How does the A/C Expansion Valve facilitate the conversion of high-pressure liquid refrigerant to lower-pressure vapor in air conditioning systems on Mazda 3?

Air conditioning systems move the high pressure liquid refrigerant in the compressor to lower pressure vapor in the evaporator which is chilled as the refrigerant flows through the system and cools the air that flows into the vents. This is normally done through a sudden change of tubing size, and most vehicles have a removable controlled orifice in one of the AC pipes in the firewall. The mentioned models employ the use of an A/C Expansion Valve which functions in a similar way as a controlled orifice. An automotive air conditioning technician will need to empty out the air conditioning system first to replace the A/C Expansion Valve. The refrigerant lines must be disconnected at the HVAC unit after discharging, then the two bolts holding the valve to the evaporator can be removed allowing the valve to be removed.

Genuine Mazda 3 A/C Expansion Valve

Air Conditioning Expansion Valve

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8 A/C Expansion Valves found

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Mazda 3 Expansion Valve Part Number: BDTS-61-J14
$44.71 MSRP: $59.63
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Product Specifications
- Other Name: Valve, Expansion; Expansion Valve
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2019-2023 Mazda 3 | 2.0, 2.5 S, 2.5 Turbo, 2.5 Turbo Premium Plus, Base, Carbon Edition, Preferred, Premium, Select | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda 3 Expansion Valve Part Number: BJS7-61-J14
$52.55 MSRP: $70.08
You Save: $17.53 (26%)
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Product Specifications
- Other Name: Valve, Expansion
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2014-2018 Mazda 3 | Grand Touring, i Grand Touring, I Sport, i SV, I Touring, s Grand Touring, s Touring, Sport, Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda 3 Expansion Valve Part Number: BDEL-61-J14
$53.91 MSRP: $71.90
You Save: $17.99 (26%)
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Product Specifications
- Other Name: Valve, Expansion; Expansion Valve
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2019-2024 Mazda 3 | 2.0, 2.5 Carbon Turbo, 2.5 S, 2.5 Turbo, 2.5 Turbo Premium Plus, Base, Carbon Edition, Preferred, Premium, Select, Select Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda 3 Expansion Valve Part Number: KF03-61-J14
$86.91 MSRP: $115.91
You Save: $29.00 (26%)
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Product Specifications
- Other Name: Valve, Expansion
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2014-2018 Mazda 3 | Grand Touring, i Grand Touring, I Sport, i SV, I Touring, s Grand Touring, s Touring, Sport, Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda 3 Expansion Valve Part Number: DGK9-61-J14
$90.54 MSRP: $120.74
You Save: $30.20 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Valve, Expansion; Expansion Valve
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2019-2024 Mazda 3 | 2.0, 2.5 Carbon Turbo, 2.5 S, 2.5 Turbo, 2.5 Turbo Premium Plus, Base, Carbon Edition, Preferred, Premium, Select, Select Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda 3 Expansion Valve Part Number: BDGF-61-J14
$97.33 MSRP: $129.79
You Save: $32.46 (26%)
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Product Specifications
- Other Name: Valve, Expansion; Expansion Valve
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2019-2023 Mazda 3 | 2.0, 2.5 S, 2.5 Turbo, 2.5 Turbo Premium Plus, Base, Carbon Edition, Preferred, Premium, Select | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda 3 Expansion Valve Part Number: BBP2-61-J14
$103.13 MSRP: $137.53
You Save: $34.40 (26%)
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Product Specifications
- Other Name: Valve, Expansion
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2010-2013 Mazda 3 | i, Mazdaspeed, S | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS
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Mazda 3 Expansion Valve Part Number: BP4K-61-J14A
$104.60 MSRP: $139.49
You Save: $34.89 (26%)
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Product Specifications
- Other Name: Valve, Expansion
- Replaces: BP4K-61-J14
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2004-2009 Mazda 3 | i, Mazdaspeed, S, SP23 | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS

Mazda 3 A/C Expansion Valve

The Mazda 3 A/C Expansion Valve is the part that regulates the flow of refrigerant entering the evaporator and cools the cabin quickly and under control. This valve operates between the high-pressure discharge line and the low-pressure suction side, adjusting the flow of refrigerant in real time based on the temperature of an internal temperature-sensing bulb connected to spring-loaded internal components so that when additional chill is required pressure decreases, and whenever demand drops pressure increases. During the life of the Mazda model line, two metering styles have been observed, namely the adjustable A/C Expansion Valve described above and a simpler fixed orifice tube. They are both applied to separate the high and the low sides, but they handle flow differently. The valve style continuously adjusts the pressure and allows the compressor to run smoothly with identical temperatures, and the orifice tube has no moving parts, which predetermines the constant opening that helps the compressor switch on and off to maintain comfort. With the Mazda 3 A/C Expansion Valve rather than the tube, occupants experience faster cabin cooling and reduced temperature extremes. The valve configuration typically provides drivers with more constant vent temperatures and a little higher efficiency in comparison to the tube, which is a more simple, cost-focused solution. In either case, each device is intended to supply the correct amount of refrigerant in order to ensure that the evaporator does not flood. Proper valve operation in all Mazda air conditioning systems ensures that the inside of the vehicle is comfortable, even on hot summer days, thereby preserving the well-being of the compressor and the entire system.

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Mazda 3 A/C Expansion Valve Parts and Q&A

Expansion Valve
BP4K-61-J14A
Q: How does the A/C Expansion Valve facilitate the conversion of high-pressure liquid refrigerant to lower-pressure vapor in air conditioning systems on Mazda 3?
A:
Air conditioning systems move the high pressure liquid refrigerant in the compressor to lower pressure vapor in the evaporator which is chilled as the refrigerant flows through the system and cools the air that flows into the vents. This is normally done through a sudden change of tubing size, and most vehicles have a removable controlled orifice in one of the AC pipes in the firewall. The mentioned models employ the use of an A/C Expansion Valve which functions in a similar way as a controlled orifice. An automotive air conditioning technician will need to empty out the air conditioning system first to replace the A/C Expansion Valve. The refrigerant lines must be disconnected at the HVAC unit after discharging, then the two bolts holding the valve to the evaporator can be removed allowing the valve to be removed.