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Audio, Security, & Automotive LightingTroubleshoot wiring problems and get equipment suggestions all in one place. Now expanded to include Automotive Lighting
I believe that the keyless entry is integrated into the OEM HU. Correct me if I am wrong. But I remember people having to use special harnesses or keeping their OEM decks behind the new one.
I hope that I am giving the correct info, because like I said...I am not 100% sure. My friend had a HU installed at Best Buys, and he was able to retain his keyless entry. It is for the same car. So you might want to get a second opinion or call someone at Best Buy. But then again, it never hurts to get a real alarm.