Aston Martin DBX 2021 Brake Warnings User Manual
Brake Warnings
Warning: If either brake warning symbol comes ON, you should immediately be prepared for increased stopping distances or partial failure of the braking system.
If the brake warning symbol 
comes ON while driving, the brake system has a fault and braking performance may be affected.
If the brake warning symbol 
comes ON while driving:
- The brake booster system has a fault and braking performance may be affected.
- The brake fluid level is insufficient.
A message will also show in the instrument cluster window with further information.
Stop as soon as possible in a safe and convenient place. Apply the footbrake and make sure that the park brake is fully released. If the warning symbol stays ON, do not drive the vehicle. It is essential that the brake system is checked immediately. Contact the nearest Aston Martin Dealer.
ABS Warnings
Warning: If the ABS warning symbol comes ON, you should be aware that wheels could lock during extreme braking or when braking on slippery surfaces.
ABS is monitored for correct operation while the ignition is ON.
If a fault is detected, the will come ON and the ABS will be either partly or fully OFF. Normal braking will continue to function without ABS.
In the event of an ABS fault, have the braking and ABS systems checked immediately by an Aston Martin Dealer.
ABS and Electronic Stability Program (ESP) Warnings
Warning: If the ABS and ESP warning symbols come ON, you should be aware that wheels could lock during extreme braking or when braking on slippery surfaces. Steering performance can also function differently and there is an increased risk of skidding and/or accident.
If , and 
come ON while driving both ABS and ESP have a fault. The brake system will continue to operate but without assistance from either ABS or ESP. Both front and rear wheels may lock under heavy braking which can result in longer braking distances in an emergency stop.
A message will also show in the right instrument cluster window with further information.
Drive on carefully and have the braking and ABS systems checked immediately by an Aston Martin Dealer.
Active Brake Assist
Warning: Active Brake Assist is an aid only and does not replace the need for driver awareness. It is the driver’s responsibility to be aware of their surroundings. Always make sure that there is a suitable braking distance for your vehicle.
Active Brake Assist is used to reduce the risk of an accidental collision with a pedestrian or another vehicle. This is achieved by giving visual and audible warnings when a collision risk is detected, and, if necessary, will assist in the application of the brakes. If the driver does not react to the risk of a collision, the system can also automatically apply the brakes.
Warning: If the driver does not react, and the vehicle is required to apply the brakes, this will happen for a maximum of 1.8 seconds. The purpose of the system to gain the driver’s attention to control the vehicle, and reduce the risk of rear impact from vehicles behind.
System Limitations
Active Brake Assist may not function correctly in the below conditions:
- The area around the multi-purpose camera is dirty, damaged or otherwise covered.
- Glare into the multi purpose camera from the sun or other road users’ headlamps.
- A pedestrian’s outline is concealed, or the system cannot determine a pedestrian’s outline due the background.
- There is lots of background radar reflection such as a multi-storey car park.
- The vehicle in front is either too narrow, such as a motorbike or the vehicle in front is offset and not following the same driving line.
- A vehicle moves very quickly into range of the radar.
Brake Pad Conditioning
Warning: For track use or high-speed driving, new brake pads must be correctly conditioned. Failure to correctly condition the pads may result in greatly reduced brake performance. Contact your Aston Martin Dealer for further information.
When new brake pads are installed the brake discs and pads need to be conditioned. During this time, brake performance will be reduced.
Avoid excessive brakings, such as hard stops from high speed and steep descents, for the first few hundred miles or kilometres1 after new brake pads are installed
Park Brake
Park Brake Operation
Warning: If the brake system warning symbol is ON or flashing, do not rely on the park brake to hold the vehicle stationary. Contact your Aston Martin Dealer.
When the vehicle is stationary, push the park brake switch (A) in and release. The warning symbol in the instrument cluster will come on when the parking brake is applied. The stop lamps will not come ON. The parking brake operates on the rear wheels of the vehicle.
Caution: Secure parking of the vehicle is dependent on being on a hard and stable surface. The rear wheels must be on a suitable surface to prevent vehicle movement.
The ignition control must on to release the parking brake. First, apply pressure to the foot brake then pull on the park brake switch and release. The symbol will go off to show the parking brake has been released.
Drive Away Release
Warning: Do not exit the vehicle with the engine operating and the transmission in D (Drive) or R (Reverse). Always select P (Park) before exiting the vehicle. If the transmission is left in D (Drive) or R (Reverse) , the vehicle can overcome the parking brake and start to move.
With the parking brake applied, select a forward or reverse gear and press the throttle pedal. The parking brake will release as the vehicle moves forwards or backward.
The park brake will not release when moving from stationary if a vehicle door is open. In this case, the parking brake must be released with the park brake switch.
Park Brake Operation While Moving
Warning: Repeated use of the parking brake to slow the vehicle, or driving the vehicle with the park brake applied can cause serious damage to the brake system.
In an emergency, push and hold the park brake switch to reduce speed. The symbol will come on, a warning sound will be heard and CAUTION PARK BRAKE APPLIED will be shown in the right instrument cluster window. Release the switch to cancel the park brake application whilst the vehicle is moving. The park brake will only apply as normal once the vehicle has stopped moving.
Park Brake Faults
Low Battery Voltage
If the battery voltage is too low, the park brake cannot be put on or off. Connect an auxiliary battery if the battery voltage is too low.
System Faults
If a fault in the system is detected, PARK BRAKE MALFUNCTION will show in the message center. Contact your nearest Aston Martin Dealer.
If the battery has been discharged or disconnected, APPLY FOOT AND PARK BRAKE will show in the message centre when the ignition is next ON. Press the foot brake down and pull the park brake switch up to put the park brake ON, this will reset the park brake system.
Aston Martin 2023 Top Accessories
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Reference Links
View Full User Guide: Aston Martin DBX 2021 User Manual
Download Manuals: https://www.astonmartin.com/en/owners/owners-guides
