Gary123
Posts: 1
Joined: Sun Nov 15, 2020 7:18 pm
Delivery Date: 16 Nov 2020
Leaf Number: 313711

Premature brake wear

Sun Nov 15, 2020 7:51 pm

I recently took my 2018 Leaf SV into the dealership for its 2 year service. They presented me will a bill for CDN$1,100.00 for a complete brake replacement. They said that the rotors were rusty and they had caused unusual and excessive wear on portions of the brake pads. On a two year old car still under warranty with 39,000 kms I was very disappointed in this situation.

I rarely ever use the brakes as I always use the e-pedal function. I believe that Instead of the brakes being used regularly as in an ICE car, the brakes on my car almost never get used, and they became rusty as a result.

I believe what is happening is that the e-pedal technology has created a situation where a conventional braking system using standard quality hardware that worked perfectly well on conventional cars is no longer suitable without improvements to the design to prevent premature rusting.

What Nissan needs to do is to inform owners of the Leaf with e-pedal technology of this situation. As the e-pedal technology is relatively new, it is probably only now becoming apparent that the brakes will fail prematurely if they are not used enough to prevent rust forming on the rotors. Using the e-pedal is supposed to save energy and therefore to save money. if this technology causes repairs of $1,100.00 every two years, it is not anywhere near a cost-effective solution as currently designed.

LeftieBiker
Moderator
Posts: 15742
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Premature brake wear

Sun Nov 15, 2020 11:35 pm

E-pedal does use the hydraulic brakes to stop the car. I think you have a crooked dealership.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

GerryAZ
Gold Member
Posts: 2631
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Premature brake wear

Mon Nov 16, 2020 1:13 am

LeftieBiker wrote:
Sun Nov 15, 2020 11:35 pm
E-pedal does use the hydraulic brakes to stop the car. I think you have a crooked dealership.
+1
Brakes last a long time on Leafs. I inspect the brakes when tires are rotated or replaced and brakes were fine at last inspection before crash of 2011 at over 50,000 miles and last inspection before trade of 2015 at over 80,000 miles. 22,000 miles so far on 2019 with no brake issues. Leafs manufactured in USA (also 2011 and 2012 Leafs manufactured in Japan) have ceramic brake pads that last a long time. Rust on rotors is not detrimental to the pads and gets wiped off whenever brakes are used.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019

kaiat
Posts: 44
Joined: Thu Oct 23, 2014 1:56 am
Location: Bergen, Norway

Re: Premature brake wear

Mon Nov 16, 2020 3:44 am

Premature brake wear is a big issue here in Norway at least. Not only for Leaf or other EVs, but also many ICEs are affected of this as well. Norwegian dealerships usually offer to dismantle the brakes and grease them up in addition to the regular servicing. Some owners will do this themselves when changing between summer- and winter tires (not a hard job to do). I have done this myself on several cars and things are often pretty seized up.

The roads are being salted during the winter months and this has the nasty effect of causing cars to rust badly. Brakes are easily corroded and seize up under such circumstances. The rear brakes are particular affected since they apply less force than front brakes when braking. This is why VW has gone back to rear drum brakes on the ID3, things are a little bit better protected against the elements with drum brakes. I see that the OP is located in Canada, so I am guessing they are salting the roads there as well.

EVs are a little bit more prone to this than ICEs because regeneration so the brakes are used less - but it is not an unique issue for Leaf, all EVs have this problem.

LeftieBiker
Moderator
Posts: 15742
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Premature brake wear

Mon Nov 16, 2020 4:53 am

The roads are also salted here where I am, but I turned in my 2013 in 2018 with zero brake problems. Brake rust issues are not not common with Leafs in the US, and AFAIK, not in Canada, either.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

User avatar
Nubo
Posts: 5799
Joined: Fri May 28, 2010 11:01 am
Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: Premature brake wear

Mon Nov 16, 2020 12:48 pm

kaiat wrote:
Mon Nov 16, 2020 3:44 am
...The roads are being salted during the winter months and this has the nasty effect of causing cars to rust badly. Brakes are easily corroded and seize up under such circumstances. The rear brakes are particular affected since they apply less force than front brakes when braking. ...
Surface rust (thin powdery layer) is not a problem. It gets buffed off within the first few brake applications of the day. But as you note more aggressive rust can be, if it causes pitting in the braking surface or if the particles become large enough to cause accelerated wear. The degree of problem is dependent on how long the car sits unused in rusting conditions and of course salt is a tremendous accelerant. It's been many years since I lived in the Rust Belt, but the horrors of salt corrosion are still etched in my memory.
I noticed you're still working with polymers.

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