Copy and paste “grohe 41131275” into your search engine.
I did and came up with dozens of cartridges that look to match the one in your picture. One example is Here. The exact part numbers may not match, however often the manufacturer will change a part number to reflect the year and month of manufacture.
You will have to do your own comparison shopping. Or take the cartridge to a plumbing supply store and they will match it up.
Answer from RMDman on Stack Exchangeplumbing - Grohe shower valve - cartridge replacement, need help identifying replacement part - Home Improvement Stack Exchange
How do I get access to the cartridge of the GROHE kitchen faucet? No apparent way to untie the lever cap.
Grohe 46048 replacement cartridges keep leaking, what to do?
Grohe Faucet Cartridge Replacement
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There usually is a hole in the front or back of the cap, but not this one. No idea how to remove the lever and access the cartridge. Model seems to be “A112” but not sure.
Hi—My kitchen sink faucet has a loose handle, so I ordered an OEM Grohe replacement cartridge for it on Amazon. I cleaned up the mating surfaces on the faucet body, I was careful to make sure it was seated well and I alternated sides when screwing it on, but it started dripping immediately. I did a return/exchange and the next one seemed OK, until 2 days later when it started leaking even worse than the last one! The old one is still OK, it doesn’t leak, but the handle is still loose and I’m afraid a person or cat might accidentally turn it on.
Am I doing something wrong? Are Grohe parts usually this unreliable? What should I do about the cabinet area under the sink now that it’s had a puddle of water on it a few times?
What should I do?