1990-1996 Feature Changes

Given the huge range of options available available over 8 years, which have also varied by country, its difficult to specify all the changes which have been made over the years. Some changes have been quite subtle, such as the change in the type of knob used on the electric seat (stronger and less prone to breaking and jamming). Others such as an additional washer bottle reservoir installed in the rear for the rear windscreen washer, have been installed in very limited production runs. Presently you can buy a version "S" and a version "R" in Japan. These come with different wheel rims, Recaro seats etc. GPS (global positioning system) is also offered as a factory option in Japan. Some items which are options in one country are standard in others, and vice versa.

Here is a feature change list which covers the most of the main changes for the Twin Turbo and non turbo, US versions.
1990: non turbo begins production in Spring '89 -- TT begins in the Fall. Extended model year sales: 39,290

1991: Manual climate controls discontinued (but used on future convertible). New electronic climate controls allowing control over air flow direction, but no more ambient temp gauge. Air Conditioner evaporator valve changed from aluminium to steel to quiet it.

Nissan hamburger logo put on nose of car.
Driver's air bag optional
Front non turbo rotors -Overall thickness 26mm were changed to TT units- overall thickness 30mm.
CD Player option added for both TT and NA. Previously only available in NA. Bose stereo head-unit changed (new unit has fader/balance controls). 5-Speaker Bose system discontinued. Logo on floor mats changed from "300ZX" to simply "Z". Hardtop coupe available at mid-year (NA only).
Brake master cylinder changed to new unit in Feb. 1991.
Sales: 17,652

1992: Driver's air bag made standard.
Dash/door complimentary material changed from fabric to 'Alcantara'(synthetic suede).
Separate mirror heater switch eliminated (combined with rear defroster switch)
Mirror heaters made standard.
Power-adjustable driver's seat standard on t-top. Door lock mechanisms changed such that you no longer had to hold the door handle up when closing the door.
Power locks made fully synchronous (the passenger switch can control the driver's lock)
Sales: 6,708

1993: Turbo oil line insulation changed for better heat dissipation.
Convertible option added (only avail. with manual climate controls).
Brake calliper material changed from aluminium to iron to help warping/shimmy problems.
AIV/reed valves removed. (Source: JWT -- unconfirmed)
Sales: 11,599

1994: Rear spoiler design changed to a higher/bigger pedestal unit, increasing drag coefficient slightly.
Super HICAS system changed to an electrically-actuated unit (previously oil pressure actuated).
Seat belts redesigned. Moved from door-mounts to true pillar-mounts.
Passenger air bag made standard.
Keyless entry added.
Titanium keys discontinued in Nov. 1994.
Off-white 'Pearl' colour is dropped. Future 'pearls' are more of a semi-metallic white.
Upgraded Bose stereo made standard (may have happened in '95).
Convertible gets standard power passenger seat.
Front fascia becomes body-colored instead of grey strip.
Keyhole light eliminated.
Sales: 5,320

1995: Body colored front-bumper facia and roof rail for the convertible
Special 25th Anniversary gold paint available.
Bose stereo head-unit changed again. New unit has Scan function, pixelated display, and better bass sound quality.
'Reset' button removed from dash clock (may have happened in '94).
Sales: 3,135

1996: Variable cam timing 'quietly' dropped due to smog regulations,
reducing 5-speed engine output to 280HP. Different cams installed. OBD II electronics introduced.
Driver's seat back rest no longer includes adjustable side bolsters(also true on some '95 models).
"Special Edition" Sales: 30