Dorman 991-000 Differential Drain Plug - Front

Dorman 991-000 Differential Drain Plug

Dorman 991-000 is a differential oil drain plug built to match the fit and function of a missing or damaged original plug on specified vehicles. It is a direct replacement for front differential service on select Lexus applications, including Lexus IS250, IS300, IS350, RC300, RC350, GS300, and GS350 models.

Key Features

• Direct replacement differential drain plug for front differential service
• Steel and aluminum construction with a silver finish
• Magnetic design helps capture ferrous wear particles during service
• Hex head drive with 14 mm hex size for service access
• 24 mm thread diameter with medium thread type
• Designed for a secure seal when replacing a damaged or missing OE plug
• Fits front position applications on select Lexus driveline systems

Detailed Description

This Dorman differential drain plug is engineered for front differential applications where the original plug is worn, missing, or damaged. The magnetic design adds service value by collecting metal debris from differential oil, while the steel and aluminum construction supports dependable fitment in driveline hardware applications. Dorman 991-000 is a practical OE-style replacement for Lexus front differential service, including Lexus IS250, IS300, IS350, RC300, RC350, GS300, and GS350 models. This part cross-references OE part number 9034124016 for the same application.

What It Helps Solve

• Leaking differential drain plug caused by damaged threads or sealing surfaces
• Missing front differential plug after prior service or repair
• Stripped or rounded plug head that prevents proper removal
• Metal contamination in differential oil that can be monitored with a magnetic plug
• Improper fit from a non-matching replacement plug

Installation Notes and Tips

Verify thread diameter, thread type, and hex size before installation. Clean the drain opening and inspect the sealing surface for damage before threading in the plug. Because no gasket or seal is included, confirm the vehicle’s sealing method and replace any worn sealing component as required by the service procedure. Use the correct tool on the 14 mm hex head and tighten to the vehicle manufacturer’s specification.

Quality Assurance

Dorman replacement hardware is built to match original equipment fit and function for specified applications. This part is designed for front differential use on select Lexus vehicles and is engineered to restore proper serviceability when the original plug is no longer usable.