The first standalone Subaru WRX (VA) 2015-2021 split from the Impreza line, pairing a 268bhp 2.0-litre turbo boxer with symmetrical all-wheel drive and a rally-bred chassis. All that performance hardware sits behind sensors and modules that expect a reset after maintenance. Following an oil change the maintenance reminder is cleared so the service interval restarts accurately. Track-focused owners changing pads should run the brake pad wear reset, and seasonal tyre rotation makes a TPMS reset worthwhile. A replacement battery calls for a battery reset to let the engine management relearn fuelling, while steering angle calibration keeps the stability control honest after alignment. If the windows lose auto-up, electric window initialization restores it. Pick the reset that fits your WRX below.