Troubleshooting Thule Cargo Box Key Turning But Not Engaging Lock On Box
Updated 02/28/2026 | Published 08/28/2023
Question:
I just picked up a used Thule cargo box and it didnt have keys. so I ordered new keys, The keys work on one side but not the other. The keys turns in the lock but wont engage the 3 locking pins on the inside it just stays unlocked. I sprayed them with 3n1 lock oil. It helped with the key sticking but thats it
asked by: Nick
Expert Reply:
It sounds like you may either need a new lock core or the latch needs to be changed out. We do have the Thule One-Key System # TH450200 which contains 2 new lock cores for both sides of your cargo box with matching keys. A Change Key # 853-1251 can be used to move your current lock core from one side to the other to determine if the issue is with the core or with the latch itself. If you can tell me what cargo box you have I can verify if a replacement latch is available.
Product Page this Question was Asked From
Thule One-Key System Lock Cylinders - Qty 2
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Ariana C.
2/27/2026
This happened to me. I tried changed the lock but it just keeps spinning. Do they sell a replacement for ascent 1700?