2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Buying the "right" Brake Master Cylinder

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Old Apr 13, 2026 | 07:01 PM
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Question Buying the "right" Brake Master Cylinder

So my brake master cylinder has gone kaput and I am looking through all the different options there are for my year model.

I know my car "had" the AAS system on it, but I have removed all that a long time ago so my question is, can I order a BMC that does not have the AAS system and be ok like this one on RockAuto here or do I need to order a specific one.

Wanting to make sure to get the right part so I don't have to deal with returning mishaps.

(Also am I able to move the sensor in the reservoir over to a new one?)
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Old Apr 14, 2026 | 08:32 AM
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From: https://www2.mazda.com/en/100th/
yes to both. the AAS Master just adds a sensor on the bottom, and if you don't need/want that then you can just run the one without.
the ABS master is different, it has 2 brake lines instead of 3 like everything else
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Old Apr 14, 2026 | 07:39 PM
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Alright good, that's what I wanted to be sure of before ordering the part.

I know I have the three brake lines from the BMC, one left, one right and one on the bottom. (Not counting the AAS sensor spot). Appreciate the verification on that. 👍
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