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Repair guide, disassembly, and troubleshooting information for the Logitech MX Master 3S wireless mouse. Released in 2022 and identified by model number MR0077.

What kind of switches does Mx Master 3s use?

What kind of switches does this mouse use and what is their estimated number of clicks? This question is also related to side navigation buttons. In my experience these buttons typically break first.

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I used this part number "EVQ-P0D07K" to fix the failing switch in my 3s. It works as a replacement to the OEM but it has a higher operating force and a louder click.

I wish I had gone with the similar "EVQ-P0E07K" which has a lower operating force and is rated for 5M cycles rather than only 1M.

There may be other alternatives out there too.

Edit to add: this is for the left and right click, not sure what the other switches are.

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Ordered, installed, works! Thank you.

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Went with the EVQ-P0E07K myself, and tolerated my MX master 2S which has yet to have switch failure unlike the MX master 3S. The replacement switch click is much more satisfying, and seems to be working well. I replaced both left and right mouse button. Right mouse button started failing first by failing to register clicks, Left mouse button then started failing by bouncing and registering double clicks where they were not intended. Also, both were failing with drag operations, where the switch would let go prematurely.

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Quick follow-up to the OP and @dgood: does replacing the switches need soldering or can you just unscrew the old switches and replace them with the new ones?

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you need to solder it - a cheap soldering should do the work

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I just replaced my left switch with a Kailh Silent 6x6x7.3 from China, works well, is silent maybe 10% heavier to press, but acceptable. You can buy 10 of them for 2 bucks.

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Artem Kliatchkine 将永远感激不已
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