Subaru WRX STI 2021 User Manual (English)

Other manuals for Subaru WRX STI 2021

Owner's Manual488 pages

Manual124 pages

Questions and Answers:

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ericsteeleAug 17, 2025
Why does my Subaru WRX STI 2021 Automobile activate braking control frequently in heavy traffic when using Adaptive Cruise Control?
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  erin85Aug 17, 2025
  When Adaptive Cruise Control is activated, the EyeSight system adjusts to vehicles or objects the camera system is detecting. As a result, acceleration and deceleration may be more frequent while the system adjusts. If it is difficult to maintain a consistent following distance under certain conditions (such as in heavy traffic, poor weather or urban environments, etc.), avoid using Adaptive Cruise Control.
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Steven DunnAug 19, 2025
Why is the timing of the “Obstacle Detected” warning in my Subaru Automobile sometimes earlier or later than normal?
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  Susan PorterAug 20, 2025
  The “Obstacle Detected” warning sounds when the system determines that more braking is necessary, based on conditions such as the distance from the vehicle in front and the difference in speed compared to it. As a result, timing may vary depending on how the brakes are applied in relation to the vehicle in front, and your relative speed to that vehicle.
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Jasmine HessAug 22, 2025
What to do if I hear a noise when automatic braking control activates in my Subaru WRX STI 2021 Automobile?
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  Jennifer DuncanAug 22, 2025
  The sound you are hearing is the normal operation of the automatic braking control. There are some mechanical components to the system, and they do occasionally make audible sounds during automatic braking control. This sound is not a malfunction.
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Ryan RiversAug 26, 2025
Why was Lane Keep Assist unexpectedly canceled in my Subaru WRX STI 2021 Automobile?
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  Kyle FuentesAug 26, 2025
  If the system does not detect the steering operation of the driver, it will temporarily cancel Lane Keep Assist. This can happen if you take your hands off the steering wheel or just lightly put your hands on the steering wheel while driving. Also, Lane Keep Assist does not operate while turning a tight corner.
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katrina02Aug 28, 2025
Why is Adaptive Cruise Control activated in my Subaru WRX STI 2021 even though there is no vehicle in front?
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  Crystal CunninghamAug 28, 2025
  Depending on the road conditions, vehicles in neighboring lanes may be detected as well as a vehicle directly in front. Also, when driving on a curve, braking control may be activated in response to guardrails, the angle of the steering wheel, or roadside structures.
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Ivan HintonAug 31, 2025
Why does EyeSight not restart after a temporary stop in my Subaru WRX STI 2021 Automobile?
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  Sharon WernerAug 31, 2025
  If Vehicle Dynamics Control is deactivated, all of the functions of EyeSight are not available. The Vehicle Dynamics Control OFF indicator light within the combination meter illuminates, and the Vehicle Dynamics Control traction mode indicator light turns off. Also, in poor weather conditions with heavy rain, snow, fog, or dust, EyeSight may temporarily stop operating while visibility is very poor. Replace the wipers with new ones, or clean the oily film off the windshield. EyeSight may also temporarily stop operating if your vehicle is subject to sunlight from the front (sunset or sunrise, etc.) or to bright headlights from oncoming vehicles at nighttime or if you are parking in an extremely hot or cold condition.
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Amanda RichardsSep 2, 2025
Why is the electronic parking brake applied automatically while the stay-stopped function is operating in my Subaru WRX STI 2021 Automobile?
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  hleeSep 2, 2025
  The electronic parking brake will be applied automatically if the stay-stopped function is continuously applied for approximately 2 minutes or automatic cancel conditions have been met.
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Justin CarrollSep 5, 2025
Why does Lane Keep Assist not operate even though there are lane markers on my Subaru WRX STI 2021?
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  Juan RobinsonSep 5, 2025
  To operate Lane Keep Assist, the width of the road should be between approximately 10 ft (3 m) and 15 ft (4.5 m).
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Phillip CookSep 12, 2025
Why does the Lead Vehicle Start Alert activate even though there is no vehicle in front of my Subaru WRX STI 2021 Automobile?
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  Eric Myers Jr.Sep 12, 2025
  Depending on surrounding objects, traffic environment and weather, the Lead Vehicle Start Alert may issue a warning in response to objects other than a vehicle that appears in front of your vehicle.
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Carolyn MarshallSep 13, 2025
Why is acceleration slower or faster when the vehicle in front has turned off the roadway or the distance from the vehicle in front has increased in my Subaru WRX STI 2021 Automobile?
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  Cody GuerreroSep 13, 2025
  Depending on the timing of when the detection of the vehicle in front is lost, EyeSight’s ability to react may be slower, causing the start of acceleration to feel delayed and braking time to feel longer than what seems to be normal operation. Also, acceleration may vary because the cruise control characteristics vary depending on the selected SI-DRIVE mode.