Dorman 090-039 Engine Oil Drain Plug

Dorman 090-039 Oil Drain Plug

Dorman 090-039 is a direct replacement engine oil drain plug for worn or damaged original equipment plugs. It is built to match the original thread pitch and seal profile for a secure oil pan seal on select Nissan applications, including Nissan 510, 720, D21, Sentra, Maxima, 200SX, 280ZX, 210, 310, and 810.

Key Features

• Direct replacement engine oil drain plug for OE-style fitment
• Steel construction with silver finish
• Metric fine-thread design: M16.4-1.33
• 21 mm hex head for standard service tools
• Gasket included for sealing at the oil pan
• Non-magnetic conventional drain plug design
• Fits select Nissan models from 1971-1986
• Part number: 090-039

Detailed Description

This Dorman oil drain plug is engineered for a precise thread match, helping restore proper sealing when the original plug is stripped, rounded, or no longer seats correctly. The steel body, fine metric thread, and included gasket support a dependable oil change service on older Nissan platforms. If you need a replacement oil drain plug for a Nissan 720, D21, or Sentra, Dorman 090-039 provides the correct M16.4 x 1.33 thread specification and 21 mm hex drive for straightforward service.

This part cross-references AMS Automotive 4321 for the same application.

What It Helps Fix

• Oil leaks at the drain plug or oil pan sealing surface
• Stripped or worn drain plug threads
• Rounded hex heads that make removal difficult
• Improper sealing after repeated oil changes
• Replacement needs on select Nissan 510, 280ZX, and Maxima models

Installation Notes and Tips

Verify the thread size, pitch, and head size before installation. Clean the oil pan threads and sealing surface, then install the plug with the included gasket to help achieve a proper seal. Use the correct 21 mm socket and tighten to the vehicle manufacturer’s specification. Dorman 090-039 is a conventional drain plug and does not require a special tool.

Quality Assurance

Dorman manufactures this replacement drain plug to match the original equipment thread pitch and sealing requirements for the listed applications. Part number 090-039 is intended as a direct-fit service replacement for select Nissan vehicles.