Standard Ignition BST156 Power Brake Booster Vacuum Sensor

Power Brake Booster Vacuum Sensor for Audi and Volkswagen

Standard Ignition BST156 is a power brake booster vacuum sensor built for direct replacement on select Audi and Volkswagen applications. It uses a bolt-on attachment, a female oval plug-in connector, and a 4-blade male terminal layout for a straightforward OE-style connection.

Compatible With Audi R8, A6 Quattro, S5, Q7, A4, A4 Quattro, RS4, S4, RS6, and A6, plus Volkswagen Passat applications listed below. Standard Ignition BST156 is also cross-referenced to 036906051C and BBST156 for the same application.

Key Features

• Power brake booster vacuum sensor for brake system vacuum monitoring
• Bolt-on mounting for secure installation
• Black finish
• Female oval connector with plug-in design
• 4 male blade terminals
• Direct-fit replacement for select Audi and Volkswagen vehicles

Detailed Description

This sensor is used in brake booster vacuum monitoring systems to help the vehicle control module read vacuum conditions at the power brake booster. Standard Ignition BST156 is built with one connector, an oval plug-in interface, and blade-style terminals to match the original electrical connection on supported vehicles. It is a practical replacement choice for Audi A4 and A4 Quattro models, Audi A6 and A6 Quattro applications, and other listed platforms where the brake system uses this sensor design.

Fits 2008-2012 Audi R8, N/A; Fits 2005-2011 Audi A6 Quattro, N/A; Fits 1998-2002 Audi A6 Quattro, N/A; Fits 2008-2011 Audi S5, N/A; Fits 2007-2010 Audi Q7, N/A; Fits 1999-2009 Audi A4, N/A; Fits 1999-2009 Audi A4 Quattro, N/A; Fits 2007-2008 Audi RS4, N/A; Fits 2004-2008 Audi S4, N/A; Fits 2000-2001 Audi S4, N/A; Fits 2001-2005 Volkswagen Passat, N/A; Fits 2003 Audi RS6, N/A; Fits 1998-2001 Audi A6, N/A.

What It Helps Solve

• Brake warning lights related to booster vacuum sensing
• Incorrect vacuum signal readings from a failing sensor
• Brake assist concerns caused by sensor electrical faults
• Connector or terminal mismatch during sensor replacement
• Vacuum monitoring issues on supported Audi and Volkswagen brake systems

Installation Notes and Tips

Verify connector shape, terminal count, and mounting style before installation. This part installs with a bolt-on method and uses a female oval plug-in connector with 4 male blade terminals, so matching the original sensor configuration is important for proper fitment. Confirm the vehicle application by year, make, and model before ordering.

Quality Assurance

Standard Ignition supplies OE-style replacement electrical components for brake and sensor applications. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.