If you didn't get two keys with the car and you need or want a second key, you might want to have the new key programmed to the ECU and immobilizer at the same time as the new cluster. Otherwise, you'll be back at the dealer again in two weeks.
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1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor