Brake pad wear?

[pasdechevre]

Something isn't right. My wife an an ICE Honda Pilot SUV and the original brakes are still on that at 50k miles. If the pads are gone at 27k there is a problem. Any pulling or other odd handling issues with the truck?

nothing else strange with the truck. Initially they said it might have to do with me towing but I have only towed about 3-4K of the miles. Something is definately a bit weird, the question is if it is something with my vehicle / just in regions where it's wet / cold and things rust or if it's a bigger issue. We'll find out.

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[zefram47]

nothing else strange with the truck. Initially they said it might have to do with me towing but I have only towed about 3-4K of the miles. Something is definately a bit weird, the question is if it is something with my vehicle / just in regions where it's wet / cold and things rust or if it's a bigger issue. We'll find out.

What sort of efficiency do you see on the daily or lifetime and wheels/tires are you on? If it's much lower than average it could be they were dragging a lot. I've been trying to dry my rotors before parking when it rains, but without being able to overlap throttle and brake it's difficult to do.

 

[JayinNJ]

Just had a chat with the technician here in Chelsea, MA. They have seen three examples of this in New England and have elevated this for further inquiry. The working theory is that the climate in New England (wet and cold) creates rust on the pads. (I think this is a known EV issue friends in Norway had to change rotors because they were rusted ). The difference with Tesla is the hold feature that actually holds the Rivian whereas Teslas will "creep". That is the story and it makes sense. My technician said Rivian is looking into what this will mean for warranty etc. As mentioned early they took the labor off immediately. Should have my truck back in an hour or two.

Teslas hold the same. It is an option, but most use hold and not creep.

 

[Throwdown]

Even with max regen it still uses the brakes more than you would think. However I find it hard to believe they are as low as they say. I was told my prius brake pads were at 6mm at 25k miles by Toyota while getting a recall done. I sold that car with 105k miles and they were still at 8mm. Check them yourself.

 

[Electrified Outdoors]

Rust should not make them wear out. As far as I know the only thing that will wear them down is being pressed against the rotors. With regen they should easily last 100k miles. If you have an IR thermometer maybe try taking temp measurements from each corner to see what the temps are. How could they wear out like that unless they are sticking? I will be anxious to hear with Rivian has to say about it. Hold mode just applies the brakes at a stop vs. having to hold your foot on the brake to keep the vehicle from moving. It shouldn't build up hardly any heat or cause much of any wear since the vehicle is nearly stationary when the brakes are actuated.

 

[BrianNakata]

That's a really good point and reminded me that not long after I got my T, I came home from a drive around town and just for kicks, felt the front rotor. It wasn't hot, it wasn't warm, it was COLD.

 

[pasdechevre]

What sort of efficiency do you see on the daily or lifetime and wheels/tires are you on? If it's much lower than average it could be they were dragging a lot. I've been trying to dry my rotors before parking when it rains, but without being able to overlap throttle and brake it's difficult to do.

I am tend to be at the efficience or above what Rivian is expecting through the mapping system. I can't say I have noticed anything dragging on noisy.

 

[pasdechevre]

What sort of efficiency do you see on the daily or lifetime and wheels/tires are you on? If it's much lower than average it could be they were dragging a lot. I've been trying to dry my rotors before parking when it rains, but without being able to overlap throttle and brake it's difficult to do.

stock Pirelli's 21" is what I am driving on, efficiency right on par with what I am expecting.

 

[Goose]

what regen setting are you all needing new pads using? I'm wondering if the "high" regen setting is actually blending the mechanical brakes in with the regen.

 

[pasdechevre]

what regen setting are you all needing new pads using? I'm wondering if the "high" regen setting is actually blending the mechanical brakes in with the regen.

high regen setting

 

[Goose]

high regen setting

Interesting. I look forward to other responses for a larger sample size. Anyone using "standard" regen want to chime in? How are your rotors and pads looking?

 

[zefram47]

what regen setting are you all needing new pads using? I'm wondering if the "high" regen setting is actually blending the mechanical brakes in with the regen.

Definitely not blending. If it was, we wouldn't see the issues when regen throttles back due to temperature (cold or hot). Super easy to come down a canyon road and suddenly have zero regen and have to dive for the brake pedal. My MINI would still use the brakes for stability control, but you had to really be romping on it for that to come into play. I hate to think that the Rivian would be constantly managing traction/stability control with the brakes when they have such fine motor control at each wheel.

 

[opnwide]

I only have 3200 miles on my S, exclusively in High Regen, so not the best comparison, but after my drives, (including the top of Loveland Pass in the Rockies and back down) the front calipers are cold, and from the photos, I don’t think my rear pads have ever touched the rotors, as witnessed from the brand new striations still present on the rear rotors…would be interesting to see others’ rotor photos.

 

[mindstormsguy]

The Rivian does blend the brakes in for the last few mph of a stop with regen. You can feel/hear it sometimes under the right conditions.

I wouldn’t expect this to wear out the pads very quickly, but I don’t think the comments about no blending are correct.

 

[shap]

The Rivian does blend the brakes in for the last few mph of a stop with regen. You can feel/hear it sometimes under the right conditions.

I wouldn’t expect this to wear out the pads very quickly, but I don’t think the comments about no blending are correct.

I have x5 45e. It also blends the breaks at the last few mph. X5 also has very weak regen in general. Said that my, pads are 9mm (out of 12mm) after 38k. My friend with x7 40i replaced pads and rotors at 30k. But he is driving in a very "aggressive" way.

I just do not get how Rivian can require a brake pad replacement at such low mileage, taking into consideration the high regen feature.

Either driver was slamming the brakes, or Rivian abused friction brakes for stability/traction control.
If the latest is true - it would be really bad, but hopefully fixable in OTA.

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