Bosch Motorsport ABS

Bosch Motorsport ABS brings closed-loop, driver-adjustable anti-lock braking to competition and serious road builds. The current system is the ABS M5 — the same generation of hardware Bosch supplies to professional motorsport — and because it is wheel-speed based and runs independently of the engine ECU, it integrates alongside any engine management system: MoTeC, Emtron, Haltech, or Bosch MS 6. 909 Motorsport is an Authorized Bosch Motorsport Dealer based in Newcastle NSW — we supply, install and support Motorsport ABS across Australia.

Why motorsport ABS is not factory ABS

A production ABS calibration is built for road tyres, road surfaces and liability — it intervenes early and conservatively. The Motorsport ABS M5 is calibrated for racing: it works with slick and semi-slick tyres, aggressive brake packages and real aero loads, and it gives the driver direct control over how hard the system works.

  • 12-position map switch — 11 control settings from most sensitive (heavy rain) through to the most aggressive dry-slick calibration, plus ABS OFF. The driver changes maps from the cockpit as conditions change.
  • Motorsport-grade sensing — four active wheel-speed sensors (DF11), front and rear brake-pressure sensors, and an MM7.10 inertial measurement unit feeding longitudinal, lateral and yaw-rate data into the control loop.
  • Proven hardware — twin-circuit hydraulic unit with two valves per wheel, two high-pressure pumps and twin accumulators; 1,910 grams; rated to 360 km/h; DOT 4 / DOT 5.1 fluid; −30 to 130 °C operating range.
  • Full data and diagnostics — wheel speeds and system status broadcast over CAN for your dash and logger; setup and diagnostics via the MSA Box II interface.

Which ABS M5 kit?

Bosch supplies the M5 as complete kits — hydraulic unit with attached ECU, sensors, map switch, warning lamp, connectors and loom. The choice comes down to the wiring and the car:

  • ABS M5 Standard Kit — the full-specification kit, built around a vehicle-specific wiring loom.
  • ABS M5 Clubsport Kit — identical M5 hardware with a generic harness that suits engine-bay and front-footwell mounting, at a significantly lower price point. The usual choice for club-level and time-attack builds.
  • Porsche Cup kits — plug & play vehicle-specific derivatives for the 997 Cup, 991 Cup Gen 1 and 991 Cup Gen 2, developed and tested at circuits including Spa and the Nordschleife.
  • 909 vehicle-specific integration kits — our own M5 integration packages for specific platforms, replacing the factory ABS unit with the full motorsport system.

Not sure which fits your build? Talk to us — matching the kit, sensors and install hardware to the car is the part we do every week.

Works with any engine ECU — including MoTeC

The ABS M5 operates independently of engine management. It reads wheel speeds, brake pressures and chassis motion directly, so it works as a standalone braking system regardless of what runs the engine — MoTeC, Emtron, Haltech or Bosch. Neither MoTeC nor Emtron make a motorsport ABS, so builds on those platforms run the Bosch unit alongside their existing electronics. CAN integration with your dash and logger is part of our install.

Master cylinders matter

Motorsport ABS pumps fluid back into the master cylinders during every control event, exposing the cylinder seals to pressure pulsation they never see in a non-ABS system. Bosch's ABS M5 documentation requires frequent master cylinder inspection for this reason, and both AP Racing and Tilton publish advisories that conventional racing master cylinders with cut-off ports can suffer seal damage under ABS operation. Tilton's 79-Series and AP Racing's centre-valve cylinders are designed for ABS use. If you're pairing an ABS kit with a pedal box, ask us to confirm the master cylinder spec before you order — it affects both safety and ABS performance.

Supplied, installed and supported by 909

We're an Authorized Bosch Motorsport Dealer, and Motorsport ABS is the system we know best — supplied, installed and supported on cars competing at World Time Attack outright level. An install covers hydraulic integration, master-cylinder compatibility, wheel-speed sensor mounting, CAN integration with your dash and logging, and commissioning with the MSA Box II. We stock the supporting hardware — sensors, connectors, mounting plates, map switches and warning lamps — as individual parts.

Frequently asked questions

Does Bosch Motorsport ABS work with my ECU?

Yes. The system is wheel-speed based and fully independent of engine management, so it runs alongside any ECU — MoTeC, Emtron, Haltech, Bosch or factory. It broadcasts its data over CAN for your dash and logger.

Is motorsport ABS legal for my category?

That depends on your category's technical regulations — some permit ABS freely, some prohibit it, some restrict it to specific classes. Check your regs first; we can help interpret the electronics side.

What's the difference between the Standard and Clubsport kits?

The M5 hardware is identical. The Standard kit is built around a vehicle-specific loom; the Clubsport kit uses a generic harness that fits engine-bay and front-footwell mounting locations, which is what brings its price down.

Can I install it myself?

A competent race-car builder can — the kits are complete and documented. The parts that benefit from experience are the hydraulic layout, master-cylinder selection and commissioning. We support both routes: full install in our Newcastle workshop, or parts supply with guidance.

What maintenance does the ABS M5 need?

Brake-fluid changes and bleeding on the intervals in the Bosch documentation, master-cylinder inspection per the note above, and general inspection of sensors and wiring. Diagnostics run through the MSA Box II.

Genuine Bosch Motorsport systems from an Authorized Dealer — shop ABS kits, browse ABS hardware, or get in touch to spec your build.