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Adding Brake Fluid - not a straight shot

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by KJF, Sep 29, 2010.

  1. KJF

    KJF Member

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    I was startled to see that the brake fluid reservoir (back right side of engine compartment) is tucked underneath a ledge. Therefore I cannot pour the fluid directly into the reservior to top it off. What have any of you folks done to solve this problem? Any ideas other than dirtying a funnel?
     
  2. cproaudio

    cproaudio Speedlock Overrider

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    How bout lifting that cover?
     
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  3. qbee42

    qbee42 My other car is a boat

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    At 55,000 miles on my Gen II Prius, the only fluid I have added is windshield washer fluid. Other than oil changes, there isn't much to do. Dirtying a funnel isn't a big deal if you do it once in the life of the car.

    Tom
     
  4. spiderman

    spiderman wretched

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    Is the fluid really that low? I am surprised if it is. You might take a quick check around the rear of the wheel housings to see if there is any leakage.
     
  5. RRxing

    RRxing Senior Member

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    Here's how... View attachment 25962
     
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  6. KJF

    KJF Member

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    After cproaudio mentioned a cover, I went back and looked again. Sure enough, there are two squeeze tab deals to remove the plastic ledge/rubber gasket just above the brake fluid resevoir. So that problem is solved.

    Now I, too, am wondering why I need to add any fluid at 15,000 miles. I had the brake recall done. I was under the assumption that this was a software fix only. So there should be no loss of brake fluid from that, correct? So exactly where should I look for brake fluid? I am a DIY as much as possible. Just did my second oil change but was only looking at the oil filter/plug area.

    Or maybe I should have the dealer look at it for free????
     
  7. cproaudio

    cproaudio Speedlock Overrider

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    Have you been using regen as the main source for braking or are you one of those that accelerate up to a redlight then hit the brakes at the last minute? If latter then your fluid went into the pistons in calipers. Did the brake warning light come on?
     
  8. spiderman

    spiderman wretched

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    As cp mentioned, as your pads wear, fluid fills in so you will see a lower level over time. The more you use your friction brakes, the faster the fluid goes down. However, I suppose you might have had a low level from the factory. It wouldn't hurt to have it looked over though.
     
  9. adamace1

    adamace1 Senior Member

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    Was your fluid low? My car is below the full mark but above the low mark so thats fine with me.

    If so you need to take it to a dealer and have them note that the fluid was low and try to fix the problem. Even if they find nothing wrong you will have proof that it was low and if later down the line it gets low again and your out of warranty they should help you, because they didn't fix the problem under warraty when you gave them the chance.

    I believe this is the best thing to do becaue

    1. There are brake parts that can cost over 3k to fix and are only under warranty for 3 years 36k miles.

    2. You paid for a new car and when it comes to the brakes i'd let Toyota spend it's time find the problem.
     
  10. KJF

    KJF Member

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    I do not use the regen as my main braking source. I do not slam on the brakes to stop. Think I am pretty conservative with the regen and the brakes. I am the sole driver. No brake warning light has come on.

    I have seen no leaks but that does not mean there aren't any. I asssume I should look on the inside of all the wheels and then underneath the brake fluid reservoir assuming that the brake master cylinder is underneath that.

    I think I would have noticed if the brake fluid reservoir was low when I got the car as I tend to keep an eye on all fluids. It is now just below the middle mark on the reservoir (about halfway between the MAX and MIN mark).

    I am getting ready to be gone for 3 weeks so it will have to wait. I don't want to add fluid as then the dealer may not believe there is a problem. I will see what the level looks like after three weeks of sitting.

    My current plan is to have the dealer look at it. Thank you for all your suggestions. I will report back after my trip to the dealer.
     
  11. spiderman

    spiderman wretched

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    I suspect they will say that is perfectly normal.
     
  12. spiderman

    spiderman wretched

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    I suspect they will say that is perfectly normal. In fact that is where mine is.
     
  13. KJF

    KJF Member

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    So how many miles do you have on your car and are you concerned that it is halfway down? Maybe I am over-reacting?
     
  14. spiderman

    spiderman wretched

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    ^ I have almost 15,000 and I am not at all worried about it.
     
  15. adamace1

    adamace1 Senior Member

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    I have 26,000 miles and have always noticed mine is have way between the two marks. Same as both collant tanks.
     
  16. cossie1600

    cossie1600 Active Member

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    They are suppose to go down as your pads wear
     
  17. KJF

    KJF Member

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    This is the Original Poster reporting back after a trip to the Toyota dealer today regarding low brake fluid in the reservoir (16,000 miles on the car). They put it on the lift and checked all four wheels plus the area under the reservoir plus inside the car at the brake pedal. No leaks found. While they were doing this, I wandered into the showroom and looked under the hood of a 2010 Prius and low and behold, the fluid in the reservoir was just below the mark halfway between MAX and MIN. So then we went out on the lot and looked at three other 2010's and they were all the same as mine! So I have concluded that I did not really look closely at the fluid levels when it was new, assuming that they would all be correct. The guys did not know of any reason why the cars would arrive with the fluid level at the halfway mark but we all agreed that all is OK. There was no charge (they offered to top it off but I said that was OK - I have brake fuid at home to use when I decide it is needed).

    So we all learned something and I have a record of my concern in case anything goes wrong later. I will sleep soundly knowing my car is not "using" brake fluid.

    I used my reward points from my Toyota Rewards Visa card to purchse OW-20 oil ($6.66 per quart - not bad in my opinioin) and spare pushpins (for the access door to the oil pan/filter area) in case I break any during an oil change.
     
  18. ETC(SS)

    ETC(SS) The OTHER One Percenter.....

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    I'm glad. NO car should ever "use" brake fluid...it's a sealed system. Your resovoir level should drop slightly as your brake pads wear, but this is normal---even if you NEVER use regenerative braking. I've never used regenerative braking in my GMC Sierra (somehow it never works! :D) and I've not noted any brake fluid "loss" in 81,000 miles.

    It's possible that the normal service level in a G3 is..... (pause for effect...) half way between the 2 marks.

    I'm still a Prius noob, so I do not know for sure.:cool:
     
  19. solrunner

    solrunner Member

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    Per the video below it should never be at max, because the system pressurizes the brake system. If you topped it up to max and depressurized the system it could overflow or something.