HELLA Brake Booster Pressure Sensor

The HELLA Brake Booster Pressure Sensor (Model 233.518-011) is a highly accurate, inline electronic vacuum sensor designed for modern automotive power brake systems. Manufactured in the Czech Republic, this sensor continuously monitors the vacuum level within the brake booster line. It is a critical safety and performance component, especially in vehicles that rely on auxiliary electric vacuum pumps to maintain proper braking force.

Key Specifications:

• Category: Automotive Parts & Accessories / Braking Systems / Brake Sensors & Switches

• Product Type: Brake Booster Vacuum / Pressure Sensor

• Manufacturer: HELLA

• Model / Part Number: 6PP 233 518-011 (Housing marked as 233.518-011)

• Operating Voltage: 5V DC (4.5V to 5.5V range)

• Electrical Connection: 3-Pin angular connector socket (Output Signal, Ground, Supply Voltage)

• Hose Connections: Barbed push-on ports (11mm and 16mm stepped L-Shape/Inline design)

• Housing Material: PA 66 (High-strength Polyamide 66 composite)

• Protection Rating: IP6K9K (Dustproof and withstands high-pressure/high-temp water jets)

• Origin: Made in CZ (Czech Republic)

Key Features:

• Precise Vacuum Monitoring – Accurately measures the vacuum pressure inside the brake booster circuit (down to -1000 hPa) and sends a linear analog voltage signal (0.5V to 4.5V) to the vehicle's ECU to ensure safe braking operation.

• Vacuum Pump Integration – Perfectly complements auxiliary electric brake vacuum pumps (like the HELLA UP28 or UP5.0). It acts as the "brain," signaling the control unit to turn the pump on when the vacuum drops, and off when optimal pressure is restored.

• Severe-Duty Construction – Molded from tough, heat-resistant PA 66 plastic, allowing it to withstand high under-hood temperatures (-40°C to +130°C), chemical exposure, and intense engine vibrations.

• Easy Inline Installation – The stepped dual-barb design allows for a secure, leak-proof, push-fit connection directly into standard automotive pneumatic brake vacuum hoses.

• OEM Reliability – A genuine European-made HELLA component, ensuring strict quality control, highly responsive sensor readings, and long-term durability.

Ideal For:

• Electric Vehicle (EV) conversions utilizing electric power brake systems

• Modern vehicles equipped with start-stop technology or hybrid drivetrains that cannot rely on continuous engine manifold vacuum

• Classic cars and custom Hot Rods that feature aggressive camshafts and require aftermarket vacuum pump management

• Direct OEM replacement for failing brake booster sensors in compatible European vehicles