this post was submitted on 23 May 2025
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[–] [email protected] 13 points 23 hours ago (4 children)

Nope. The only fluid I worry about in my EV is windshield wiper fluid.

[–] [email protected] 11 points 16 hours ago (1 children)

Eventually, you'll have to top up your blinker fluid as well.

[–] [email protected] 1 points 6 hours ago

Oh, dip!

(Pun intended)

[–] [email protected] 13 points 21 hours ago (1 children)

No brake calipers or power steering onboard?

[–] [email protected] 2 points 18 hours ago (1 children)

Hmm do brake calipers age? You’re not really using your brakes during normal driving.

Power steering and other hydraulics would need changing eventually.

[–] [email protected] 6 points 18 hours ago (2 children)

Brake fluid is hygroscopic and will accumulate water over time despite being in a nominally sealed system. Water in solution with brake fluid noticeably lowers the boiling point which leads to issues under repeated braking (e.g. down long steep hills) as the fluid boiling means you lose braking capacity in that circuit.

You should ideally be changing the brake fluid every few years (2-3 being the typical recommendation) and that applies even if the brakes are used less often.

[–] [email protected] 3 points 12 hours ago

You can use DOT 5.1 to significantly increase that wet boiling point, but it's expensive for normal car use. I usually use it in my motorcycle, since I've experienced brake fade on that before, and it's... Not fun.

[–] [email protected] 5 points 17 hours ago (2 children)

Seems like 60k miles for brake fluid replacement and 80k miles for low conductivity coolant replacement. Then also replace the normal coolant at 120k miles. This is for an Ioniq5.

I feel like most electric cars don’t need to use brakes going downhill. The regen is heavy enough to maintain a reasonable speed.

[–] [email protected] 1 points 7 hours ago

True, and ICE cars don't need to use brakes on long hills either. Use your transmission; that's why they put those manual shift features into the car

[–] [email protected] 1 points 17 hours ago

The Regen in my Kona will stop me even on the steepest hill if I let auto do its thing. Shits wild.

[–] [email protected] 10 points 23 hours ago

And the blinker one right? EVs still have that afaik.

[–] [email protected] 6 points 23 hours ago

Got my mechanic to replace the transmission fluid in mine after 80,000km, cost $90NZD