The red tab is a one-time deal. You need to purchase a new red tab to get the cap back on. It gets broken in the removal and you need a new one to resecure the cap.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record