Braking SystemsModel S has an anti-lock braking system
(ABS) that prevents the wheels from locking
when you apply maximum brake pressure. This improves steering control during heavy
braking in most road conditions.
During emergency braking conditions, the
ABS constantly monitors the speed of each
wheel and varies the brake pressure according
to the grip available.
The alteration of brake pressure can be felt as
a pulsing sensation through the brake pedal.
This demonstrates that the ABS is operating
and is not a cause for concern. Keep firm and
steady pressure on the brake pedal while
experiencing the pulsing.The ABS indicator flashes briefly on
the instrument panel when you first
start Model S. If this indicator lights
up at any other time, an ABS fault
has occurred and the ABS is not
operating. Contact Tesla. The
braking system remains fully
operational and is not affected by an
ABS failure. However, braking
distances may increase.If the instrument panel displays this
indicator at any time other than
displaying briefly when you first start
Model S, a brake system fault is
detected or the brake fluid level is
low. Contact Tesla immediately.Emergency Braking
In an emergency, fully press the brake pedal
and maintain firm pressure, even on low
traction surfaces. The ABS varies the braking pressure to each wheel according to the
amount of traction available. This prevents wheels from locking and ensures that you
stop as safely as possible.Warning: Do not pump the brake pedal.
Doing so interrupts operation of the ABS
and can increase braking distance.Warning: Always maintain a safe distance
from the vehicle in front of you and be aware of hazardous driving conditions.
While the ABS can improve stopping
distance, it cannot overcome the laws of physics. It also does not prevent the
danger of hydroplaning (where a layer of
water prevents direct contact between
the tires and the road).
Brake Wear
Model S brake pads are equipped with wearindicators. A wear indicator is a thin metalstrip attached to the brake pad that squeals as
it rubs against the rotor when the pad wears
down. This squealing sound indicates that the
brake pads have reached the end of their
service life and require replacement. To stop
the squealing, contact Tesla Service.
Warning: Neglecting to replace worn
brake pads results in damage to the
braking system and can create a braking
hazard.
Brakes
58Model S Owner's Manual
Brakes
Type
4-wheel anti-lock braking system (ABS)with Electronic Brake Force Distribution,
Integrated Advanced Stability Control
and Electronic Accelerator pedal actuated
regenerative braking systemCalipersFour piston fixedRotor Diameters (ventilated)Front: 13.98”/355 mm
Rear: 14.37”/365 mmFront Rotor thicknessNew: 1.26”/32 mm
Service limit: 1.18”/30 mmRear Rotor thicknessNew: 1.10”/28 mm
Service limit: 1.02”/26 mmFront Brake Pad Thickness (excluding back plate)New: 0.354”/9.0 mm
Service limit: 0.078”/2 mmRear Brake Pad Thickness (excluding back plate)New: 0.315”/8.0 mm
Service limit: 0.078”/2 mmElectronic Parking Brake (EPB) Pad Thickness
(excluding back plate). Electronic calipers self-
adjust for pad wear.New: 0.216”/5.5 mm
Service limit: 0.039”/1 mmParking brakeElectrically actuated parking brake
calipers
Suspension
FrontIndependent, double wishbone, air spring
or coil spring/telescopic damper, sway barRearIndependent, multi-link, air spring or coil
spring/telescopic damper, sway bar (air suspension vehicles only)For alignment values, see Wheel Alignment Values on page 135.
Battery - 12V
Rating33 amp-hr or higherVoltage and Polarity12V negative (-) ground
Subsystems
Specifications133
