Factory Oxygen Sensor Mounting Nut, 79-83 280ZX N/T, 84-85 300ZX All, 90-96 300ZX All
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- (1) Oxygen Sensor Mounting Nut
Most Z-Cars that require an Oxygen Sensor use a specialized mounting nut for installation. The O2 sensor mounts into the nut, which then threads into the exhaust manifold (or the rear elbow on the turbocharger). Sometimes the original nut can be reused, but more often than not we find them damaged from improper removal/installation or rusted beyond repair. This is the genuine, original equipment (OEM) mounting nut. Sold individually.
- 79-80 280ZX models only came with an O2 Sensor on California Emissions models. Federal models started including them in 1981. 280ZX Turbo models do not require a mounting nut.
- 84-89 models used two different size nuts, depending on the year. Late models (86-89) normally require the smaller inner diameter nut (14-3481); however, some aftermarket sensors require this larger inner diameter nut. Some aftermarket Air/Fuel sensors for performance gauges or tuning kits may also require this nut instead of the smaller one. Check your kit prior to ordering.
- 1996 models saw the addition of rear O2 sensors; however, these do not require mounting nuts.
MSA headers for 280ZX and 84-85 300ZX models do not require the mounting nut. The sensor will fit directly into the header instead. MSA 86-89 300ZX headers DO require one of the mounting nuts. Nissan used a non-standard size O2 sensor for late Z31 models, so we sized the port for these years to accept the nut to allow customization as needed (see above note). For non-MSA headers, we recommend visual inspection to determine whether you need the mounting nut or not.
- 79-83 N/T: 1
- 84-85: 1
- 90-96: 2
Datsun 280ZX, Nissan 300ZX
Datsun S130, Nissan Z31, Z32
1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986*, 1987*, 1988*, 1989*, 1990, 1991, 1992, 1993, 1994, 1995, 1996
Attention California Customers:
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.