RX - 4th Gen (2016-2022) Discussion topics related to the 2016 and up RX350 and RX450h models

Low brake power light, RX not starting?

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Old 12-19-22, 05:59 PM
  #226  
dibl
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Originally Posted by Kranny
I picked up a used 2016 RX350 in mint condition ...
... or possibly not.

Regardless of your understanding of the age of the car's battery, this issue has "battery" written all over it.
Old 01-31-23, 06:16 AM
  #227  
bamagirl11
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Default Any More Problems

Originally Posted by SmithyINC
Very happy camper! Had these same issues, car made horrible sound, low brake power, all sorts of random error codes showed up and wouldn’t start. Was so hoping it wasn’t the vacuum issue. Jumped the car and boom...started like a champ. Went to autozone got a new $200 battery (why the hell are they so expensive) and the car is like new. So happy I didn’t pay to tow to dealer. Car had original battery and I guess 4 year battery life isn’t so bad in Houston.
Have you had any more problems since you replaced the battery? I had the same issue with mine last night. The brake was already pressed all the way down and no official start. All the lights on the panel lighting up stating low brake power. I replaced my battery last night and I was able to drive it today. Please advise when you can if you’ve had any more problems. Thank you can.
Old 04-17-23, 05:01 PM
  #228  
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Similar issue with my 2020 RX350 . getting braking power low and power steering malfunction warnings. I will have it checked at the dealer next week. I hope it is just the battery.
Old 10-15-23, 06:59 AM
  #229  
Tajai7
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Default Same issue, new battery solved it!

I had a similar issue on my 2016 RX350. My situation was the car was dead, kept clicking/turning over when trying to start it. I tired recharging my battery and was met with a bunch of errors (see photos - first displayed Low Brake Power for a second and then showed the AWD malfunction error). After reading multiple forums regarding the Low Brake Power and AWD messages, I ended up buying a new Interstate battery, let the car sit for 30 minutes to reset the ECU before connecting it, hooked it up and everything cleared and is working great!






Last edited by Tajai7; 10-15-23 at 07:08 AM.
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Old 10-15-23, 07:29 AM
  #230  
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Yes, batteries seem to be behind lots of issues on Lexus' and Toyotas.
Old 05-08-24, 10:09 AM
  #231  
subhastheboss
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Default Low Brake Power - misleading

Error Messages: Low Brake Power

Read many comments on this board. Some say Brake Booster and some say Battery. Called CAA. They came and jump-start the car. I let the car run for a while. Shut it off. The car started again and again. Told my wife not to drive unless getting stuck. I'm looking for a new battery. I like Interstate batteries.

Interstate BESTMTP-24F Group Size 24F 750 Cold Cranking Amps (CCA) 30 Month Warranty 750 Cold Cranking Amps (CCA)
CAN $284.95 MSRP
Or
Super Premium - MTZ-34R Group Size 34R 800 Cold Cranking Amps. (CCA) Group Size 34R Mounting Flexibility Almost 3X the life of conventional flooded batteries
Absorbed Glass-Mat (AGM) 40% more cranking power. Plenty of power for accessories and plug-ins - even while the engine is off
CAN $544.95
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