The last model year of the diablo roadster is 1999. Some Millennium editions were sold in the year 2000 but still are MY 1999.

Take a look at your VIN. You will probably have the letter X for digit 10.

And for reference, below is my handy dandy vin decoder:

-mick


Lamborghini VIN Decoder

Lamborghini VINs: Automobili Lamborghini has used two distinct 17 character VIN sequences. The original VIN sequence assumed that no more than "500" cars would be produced per model per year. In mid year 2003, in anticipation of the Gallardo, a new VIN sequence was introduced.

Preface: VIN digits 1, 2 and 3 typically contain a WMI (World Manufactures Index) code. Digit 1 defines a world region (like Europe), digit 2 defines a country within that world region (like Italy), and digit 3 defines a manufacturer located in that country. Since the 3rd digit alone is normally insufficient to cover all the manufactures located in one country, multiple country codes can been assigned to any one country. The critical exception to the digits 1, 2 and 3 being a complete WMI code is when digit 3 is a 9 (nine). Digit 3 being a 9 indicates a "small manufacturer" and that a WMI subcode is to be found at VIN digits 12, 13 and 14 which will indicate the manufacturer.

Pre mid 2003 Lamborghini VIN:

Digit 1 = "Z" (Europe)

Digit 2 = "A" (Italy)

Digit 3 = "9" (Small manufacturer) - See digits 12->14 for WMI subcode

Digit 4 = Model (C=Countach, D=Diablo, J=Jalpa, L=LM002, R=Diablo Roadster, B=Murci)

Digit 5 = Market (C=Canada **, E=Europe, U=USA, 0=other, A=North America, etc) ** See Market Note **

Digit 6 = Body (0=Coupe, 1=VT Coupe, 2=2wd Coupe, 3=Roadster, 4=SUV)

Digit 7 = Engine (0=3.5v8, 5=5.5v12, 7=5.7v12, 2=5.7v12VVT, 1=v12VVT, 0=6.2v12)

Digit 8 = Features (B=Passenger Airbag, P=Passive Restraints, A=Active Restraints, U=USA, E=Europe, etc)

Digit 9 = North American VIN Check Digit

Digit 10 = Model Year (eg A=1980, Y=2000, 1=2001, etc)

Digit 11 = Plant (L=Sant'Agata Bolognese - Bologna Italia)

Digits 12, 13 and 14 = WMI Subcode "A12" = Automobili Lamborghini

Digits 15, 16 and 17 = Serial Number (clarified by digit 4 "model" and digit 10 "Model Year")


Post mid 2003 Lamborghini VIN:

Digit 1 = "Z" (Europe)

Digit 2 = "H" (Italy)

Digit 3 = "W" (Automobili Lamborghini)

Digit 4 = Model (B=Murci, G=Gallardo)

Digit 5 = Market (C=Canada, E=Europe, U=USA etc)

Digit 6 = Body (1=Coupe, 2=Roadster/Spyder, 3=LP640 Coupe, 4=LP640 Roadster)

Digit 7 = Engine (1=500HPv10, 2=520HPv10, 6=6.2v12, 7=6.5v12)

Digit 8 = Features (M=6sp, N=low ratio 6sp, S=egear, T=low ratio egear)

Digit 9 = North American VIN Check Digit

Digit 10 = Model Year (eg 3=2003, etc)

Digit 11 = Plant (L=Sant'Agata Bolognese - Bologna Italia)

Digits 12, 13, 14, 15, 16 and 17 = Serial Number (clarified by digit 4 "model")


General Notes: Letters I, O and Q are invalid in a VIN; Letters U and Z and digit 0 are invalid for Model Year.

Market Note: It appears that all pre mid 2003 Murcielago's report C for digit 5 with actual market being in digit 8.