Genuine Start/Stop Engine Start Button for Mazda 2, Mazda 3, CX-5 2017-2024 BJS7663S0

Genuine Start/Stop Engine Switch for Mazda 2, Mazda 3, CX-5 2017–2024, BJS7663S0 is an important part of Mazda's smart start system. This product allows the driver to start or stop the engine with the push of a button, completely replacing the traditional mechanical key and bringing convenience and a modern feel to everyday use.

In addition to the starting function, the Start/Stop switch also serves as the signal link between the smart key and the engine control unit (ECU), ensuring the vehicle only starts when it receives the correct valid signal, helping improve anti-theft protection and vehicle safety.

With long-term use, the Start/Stop switch may experience unresponsive buttons, slow response, or no signal due to worn internal contacts or electrical circuit faults. When this happens, the vehicle may be difficult to start, require repeated presses, or fail to start.

The BJS7663S0 product is manufactured to Mazda's genuine standards, ensuring high sensitivity, good durability, and stable operation in a variety of environmental conditions. This part is compatible with Mazda 2, Mazda 3 and CX-5 models from 2017–2024, with a direct-fit installation and no modification required.

Product Information

• Product name: Start/Stop Engine Switch
• Part number: BJS7663S0
• Standard: Genuine Mazda
• Applicable models: Mazda 2, Mazda 3, CX-5 2017–2024
• System: Smart Start System
• Installation location: Dashboard area / start button
• Condition: New

Functions and Role

• Start and stop the engine with a button
• Connect the smart key system and ECU
• Increase convenience for the vehicle
• Support the smart anti-theft system
• Replace the traditional mechanical lock

Key Benefits

• Genuine Mazda part, high durability
• Fast response, good sensitivity
• Direct-fit design, easy to install
• Stable long-term operation
• Fully compatible with the vehicle electrical system

Signs It Needs Replacing

• Pressing the button has no response
• The car only starts after pressing multiple times
• The vehicle will not start even though the smart key works normally
• The button is loose or mechanically stuck
• Intermittent signal

👉 The Start/Stop switch often fails due to worn contacts, dirt, or electrical circuit faults after long-term use.

Replacement Recommendations

• Check the smart key before replacing
• Disconnect the power when installing
• Install in the correct position to avoid misaligned connector pins
• Recheck the entire starting system after replacement