Standard Ignition AX388 Cabin Air Temperature Sensor
OE Quality 60-Day Returns
Standard Ignition

Standard Ignition AX388 Cabin Air Temperature Sensor

Brand Standard Ignition AX388
Color Green, Black
Connector Gender Female
Connector Shape Rectangular
Connector Type Plug In
Contents Sensor
Mounting Bracket(s) Included No
Terminal Gender Male
Terminal Type Pins
Wiring Harness Included No
Fits Toyota · 7 vehicles

Plug-in design. Female rectangular connector for straightforward sensor replacement.

Single-sensor unit. Includes the sensor only for a clean, focused repair.

Standard Ignition quality. Trusted HVAC sensor from a long-established aftermarket brand.

Cross-references Standard Ignition AX388, 8862545020E0 and ATSA259 for the same application. See all 5.

$72.45Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $72.45
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Cabin Air Temperature Sensor options

Cabin Air Temperature Sensor for Toyota Sienna

Standard Ignition AX388 is a cabin air temperature sensor built for HVAC temperature monitoring in select Toyota Sienna applications. It uses a rectangular female plug-in connector with male pins and a green/black finish for direct replacement service.

Fits 2004-2010 Toyota Sienna, N/A. This part cross-references 8862545020E0 and ATSA259 for the same application.

Key Features

  • Cabin air temperature sensor for HVAC system input
  • Rectangular female connector with plug-in design
  • Male pin terminals with 2-terminal configuration
  • Green and black sensor housing finish
  • No mounting bracket included
  • No wiring harness included
  • Standard Ignition AX388 replacement part

Product Details

The Standard Ignition AX388 is a cabin air temperature sensor used in HVAC control systems to report interior air temperature data. In 2004-2010 Toyota Sienna models, the listed fitment notes also reference rear window defogger module connector compatibility with the rear HVAC floor mode door actuator harness and power seat switch, so confirming connector style and application details before installation is important. Standard Ignition AX388 is a direct-fit service part for vehicles that use this connector and sensor configuration.

Common Issues This Part Can Address

  • Incorrect cabin temperature readings in the HVAC system
  • Unstable automatic climate control operation
  • Fault codes related to interior temperature sensing
  • Poor HVAC response to cabin temperature changes
  • Connector or terminal mismatch during sensor replacement

Installation Notes and Tips

Verify the connector shape, terminal style, and vehicle-side harness before installation. Compare the original sensor and connector layout to the replacement part, especially on Toyota Sienna models where the fitment notes reference multiple rear-area connector applications. Inspect the HVAC connector for corrosion, bent pins, or damaged terminals before plugging in the new sensor.

Quality Assurance

Standard Ignition replacement parts are built for service use in automotive electrical and HVAC applications. Confirm part number AX388 and vehicle fitment details before installation to ensure the correct application.

Related reading

This part fits 7 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2010ToyotaSiennaN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
2009ToyotaSiennaN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
2008ToyotaSiennaN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
2007ToyotaSiennaN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
2006ToyotaSiennaN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
2005ToyotaSiennaN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
2004ToyotaSiennaN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Standard Ignition — AX3888862545020E0ATSA259TS57515WT5824