AC Blower Motor - what to replace
Thread Starter
Pit Crew
Joined: May 2007
Posts: 145
Likes: 13
From: FL
AC Blower Motor - what to replace
THe AC Blower motor in my 2008 Lexus RX350 seems to not move enough air. Runs slow, I guess.
What should I replace?. Apparently, there are three components:
1) Blower motor itself - Part No 87103-08080
2) Blower Motor Resistor - Part No 87165-22050
3) Blower Motor Control Module - 87165-04010
Also where should I buy these from. THere is always Toyota but very expensive. And you get Blower motors in Amazon/Ebay for $35 ~ $55. I do not want to install a sub par quality part as my daughter drives this car and I do not want her to deal with car issues. That is what Dads are for.
What should I replace?. Apparently, there are three components:
1) Blower motor itself - Part No 87103-08080
2) Blower Motor Resistor - Part No 87165-22050
3) Blower Motor Control Module - 87165-04010
Also where should I buy these from. THere is always Toyota but very expensive. And you get Blower motors in Amazon/Ebay for $35 ~ $55. I do not want to install a sub par quality part as my daughter drives this car and I do not want her to deal with car issues. That is what Dads are for.
Instructor
Joined: Aug 2023
Posts: 930
Likes: 440
From: ID
THe AC Blower motor in my 2008 Lexus RX350 seems to not move enough air. Runs slow, I guess.
What should I replace?. Apparently, there are three components:
1) Blower motor itself - Part No 87103-08080
2) Blower Motor Resistor - Part No 87165-22050
3) Blower Motor Control Module - 87165-04010
Also where should I buy these from. THere is always Toyota but very expensive. And you get Blower motors in Amazon/Ebay for $35 ~ $55. I do not want to install a sub par quality part as my daughter drives this car and I do not want her to deal with car issues. That is what Dads are for.
What should I replace?. Apparently, there are three components:
1) Blower motor itself - Part No 87103-08080
2) Blower Motor Resistor - Part No 87165-22050
3) Blower Motor Control Module - 87165-04010
Also where should I buy these from. THere is always Toyota but very expensive. And you get Blower motors in Amazon/Ebay for $35 ~ $55. I do not want to install a sub par quality part as my daughter drives this car and I do not want her to deal with car issues. That is what Dads are for.
Instructor
Joined: May 2007
Posts: 817
Likes: 364
From: CA
I agree with Leeper. Check your cabin filter first
Apply battery voltage to the blower motor, connect the negative (-) lead to terminal 1(Y) wire of blower motor connector, and the positive (+) lead to terminal 2 (R) wire, if the blower motor operates smoothly then it's OK.
Next step would be to check the blower motor controller and amplifier. Let us know.
Apply battery voltage to the blower motor, connect the negative (-) lead to terminal 1(Y) wire of blower motor connector, and the positive (+) lead to terminal 2 (R) wire, if the blower motor operates smoothly then it's OK.
Next step would be to check the blower motor controller and amplifier. Let us know.
Last edited by tammap; Mar 23, 2025 at 08:57 AM.
Instructor
Joined: Aug 2023
Posts: 930
Likes: 440
From: ID
I agree with Leeper. Check your cabin filter first
Apply battery voltage to the blower motor, connect the negative (-) lead to terminal 1(Y) wire of blower motor connector, and the positive (+) lead to terminal 2 (R) wire, if the blower motor operates smoothly then it's OK.
Next step would be to check the blower motor controller and amplifier. Let us know.
Apply battery voltage to the blower motor, connect the negative (-) lead to terminal 1(Y) wire of blower motor connector, and the positive (+) lead to terminal 2 (R) wire, if the blower motor operates smoothly then it's OK.
Next step would be to check the blower motor controller and amplifier. Let us know.
Racer
Joined: May 2017
Posts: 1,536
Likes: 356
From: Utah
Most common culprit when an interior fan is weak, and that’s a severely clogged hvac air filter, you can just remove the old one and see what it looks like and if the air flow improves without one. If it’s solves your problem then just get a replacement. This filter is mounted behind the glovebox and can usually be removed pretty easily. The next possible cause would be the blower motor resistor has malfunctioned. When this is the problem your fan will have the same, low pressure, on the 3lower fan speed settings and then if you turn the fan speed to the highest speed it will blow much faster. If your blower motor is worn out then it isn’t going to turn on at all, this is really rare but can happen.
Thread Starter
Pit Crew
Joined: May 2007
Posts: 145
Likes: 13
From: FL
My overarching question is - does the 2008 Lexus RX350 use both the Blower Motor Control module (Part No 68048901AA) as well as the Blower motor resistor?
What is the difference in their functions?
The air path/filter/cowl/fan blades are all clean.
What is the difference in their functions?
The air path/filter/cowl/fan blades are all clean.
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Instructor
Joined: May 2007
Posts: 817
Likes: 364
From: CA
Blower motor resistor = blower motor controller = control blower motor speeds using the signal from A/C amplifier
Blower motor control module = A/C amplifier = A/C ECU = control the entire heating and air conditioning (compressor clutch, idle speed. ect.)
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Lexus Champion
Joined: Apr 2019
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From: FL
Don't quote me but I think the AC Amplifier aka module is a small black box located under the glove compartment.
Pull the plastic stuff out of the way and remove the glove box and shine a flashlight straight up at the front edge under the dash closest to you.
Instructor
Joined: May 2007
Posts: 817
Likes: 364
From: CA
A/C Amplifier = 88650-0E021
Blower Motor Controller = 8716513010
Lexus Champion
Joined: Apr 2019
Posts: 11,404
Likes: 1,640
From: FL