SAS Reset: The final alignment stage

ResetUntil relatively recently, if you needed your car’s geometry adjusting following a wheel alignment check, the final stage of the job would be for your garage to make sure that your steering wheel was level.
Nowadays however, as cars are packed with more modern safety systems, this simply isn’t the case and unless your workshop carries out an additional process, your safety and your car’s performance may be compromised.
The extra step is related to your car’s Steering Angle Sensor (SAS) and this must be reset after an alignment check. Indeed, such is the importance of this process that many vehicle manufacturers now specify this important stage as part of their workshop procedure.
Steering Angle Sensors were introduced on vehicles as part of electronic stability programmes (ESP). Essentially, they help your car work out which direction you are trying to travel in, in comparison to the actual direction of travel, so it can make corrections as required. However, if the steering angle sensor is giving false readings, because it is not properly calibrated with the vehicle’s thrustline, then the ESP system may not function properly.
New cars are now being fitted with even more systems, such as active steering or lane departure warning, which also rely on the SAS, so it’s increasingly important that it’s giving the correct readings.
So when your car’s alignment is adjusted, it’s important that the Steering Angle Sensor is reset with the vehicle’s true straight ahead position. While this stage is incredibly important, it’s not a massive job for the workshop and should be completed as part of your Hunter four wheel alignment check. Remember this the next time you visit your nearest AlignMyCar centre and don’t be afraid to ask them when they’ve completed your wheel alignment if they’ve reset your car’s steering angle sensor. They’ll certainly be impressed with your knowledge and understanding!

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