Mobility Solutions

Lightweight and available worldwide Bosch presents new aluminum brake booster

  • Weighs about half as much as traditional brake boosters made from steel
  • Aluminum versions of Bosch Tie Rod 4 vacuum-based brake booster
  • Worldwide production for global vehicle platforms
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  • September 10, 2013
  • Mobility Solutions
  • Press releases

press release

The lighter the vehicle, the less fuel it consumes and the more dynamically it can be driven. In their quest to reduce vehicle weight, automakers and their suppliers are increasingly replacing conventional steel with lighter metals. An example of this is the Bosch Tie Rod 4 vacuum brake booster, which the technology supplier now offers in various aluminum models. “The new aluminum versions of our brake booster are only half as heavy as conventional steel ones,” says Gerhard Steiger, the president of the Bosch Chassis Control Systems division. “Depending on the size, this means a weight saving of up to 1.5 kilos compared to earlier models.” The weight-reduced versions of the Bosch brake booster will feature in three production-vehicle models later this year.

When Bosch engineers introduced the steel Tie Rod 4 in 2011, they had already succeeded in significantly reducing its weight compared to previous models. The new aluminum brake booster from Bosch is now even lighter. It is available as a single model with a 10-inch or 11-inch diameter or as a tandem version with a diameter of 8+8 or 8+9 inches. Other versions are available on request. Although the thickness of the walls has been reduced in the aluminum models, rigidity is ensured by the integrated tension rods. This rigidity is essential for a good pedal feel as well to keep pedal play to a minimum.

A “through-bolt” version is also available, which means that any mounting work can be done exclusively from the engine compartment. As with all Bosch brake boosters, the system is complemented perfectly by the Bosch TMC 8e brake master cylinder. This is 20 percent lighter and 30 percent shorter than its predecessor.

All versions of the Tie Rod 4 can be manufactured worldwide. This means Bosch is able to offer automakers standardized solutions, especially for global vehicle platforms.

Click here to find further information.

At the 65th International Motor Show in Frankfurt, Bosch is showcasing technical solutions for connected mobility. A variety of innovations are helping to make road traffic cleaner and more efficient, as well as safer and more comfortable. Bosch is exhibiting its highlights at booth A04 in hall 8.

Mobility Solutions is the largest Bosch Group business sector. In 2015, its sales came to 41.7 billion euros, or 59 percent of total group sales. This makes the Bosch Group one of the leading automotive suppliers. The Mobility Solutions business sector combines the group’s expertise in three mobility domains – automation, electrification, and connectivity – and offers its customers integrated mobility solutions. Its main areas of activity are injection technology and powertrain peripherals for internal-combustion engines, diverse solutions for powertrain electrification, vehicle safety systems, driver-assistance and automated functions, technology for user-friendly infotainment as well as vehicle-to-vehicle and vehicle-to-infrastructure communication, repair-shop concepts, and technology and services for the automotive aftermarket. Bosch is synonymous with important automotive innovations, such as electronic engine management, the ESP anti-skid system, and common-rail diesel technology.

The Bosch Group is a leading global supplier of technology and services. It employs roughly 375,000 associates worldwide (as of December 31, 2015). The company generated sales of 70.6 billion euros in 2015. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiaries and regional companies in some 60 countries. Including sales and service partners, Bosch’s global manufacturing and sales network covers some 150 countries. The basis for the company’s future growth is its innovative strength. Bosch employs 55,800 associates in research and development at 118 locations across the globe. The Bosch Group’s strategic objective is to deliver innovations for a connected life. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.”

Further information is available online at and,

PI8270 - September 10, 2013

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