Four Seasons HVAC Pressure Transducer 20997
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Four Seasons HVAC Pressure Transducer 20997
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Pressure Transducer for 2017-2024 BMW 740i & More - Four Seasons 20997

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$119.99
MPN: 20997
Item Package Quantity: 1
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Four Seasons HVAC Pressure Transducer P/N:20997
Four Seasons HVAC Pressure Transducer P/N:20997
$119.99

Replace a failing A/C pressure sensor with this Four Seasons switch, the system-mounted HVAC Pressure Switch / Pressure Transducer 20997, which senses refrigerant pressure and turns it into a signal the vehicle uses to manage A/C operation. It fits many vehicles, among them the 2017-2024 BMW 740i, 2008-2013 BMW M3 and 2017-2022 BMW Alpina B7, as a direct-fit replacement for the listed applications. See the Buyer's Guide tab for the full list. This part is listed under both names, switch and pressure transducer.

Four Seasons engineers and tests its products with the aim of years of trouble-free operation. It backs this part with more than 50 years of mobile A/C experience.

  • Corrosion protection: zinc coated to resist corrosion.
  • Vehicle-specific: designed for vehicle-specific applications.
  • Sealing parts included: contains the gaskets, O-rings or seals needed to properly replace the unit.
  • Easy identification: color coded so it is simple to pick out.

Signs this part may need replacing include A/C that blows warm, a compressor that won't engage or cycles erratically, or an A/C pressure sensor trouble code. If a failed pressure transducer is the cause, this unit replaces it. Diagnose the system first, because low refrigerant and other components can produce the same symptoms.

Frequently Asked Questions

What does the Four Seasons 20997 pressure transducer do?

It mounts in the A/C system and senses refrigerant pressure. It converts that pressure into a signal the vehicle uses to manage A/C operation. It is listed as both a switch and a pressure transducer.

Is this the right A/C pressure M3 switch for my BMW?

It is listed for the 2008-2013 BMW M3, along with many other BMW models. Check your exact vehicle in the Buyer's Guide tab before ordering.

What comes in the box with this pressure transducer?

It comes with the gaskets, O-rings or seals needed to properly replace the original. It is also color coded for easy identification.

What are signs the A/C pressure transducer may be failing?

Signs include warm air from the vents, a compressor that won't engage or cycles erratically, or a pressure-sensor trouble code. Low refrigerant can cause similar symptoms, so diagnose the system before replacing the part.

Do I need to discharge the A/C system to install it?

It depends on the vehicle and how the sensor mounts. Follow the vehicle service information, and have a certified technician recover the refrigerant when the procedure calls for it.

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