Can I make a Master Key from Valet Key? Options

[skaufmann]

I only have the original Valet key that turns the ignition. I have a 2nd key (Master) that opens the passenger door (and nothing else) and a 3rd key (Valet) that open the driver door (and nothing else).

From what I can gather, the only difference between the master key and the valet key is the channeling down the side of the key, not the notch/tooth profile. If I'm correct, can I make a copy of the original Valet key to a new Master key?

My thought is it's easier to rekey the door locks and I suspect the new Master will then work the trunk and glove box since those were not likely replaced like the door locks were.

[doug_b_928]

My car only came with a valet key. Reading on the classic thread, it seems the only difference is the valet key has an additional slot running the length of the key (that interacts with the 'valet wafer' so that it won't unlock locks that are so equipped). So, if I order a new master (black) blank and have a locksmith simply copy the profile of the valet key onto it, will the new master work in the locks for the glovebox and frunk (assuming, of course, that no one ever messed with them and that they're functional).

[ChrisFoley]

My car only came with a valet key. Reading on the classic thread, it seems the only difference is the valet key has an additional slot running the length of the key (that interacts with the 'valet wafer' so that it won't unlock locks that are so equipped). So, if I order a new master (black) blank and have a locksmith simply copy the profile of the valet key onto it, will the new master work in the locks for the glovebox and frunk (assuming, of course, that no one ever messed with them and that they're functional).

A good key shop will have suitable blanks (P05). They just won't have the black plastic handle.

The difference between master and valet keys is the vertical alignment of upper and lower "wings" of the key.
Master key wings are offset to opposite sides and valet key wings are inline.

There's a slot in one wafer of the trunk and glove box locks.
The slot aligns with the valet key wing, such that the wafer doesn't move when the key is inserted.

The wafers are numbered 1 thru 4, easily visible with a small magnifier.
The notches on the key can be measured to determine the correct number wafer which corresponds. Deeper notches are higher numbered.
When I have new keys made my locksmith doesn't need an existing key, just the 10 wafer sequence and the correct key ID. He has a programmable key machine.