Limited Availability! Factory Oxygen Sensor Mounting Nut, 86-89 300ZX (Z31) All

Limited Availability: Nissan has discontinued production these mounting nuts. Additionally, our importers have not been able to acquire more of them in some time. We recently located a very limited supply of these mounting nuts for the smaller oxygen sensors found on late 300ZX-Z31 models. Availability is limited to our remaining inventory on hand (until we locate another source). If you know that you need this arm for your car, don't delay or you might miss your chance!

Includes:

• (1) Oxygen Sensor Mounting Nut

Description:
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; 1 required per car.

Application Notes:
84-89 models used two different size nuts, depending on the year. Early models (84-85) normally require the larger inner diameter nut (14-3480) while later models use this smaller inner diameter nut. Some aftermarket sensors and aftermarket Air/Fuel sensors for performance gauges or tuning kits may require the larger inner diameter nut instead. Additionally, a very limited number of other late 1980's Nissan applications also use this mounting nut. Check your car prior to ordering.

Sizing Notes:

• M24 x 1.5mm - Outer Threads (To Manifold)
• M12 x 1.25mm - Inner Threads (Sensor)
• 1.25" (~32mm) - Socket/Wrench Size for Nut Removal

Header Notes:
MSA 300ZX (Z31) headers for 86-89 models 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.

Model Guide:
Nissan 300ZX

Code Guide:
Nissan Z31

Year Guide:
1986, 1987, 1988, 1989

Some parts may not fit every version of every year listed. See product Title & Description for any application breakdowns or customization options, and contact us with any questions.

• 1986 Nissan 300ZX-Z31
• 1987 Nissan 300ZX-Z31
• 1988 Nissan 300ZX-Z31
• 1989 Nissan 300ZX-Z31