How to differentiate whether head unit/stereo has trip computer for purchase

[floating_weasel]

Just wondering if folks round here know the part number for a
Mazda 3 stereo/head unit with the trip computer. (2007 Mazda 3 hatch)
1CD or 6CD I don't really care about, nor do I have the bose.

I have found many units on Ebay but most don't have the trip computer.
However, I have found a few that don't specify but do have model numbers.

Is there a way to look visually or is there a model number that differentiates it
from the head unit without the trip computer ?

The model I am looking to check out is 14798188
Part # is BAP5-66-aro

[floating_weasel]

Ok, went and picked up a new head unit. Guy at wrecking yard says I will have to get it unlocked at a dealership for an additional rape fee. Lovely. Any idea how I might go about doing this on my own ? Is it even possible ? I am pretty sure I have the VIN number the thing came out of. It was not a shady place, and in fact was freakin huge. I guess the first thing I should do is hook it up and see if I indeed have to "unlock" it. My car is a 2007 Hatch, and the unit says it was manufactured in 2006.

[cwp_sedan]

Huh? Never heard of unlocking headunits except for GM vehicles. I don't think you'll have a problem.

[stevenma188]

http://www.mazda3club.com/showthread.php?t=44448

I think you are thinking of this. I'm not sure if this will work for your HU.

[floating_weasel]

Ok, guy at auto yard was full of crap. Stereo worked fine, no unlocking needed. However, the trip computer did not work until I did the double button trick. Thanks a ton Stevenma188 ! Muchos Kudos. It saved a lot of cursing. Lights on stereo are working again, CD player is working again, I am a happy camper. I paid $155 for the unit which is a bit much, but it was close, and had what I needed, and it has brought me joy, so no worries. It was also better than the $450 Mazda wanted to charge just for the fascia of the stereo and not even a new CD player or radio. HOLY CRAP ARE YOU KIDDING ME ???!!!! What drugs have you been smoking that I would pay that much for a stock deck. How do they sleep at night ?

If anyone has three wire harnesses at the back of their stereo but doesn't have a trip computer function, they should try the trick that Stevenma188 posted. I knew of it but didn't have the specifics and it worked like a charm at getting my trip computer back.