TOSTEM (LIXIL) "Erenze" U5.QDJ322R (combination-lock of the sliding door) + QDJ319 (doorstop-lock of the sliding door) key replacement due to lost key

“Sliding door lock replacement due to lost key”

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This matched. These are the cylinders for U5's combination-lock of the sliding door (QDJ322R) and doorstop-lock of the sliding door (QDJ319) (there is no DN cylinder type for this type). We had it in stock, so after receiving a rough estimate, it was approved and the order was placed. Sliding doors with U5 cylinders are quite rare and I don't often come across them, but this time they had them in stock and I was able to order them right away.

We checked the parts beforehand and found that they matched, so the replacement work went smoothly, and we also checked the operation after the replacement and completed the work.

Last time I had to disassemble it because it was repaired, but this time I didn't disassemble it because it was a replacement job. To disassemble it, you will need a triangular bit driver (which I have).