Bosch 901-613-115-01 Brake Light Switch for Master Cylinder

The Bosch 901-613-115-01 is a genuine OEM brake light switch designed to mount directly on the brake master cylinder. This high-quality electrical component activates the vehicle's brake warning light system when brake fluid pressure differentials are detected between the front and rear brake circuits.

Key Features:

• Two-pole electrical connection design for dual-circuit brake systems
• Mounts directly into the brake master cylinder assembly
• Genuine Bosch OEM quality for reliable performance
• Detects hydraulic pressure imbalances to trigger brake warning lights
• Precision-engineered threads for secure, leak-free installation

This brake warning light switch is commonly used on classic European vehicles with dual-circuit brake systems. The two-pole design monitors brake hydraulic pressure and alerts the driver to potential brake system failures by illuminating the dashboard warning light when pressure differences occur between brake circuits.