MAP (Manifold Absolute Pressure) sensor Vacuum Sensor Location

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by wr69, Jul 28, 2025 at 12:36 AM.

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  1. wr69

    wr69 Member

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    Does anyone have the part number and location for the MAP Sensor in Prius Gen4. I used to clean this periodically on my Gen3, but cannot find it easily on the Gen4. thx in advance!
     
    #1 wr69, Jul 28, 2025 at 12:36 AM
  2. Mendel Leisk

    Mendel Leisk MMX GEN III

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    Here's a repair manual excerpt on it's location. The illustrations commencing with gen 4 are mostly-if-not-all just screen grabs from Toyota's modelling program, so not the best. I'd suspect it's similar to gen 3, just downstream of the throttle body.

    BTW, Toyota refers to it by the catchy name:

    E.F.I. Vacuum Sensor Assembly (Manifold Absolute Pressure Sensor)

    For part no I'd just contact a dealership parts department, if-and-when.
     

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    #2 Mendel Leisk, Jul 28, 2025 at 11:44 AM
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