MasterPro A4378 Automatic Transmission Mount - Left

Automatic Transmission Mount for Nissan

MasterPro MRC Mounts A4378 is a standard replacement automatic transmission mount built for OE-style fit and function. It uses a steel mount body with a solid rubber bushing and black finish details to support the transmission in the correct position on compatible Nissan applications.

The MasterPro MRC Mounts line focuses on direct replacement parts for everyday repair work. This A4378 mount is made as an OEM replacement and meets or exceeds original equipment manufacturer specifications for the listed vehicles.

Key Features

• Automatic transmission mount, OEM replacement
• Steel mount construction with rubber bushing
• Solid cushion design for stable transmission support
• Standard replacement grade
• 3 mounting holes
• Per vehicle quantity: 1
• Part number: A4378

Detailed Product Information

MasterPro MRC Mounts A4378 is designed for the left-side automatic transmission mount location on select Nissan Sentra, Nissan 200SX, and Nissan NX models. It is a direct-fit replacement for vehicles that need a transmission mount with OE-style dimensions and mounting points. This part cross-references B4378 for the same application.

Compatible With 1991-1994 Nissan Sentra, left; 1995-1998 Nissan 200SX, left; 1991-1993 Nissan NX, left; and 1998-1999 Nissan Sentra, left. If you are replacing a worn Nissan Sentra transmission mount or sourcing an automatic transmission mount for a Nissan 200SX or NX, A4378 provides a straightforward replacement option.

Common Repair Uses

• Replacing a cracked or separated transmission mount
• Restoring proper transmission support on the left side
• Addressing drivetrain movement caused by worn rubber
• Correcting vibration or clunking related to mount wear
• Replacing an OE-style mount during transmission service

Installation Notes

Verify the vehicle year, model, and left-side application before installation. This mount does not include mounting hardware, mounting bracket, heat shield, or instructions. Confirm the mounting hole count and OE-style fitment against the removed part before assembly.

Quality Assurance

This MasterPro MRC Mounts transmission mount is built as a standard replacement part and is stated to meet or exceed original equipment manufacturer specifications for the listed applications.