Dorman 090-040CD Engine Oil Drain Plug - Left or Right

Dorman 090-040CD Engine Oil Drain Plug

Dorman 090-040CD is a direct replacement engine oil drain plug for worn or damaged original equipment plugs. It is built to match the original thread pitch for a secure seal and reliable oil service on a wide range of applications, including Subaru WRX STI, Subaru Outback, and Porsche 911 models.

Key Features

• Direct replacement oil drain plug for engine oil service
• Metric M20x1.5 thread size with 17 mm hex head
• Carbon steel construction with silver finish
• Flanged hex design for conventional drain service
• Gasket included for sealing at the drain point
• Fits applications that use a 0.5 in shank length and 6-point socket access

Product Details

This Dorman oil drain plug is engineered for direct OE-style replacement where the original plug is stripped, damaged, or no longer sealing properly. The metric M20x1.5 thread pitch helps maintain proper engagement in the oil pan or crankcase, while the included gasket supports a tight seal during routine oil changes. Part number 090-040CD is listed across many Subaru, Porsche, Honda, Chevrolet, and Isuzu applications, including Subaru WRX STI, Subaru Forester, and Porsche 928 fitments.

This part cross-references Monroe Shocks & Struts (e.g., 032510, 652216) for the same application.

What It Helps Fix

• Stripped or worn drain plug threads
• Oil seepage at the drain plug sealing surface
• Damaged hex head that makes removal difficult
• Incorrect thread pitch from a previous replacement
• Routine oil service on vehicles using an M20x1.5 drain plug

Installation Notes and Tips

Verify thread size, pitch, and head size before installation. This plug uses a 17 mm hex head and conventional drain method, so standard hand tools are typically sufficient. Clean the sealing surface before installing the new gasket, and tighten to the vehicle manufacturer’s specified torque to avoid over-tightening. Confirm fitment for the exact vehicle and engine configuration, especially on Porsche 911, Subaru WRX STI, and Subaru Outback applications.

Quality Assurance

Dorman manufactures this replacement drain plug as a direct-fit hardware solution for OE-style service. The carbon steel body, metric thread specification, and included gasket support consistent sealing performance during oil changes.