Is the fan for your Toyota's heat or A/C not working on some speeds, or maybe not at all? The problem could be this little guy – the HVAC Blower Motor Relay. This is the genuine Toyota replacement part, number 90080-87026. Relays are like remote-controlled switches for high-power circuits; they take a small signal from your dashboard controls and use it to turn on the big power needed to run the blower motor fan. If this relay fails, your fan stops. Replacing it is usually a pretty straightforward fix. This part is vehicle-specific, so make sure it matches your Toyota's model and year. It comes as a single relay, lightweight at about 0.1 pounds. A simple swap can save you a trip to the mechanic and get your climate control blowing strong again. Always disconnect your battery before working on electrical components!