I don't have the owners manuel. How can I find the passkey for my BlueTooth?

To use your Bluetooth® wireless technology enabled phone in your vehicle, an initial one-time-only pairing procedure is required. To pair your phone, initiate Bluetooth® search mode in the vehicle. Then depending on the handset, initiate search mode or discoverable mode.* Once the vehicle finds the handset, a Bluetooth passkey is required to complete the pairing procedure.

You may choose any combination of 4 to 16 digits. Enter the passkey on the phone or vehicle, as prompted, and then the other device will ask you to verify it.

If it really is a 2006 or earlier year 335i Coup?, you need the vehicle's Owner's Manual. Since: "Vehicles require a fixed Bluetooth passkey for verification which is included in the vehicle's Owner's Manual."

You can obtain the manual from the dealer, when you provide them with your vehicles VIN-code, for a price of course.

From the BMW USA site:
Bluetooth FAQs

We do not have this information. Contact the dealer for help.

Owners Manual - Buy One @ Helm.Com

Relay number 301.

Passkey default for bluetooth is 0000

The number was on a white card stuck in with the manual binder. Or if you don't have it, its located in the trunk, behind the left nav access panel on a silver "TCU" module about the size of 2 vhs tapes stacked together. if you look at the eject button on the nav player its located just to the right and is installed on about a 45 degree angle.

there is a white lable with the "PK" on it. i used a small telescoping mirror but you can also slightly pull back the trunk liner above the unit and it will be easily located. If any of this options works go to Bmw dealer for service and we found it in car computer.

The stock passkeys usualy will work 0000 1234. check in the manual it should show you the options but try thoes or 00000 12345 or just leaving it blank will work with some models.

read the manual

I have the same car. The dealership wanted to charge me $155 to go into the computer and give me the passkey.

One of the techs just told me how to find it myself:

Inside the trunk, on the left side behind the DVD player, there is a box that sits at a 45 degree angle. Right above that box, there is a box that is shaped like a VHS tape. Unscrew that box and on the other side you will see bluetooth PK: and your four digit number.

That saved me $155 dollars and now I can talk hands free through my car.

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