Brand new OEM SR20DET O2 Sensor for S13 . These are OEM Nissan NTK O2 sensor. Changing out your old sensor to a new one usually would improve gas mileage. For S13 models, there's 2 type of O2 sensors. There is the Large (FAT) (blacktop) and Small (Skinny) (Redtop) type, both have 3 wires. Images shown above are for the skinny Redtop type. Either model will work on the engines, the only difference is the thread size.
Vehicle Applications
| Year | Make | Model | Trim | App Notes |
| 1989 - 1993 | Nissan | 180SX | (S13) L4 2.0L SR20DET | None |
| 1989 - 1993 | Nissan | Silvia | (S13) L4 2.0L SR20DET | None |
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