
| SG243 | V6 2.8 A AHA | Downstream Sensor Downstream Sensor, Left Side, Right Side | |
| SG510 | V6 2.8 A AHA | Upstream Sensor Upstream Sensor, Two required | |
