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Hi,
I'm in need to replace a pair of TSB81BA3 (that are gone cause improper plug connection.....), but with my complete ignorance about... I see now I can only buy updated versions, like the TSB81BA3d and TSB81BA3e.
My original one is a TSB81BA3 with a G4 on it (see photo here)
Can I change it with a newer version? The G4 code stands for? They have a memory or need to be programmed?