Rivian R1 Brake Power Bleeder Adapter

[SilverArrow]

I flushed the brake fluid on my 2023 Rivian R1T today using Motive's Late-Model GM 3-Tab adapter and about 1.5L of brake fluid. I couldn't find any similar information information about which adapters would work for the R1, but luckily I already had this in the garage.

1108 Late-Model GM 3-Tab Brake Bleeder Adapter | Motive - Motive Products for reference.

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[hammick]

Any issues with air getting in the system? Did you have to pull the wheels? I bet Rivian wants a large amount of $$$ for a flush

 

[SilverArrow]

I didn't have any issues with air in the system using the power bleeder. I jacked up the vehicle and removed the wheels since I wanted to clean them. You might be able to get to the rears without removing the wheels because the bleeder screw is on the interior side of the caliper. The front calipers have bleeder screws on both halves of the caliper, so you'd probably only be able to access the interior side.

Both front and rear bleeder screws are 11mm.

I recently was quoted on a brake flush from the Portland service center and they listed something like 8 liters of brake fluid at $200+ per liter which was bonkers. Previous service was much cheaper so I'm not sure if it was just a mistake or what. Either way it's always going to be cheaper doing it myself.

 

[hammick]

I didn't have any issues with air in the system using the power bleeder. I jacked up the vehicle and removed the wheels since I wanted to clean them. You might be able to get to the rears without removing the wheels because the bleeder screw is on the interior side of the caliper. The front calipers have bleeder screws on both halves of the caliper, so you'd probably only be able to access the interior side.

Both front and rear bleeder screws are 11mm.

I recently was quoted on a brake flush from the Portland service center and they listed something like 8 liters of brake fluid at $200+ per liter which was bonkers. Previous service was much cheaper so I'm not sure if it was just a mistake or what. Either way it's always going to be cheaper doing it myself.

Wait they wanted over $1,600 to flush your brakes? That is beyond bonkers.

 

[SilverArrow]

Yeah I had to call them back up and confirm that the brake fluid quantity was correct. The service advisor was confident that he was correct. I'm sure it was a mistake because it only took three bottles (1.5L) in my vehicle. The price per liter for the factory fluid was about what it would cost to buy online so you can probably save a fair amount of money by just buying some alternative good quality fluid.

 

[hammick]

I'm guessing you just used Dot 4? If Supertech DOT 4 is good enough for my R1300GS that actually gets braked hard it's good enough for our R1S that rarely uses it's brakes.

 

[SilverArrow]

I used Motul DOT 5.1 because I'm a fan of that brand and will occasionally do a hot lap with the truck on track. It cost about $35 for a 3 pack (1.5L) from Amazon, but most DOT 5.1 fluid would be an improvement over the stock DOT4 fluid.

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