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Bosch’s brake-by-wire system replaces the mechanical connection between the brake pedal and braking system with electrical signals, while still using hydraulic pressure at the wheels. Its announced hydraulic design includes two separate braking devices and redundant electrical channels. Bosch reported a public-road test and planned an early-2026 vehicle application, but as of October 4, 2026, the cited sources do not confirm that application entered production.
What brake-by-wire means
In a conventional arrangement, a mechanical connection transmits force from the brake pedal into the braking system. With brake-by-wire, the pedal’s request is sent electrically instead. Bosch describes this as part of its broader act-by-wire approach, in which electrical signal lines replace the mechanical link between a driver control and an actuator. Bosch says its by-wire systems use redundancy in logic, power supply and communication: Bosch Mobility’s act-by-wire overview.
That does not mean the hydraulic version eliminates hydraulics. The system Bosch described in its 2025 announcements still generates hydraulic pressure at the wheel brakes; the key change is how the driver’s braking request reaches the devices that generate that pressure.
How Bosch’s hydraulic system is designed
Bosch describes two braking devices: a by-wire brake actuator and an electronic stability program (ESP) system. The pedal request travels over redundant electrical signal lines to the two devices, which operate on separate channels. Bosch says either device can independently build the required pressure at all four wheel brakes if the other channel has a fault. Further details are in Bosch’s account of its brake-by-wire test vehicle and its Japan announcement.
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Bosch is also developing a purely electromechanical brake-by-wire system. That is a distinct architecture; the production application discussed in the cited announcements concerns the hydraulic system, not a purely electromechanical one.
What redundancy says—and does not say—about safety
The stated fault-response design is the central safety feature: two devices on separate channels are intended to provide independent pressure generation at all four wheels. Bosch says this makes the system suitable for highly automated vehicles, where braking must remain available even if a channel has a fault.
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Those are Bosch’s descriptions and claims, not an independent safety evaluation. The cited material does not provide a complete safety case, certification details, independent fault-injection results or a quantified comparison with other braking architectures. Bosch also reported obtaining approvals in several countries for its test vehicle based on a safety concept; that is a company-reported development milestone, not proof of fleet-wide durability or independent validation.
Why automakers may consider the architecture
Removing the mechanical pedal-to-system connection can give manufacturers more freedom in locating brake components, including moving them away from the firewall. Bosch says this flexibility may help with crash-safety optimization, noise, vibration and harshness (NVH), manufacturing, pedal travel and interior design; it also says it could reduce the need for separate left- and right-hand-drive variants. These are design opportunities described by Bosch, not quantified outcomes. The cited sources do not establish resulting savings in cost or weight, improved crash outcomes, injury reduction or a measured increase in cabin space.
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Brake-by-wire is one of several possible system layouts, rather than a single replacement architecture for every vehicle. Bosch Engineering lists these alternatives:
| Architecture | What the source establishes |
|---|---|
| iBooster plus ESP | Listed by Bosch Engineering as a braking-system architecture; comparative performance and price are not stated. |
| Decoupled power brake plus ESP | Listed by Bosch Engineering as a braking-system architecture; comparative performance and price are not stated. |
| By-wire actuator plus ESP | The hydraulic brake-by-wire arrangement described in Bosch’s 2025 announcements; Bosch describes separate channels and independent pressure generation in a fault scenario. |
| Integrated power brake | Listed by Bosch Engineering as a braking-system architecture; comparative performance and price are not stated. |
The available comparison is architectural, not a controlled head-to-head test. For a vehicle program, the relevant questions include fault response and redundancy, packaging constraints, integration with the vehicle, and the platform’s automation needs. Bosch Engineering’s braking-systems overview names the alternatives but does not provide a common set of comparative test results or prices.
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Road testing, forecast and production status
Bosch said its hydraulic brake-by-wire test vehicle completed its first public-road trip in January 2025: more than 3,300 kilometers across different climate zones on a route to the Arctic Circle. This is a Bosch-reported development test, not an independent durability study.
In 2025, Bosch forecast that more than 5.5 million vehicles worldwide would be equipped with brake-by-wire by 2030. That figure is Bosch’s forecast, not a measured installed base or an independent market estimate.
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A Bosch Japan announcement associated with the 2025 Japan Mobility Show said the hydraulic system was expected in production vehicles for an unnamed Asian automaker in early 2026. The cited material does not confirm that the planned application entered production, name the automaker or identify a production model. Current production volumes and installed fleet figures are likewise not established by these sources. The system is discussed as an OEM vehicle-platform technology; the cited evidence does not establish a consumer retrofit or direct retail purchase.
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