Hi,
This may help some of you in need of duplicate keys for your 2004-2007 Gran Sport, 2007-2012 Gran Turismo, or 2004-2011 Quattroporte.
This has been covered in aspects by prior posters.
I'm simply consolidating other's advice with a procedure that works:
1) There are three independent functions to the Maserati Key of this era.
A. The mechanical key - for the key cylinder in the driver's door, the trunk (boot), and the steering column.
B. The transponder - an RFID glass capsule (embedded in the key shell) with a fixed 96-bit binary code that is transmitted to the NBC139 (Body Control Node) when polled by a transceiver wrapped around the steering column key cylinder.
Upon receiving a valid binary code (factory programmed to the car (for each key)) - the NBC enables the ECU to energize the injectors and ignition (and perhaps other funcs).
This security system comprises the "Immobilizer".
C. The 3-button Key FOB - communicates with the NBC via a binary code (modulated via ASK) on a 433.92 MHz carrier - to lock/unlock doors and trunk.
(And open or close windows and sunroof with 4 second key presses.)
The FOB appears to use an HCS rolling code - making it likely pointless to clone - more on that in a minute.
Creating a new key that will unlock and start the car requires only Attributes A and B:
For Attribute A: duplication requires an SIP22 (Fiat) blank and preferably your Mechanical Key code (but can be cut without).
(The mechanical key code is on a card that came with the Owner's Manual Kit - if you don't have one (I did not) then any Maserati Dealer will reproduce it for $10 if you prove ownership (e.g. present a copy of the Title.))
The dbl sided key-way is milled on a laser cutter (the laser is for point to point position/key-way mapping; the actual cutter is an end mill).
This is a job easily performed by a competent locksmith and costs about $20 per mechanical key. (the laser cutter is about $1.5K)
The mechanical key will turn all the cylinders - but it won't start the car (or disable the alarm).
For Attribute B: there are two options (we are concerned with Option i.)
Option i. CLONE an existing key (specifically clone its transponder) -
Due to the recent advent of some lower priced equipment - cloning the transponder is now easy and affordable.
(the real milestone making 'Option i' even possible was the reverse engineering published in 2013 of the specific encryption algorithm used in our cars (and other exotics) - journal article is attached; hint - not all 96 bits are used; sometimes only half of them)
Option ii. GENERATE a New Transponder Code and program it into the NBC (not possible without $$ equipment and expertise)
(I do not recommend using a local Locksmith for this latter operation unless they have done Maserati keys/cars of this era before - the reason being it can (and has) brick(ed) the NBC and require(d) a new NBC (and/or ECU) - at a cost of up to $8K).
For Attribute C: Cloning a useful FOB from the original is possibly pointless.
I am still investigating this - but I believe it is not possible to make a CLONE that does not negate the FOB fnc of the original.
Instead I think FOBs need to be Generated and Added - E.g. deleting all keys from the NBC and then adding (programming) back the originals and newly Generated (FOB] spare(s). (Specifically: minus specialty equipment - if one needs the FOB to work - it requires a Dealer visit to buy and add a key to NBC. Because while it is likely possible to Clone the FOB to a Blank FOB (copy the encryption seed and algorithm) I think this would render only one functioning FOB as the codes roll forward on whichever (orig or clone) is next used (making the unused FOB code unrecognized by the NBC for the next handshake).
If it works after I do it (FOB clone) - I'll post an update.
Procedure (that I used to make a spare to manually unlock and start the car (no FOB functionality (yet))):
1) Buy an Xhorse Mini Key Tool ($109 on EBay; $130 on Amazon; $120 from Xhorse)
2) Choose one of the following (I chose a. and b. and made two spares):
a. A VVDI Super Chip XT27A ($35 for ten) and a SIP22TE Key Blank ($20 cut)
b. A Maserati 3 button Flip Key - with FOB, key blank, and ID48 Transponder capsule ($55-75 on Amzn; $50 on EBay)
(note: this era Maserati uses the Megamos Crypto ID48 Transponder and the T48 subtype - don't worry - a different subtype does not appear to prevent a valid write - and the Blank Super Chip appears to clone all of the variations T6, T33, T48, -A , -K, ...).
c. An Xhorse (or equivalent) flip key with a SIP22 blank and a Super Chip
3) Get the blank key cut at a locksmith
4) Download the Xhorse app to your Android or IPhone; create an account
5) Connect via BT to the Mini Key Tool; update its firmware
6) Sit in your car
7) Select Transponder Clone from the App Menu; insert original Key; read Key - it will return a HEX ID and say Locked and Cloneable
8) Tap 'Clone'
9) Place the new key/transponder (what you selected (a,b,c) above) in the Mini tool - it will confirm that it is Writeable
10) Place the Mini tool near the ignition cylinder - then with the Original Key turn the ignition On then Off a total of 8 times - removing and reinserting the key each time - this is called Sniffing.
11) The App will take the sniffed data and upload it to a server that will crack the 96-bit binary code (takes about 2 minutes).
12) You will then be instructed to place the blank into the Mini and it will write the Transponder code and Lock it.
13) You now have a spare key. Total cost - about $155-200 for the first key (this includes the price of the $120 Mini tool) and ~$30 per key thereafter - and you can do all your friends cars - and your other cars (the Mini tool will clone or generate a variety of keys - including Smartkeys).
Note: If the car is locked and you lose your key - deploying the spare into the door cylinder will trigger the alarm.
No worries - as soon as you place the key in the ignition and turn it On - the alarm will be deactivated.
It will briefly display a warning that a 'break in was detected' then clear itself.
Hope this helps,
Mark