Replace your failed transmission control module with an OEM 1998-1999 Mazda Millenia 2.3L TCM, programmed to your vehicle before it ships.

This module is a direct replacement for units carrying part number K1J7-18-9E1B. Every unit is refurbished, bench-tested against OEM specification, and flashed with the latest manufacturer software.

Confirm it is the TCM before you buy

Harsh or erratic shifting, limp mode, or a transmission stuck in one gear are commonly blamed on mechanical failure, and people pay for a rebuild that was never needed. Before committing to that, have the module checked. Codes in the P0700 to P0799 range point at the transmission control system, and a complete loss of communication with the TCM on a scan tool is strong evidence the module itself has failed.

What a TCM actually does

The transmission control module manages shift timing, line pressure and torque converter lockup. It works alongside the engine computer, reading the brake pedal position sensor, throttle position, turbine speed sensor and transmission fluid temperature to decide when and how firmly to shift.

No core charge, and no core to send back

There is no core charge on this module, no deposit and nothing to return. Keep your old unit, and your lifetime warranty starts the day it ships.

What you receive

• Programmed to your vehicle before dispatch, so it installs plug and play
• Bench-tested by our technicians before it leaves us
• Lifetime warranty for as long as you own the vehicle
• Free US shipping, typically delivered in 2-4 business days
• No core charge, no core return required

Common symptoms of a failed TCM

• Harsh, delayed or erratic gear changes
• Transmission stuck in one gear, often third, known as limp mode
• Shifting at the wrong speeds or hunting between gears
• P0700 to P0799 transmission control codes
• No communication with the module on a scan tool

Before you order

Enter your 17-character VIN at checkout. If unsure, call 516-494-7838 and a technician will confirm fitment.