Description
The PAI MSW-4358 is a premium aftermarket rocker-style light switch designed for Mack heavy-duty trucks. This switch is a direct replacement for Mack part number 1MR4294 and features a 3-terminal connector with 12-volt operation. Built by PAI Industries to meet or exceed OEM specifications, it restores reliable lighting control to the dash panel.
Signs You Need a New Light Switch
- Lights flicker or fail to turn on when the switch is toggled
- Switch feels loose, sticks in position, or does not snap between positions
- Intermittent lighting that cuts out over bumps or vibration
- Burning smell or discoloration around the switch connector
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | MSW-4358 |
| Part Type | Rocker Light Switch |
| OEM Reference | Mack 1MR4294 |
| Switch Style | Rocker |
| Terminals | 3 |
| Voltage | 12V |
| Warranty | 2-Year PAI Factory Warranty |
Cross References
This part replaces or is equivalent to the following part numbers:
- Mack: 1MR4294
Applications
This rocker light switch fits select Mack truck models equipped with 3-terminal rocker-style dash switches, including:
- Mack R Model
- Mack RD Model
- Mack RB Model
- Mack DM Model
Verify your dash switch configuration, terminal count, and connector type before ordering to confirm fitment.








