Changes by year

From the wayback link posted above:

Changes for 1991​

  • First model year for the car
  • Engine model number is C30A


Changes for 1992​

  • New Color: Grand Prix White


Changes for 1993​

  • Added cup holder to center console; console cover got two separate openings.
  • Added Passenger Side Air Bag
  • Changed Rear Alignment to 2mm less toe-in to improve tire wear
  • As a result of passenger air bag, drastically reduced size of glove box.
  • Reconfigured center console (gives you the illusion you have more space but not really).
  • Improved warranty coverage from three years or 36,000 miles to four years or 45,000 miles
  • Switched A/C system from CFC-based R12 to ozone-friendly R134A


Changes for 1994​

  • New Color: Brooklands Green Pearl
  • Keyed roof color to body color in late-year green cars (first 9 greens were with black roof). The last green with a black roof is 0031. 0032 (and all others) has a green roof.
  • Dropped Color: Sebring Silver
  • New Interior Color: Tan
  • Dropped Interior Color: Ivory
  • Removed "DOHC VTEC badge" on center console cover
  • Changed wheel design from 5-spoke to 7-spoke
  • New wheel color: Solaris Silver, paint code NH-536M (a gunmetal gray color)
  • Increased Tire and Wheel Sizes to 215ZR45/16 on 16 x 7" Front and 245ZR40/17 on 17 x 8.5" Rear
  • Gear cut method changed to reduce gear noise
  • Color-keyed the rear wall of the interior tan for tan interior cars (previously black on ivory interiors).

Changes for 1995​

  • Added targa top version: the NSX-T
  • Only -Ts were avilable in 1995 in the US; coupes were unavailable.
  • Roofs now all body colored
  • New color: Midnight Pearl
  • Not Available in '95: Grand Prix White
  • Black interior changed from interior code E to code J. It's a little lighter.. a dark charcoal color.
  • Different Exhaust Tips
  • Sportshift "Tiptronic-style" shifting for Automatics
  • Power Steering becomes standard for Manuals as well as Automatics
  • Changed gearing of 2nd gear in Manual Transmission
  • Modified airflow to brakes to improve cooling
  • Traction Control Light no longer shines green when activated, still shines yellow when inactive
  • Throttle-By-Wire
  • OBD-II
  • Limited Slip Differential Changes on manual transmission cars. Went from Torque Control Ddifferential to a Torque Reactive Differential - when combined with Throttle-By-Wire, increases speeds out of a corner by 10%. Automatic cars keep old differential.
  • Bumper reinforcements were changed to extruded aluminum instead of the stamped steel
  • Approx. 100 lbs heaver than 1991/1992 models due to reinforcements for targa top, including: The base of the B pillar where it joins the rocker panel, larger rear bulkhead crossbar, thicker trunk leading edge panel, a redesigned and thicker-walled rear roof section, a redesigned front roof rail section, additional rib in the center rear bulkhead section, a completely redesigned and thicker upper A-pillar. There's also a redesigned and thicker upper dashboard cross member and a redesigned front lower floor section. The extruded aluminum side sills were extensively reinforced - wall thickness of the vertical center web of the 5-sided extrusion went from 2mm to 6mm.

Changes for 1996​

  • Grand Prix White available again
  • Coupes were available again, though from this point on they were special-order only.


Changes for 1997​

  • Three new colors: Kaiser Silver, Monte Carlo Blue, Spa Yellow
  • Dropped colors: Brooklands Green Pearl, Midnight Pearl
  • Coupes can be special ordered with either a black top or a body color top; -Ts still have body colored roofs
  • New wheel color on all wheels: Blades Silver (a bright machined/brushed looking finish)
  • Larger front and rear brake rotor diameters and rotor thickness. The bracket and the rotors are the major change
  • Front caliper pistons went from 40mm and 36mm to 40mm and 34mm.
  • Larger engine displacement (bore increased from 90mm to 93mm) from 3.0L to 3.2L on manual transmission cars. Model number for new engine is C32B1.
  • Horse power increase from 270 hp to 290 hp and torque increase from 210 lbs-ft to 224 lbs-ft (manual tranny)
  • Different exhaust manifolds, now stainless steel and free breathing
  • Different cylinder linings, fiber reinforced (FRM)
  • Larger intake valves, 36mm
  • Different head gaskets
  • Larger connecting rod bearings
  • Increase of piston pin diameter from 22mm to 23mm
  • Numerous emission control system changes
  • Six speed manual transmission
  • Double synchros on 3rd and 4th gears (A61)
  • Lockout of reverse gear above 12mph
  • Dual-disc clutch changed to a single disc clutch
  • Dual mass flywheel
  • Larger diameter spare tire to clear new brakes
  • Stronger, thinner aluminum body panels
  • Heat absorbing glass instead of bronze glass
  • Immobilizer anti-theft system with coded key using an electronic transponder. No more all-metal keys.
  • Ignition switch light went away to make room for the immobilizer antenna.
  • Improved NVH (Noise Vibration and Harshness)
  • The final gear ratio does not change, so 6th gear in the 1997 NSX results in 6.9% higher vehicle speed than 5th gear in the 1996 model.
  • New aluminum alloy in selected body areas to reduce weight and increase rigidity
  • Larger spare tire size (from 15 in to 16 in diameter)
  • Refined electronic power steering control
  • Revised shape of the front spoiler
  • Refined ABS braking system
  • Improved Traction Control System (TCS) with new control logic
1997 Prices (MSRP)

  • Coupe 4-speed Automatic or 6-speed Manual $84,000 + destination and handling $725.00
  • NSX-T 4-speed Automatic or 6-speed Manual $88,000 + destination and handling $725.00

Changes for 1998​

  • No official changes, though throttle computer was changed.
1998 Prices (MSRP)

  • Coupe 4-speed Automatic or 6-speed Manual $84,000
  • NSX-T 4-speed Automatic or 6-speed Manual $88,000


Changes for 1999​

  • Limited production Zanardi Signature NSX available
1999 Prices (MSRP)

  • Alex Zanardi Edition NSX 6-speed Manual $84,000 + destination and handling $745.00
  • Coupe 4-speed Automatic or 6-speed Manual $84,000 + destination and handling $745.00
  • NSX-T 4-speed Automatic or 6-speed Manual $88,000 + destination and handling $745.00


Changes for 2000​

  • Discontinued colors: Kaiser Silver, Monte Carlo Blue Pearl, Formula Red
  • Introduced colors: Silverstone Metallic (slightly lighter than Kaiser Silver, darker than Sebring Silver), Monaco Blue Pearl (slightly lighter than Monte Carlo Blue Pearl), New Formula Red (slightly darker than Formula Red)
  • Seats, door insets, and steering wheel get perforated leather (not perforated suede like the Zanardi edition)
  • Improved anti-lock brake system (ABS) (computer software change)
  • Improved manual transmission shifting
  • Acura "A" logo marks on wheel centers
  • Added onboard fueling vapor recovery system
  • Engine now meets Low Emission Vehicle (LEV) standard
  • No scheduled tuneups for 100,000 miles
2000 Prices (MSRP) and Info

  • 4 Year / 50,000 Mile Warranty


Changes for 2001​

Changes for 2002​

  • New Colors: Long Beach Blue Pearl, Imola Orange Pearl
  • Discontinued Colors: Monaco Blue Pearl
  • Added Interior Colors - Available with matching exterior color only: Yellow, Silver, Blue, Orange, White. Red is available with both red and black exterior.
  • New interior trim color: Aluminum Color (Center console, door inserts, and Gauge Cluster Bezel).
  • White stitching used on interior dash
  • Steering turns lock-to-lock up to 3.24 from 3.07
  • Wheel sizes changed to 17 x 7" front and 17 x 9" rear.
  • Tire sizes changed to 215/40ZR/17 front and 255/40ZR/17 Rear
  • Rear track increased 1/2" from 60.2" to 60.7"
  • Yokohama A022 no longer OEM tire - Bridgestone Potenza RE050 H0 replaced RE010 as new OEM tire
  • Appearance updated - Fixed HID headlights, new front, new lip on trunk, new ground effects beneath doors, black mesh vents (changed from ribbed)
  • Coupe option discontinued in the U.S. (available elsewhere)
Press release from Honda before 2002 model introduction:

  • The NSX has earned its status as one of the world's premier exotic sports cars with a combination of head turning performance and contemporary styling. For 2002, the NSX's styling has been updated to modernize its look and its chassis was refined to ensure its competitiveness as a true world class sports car. The NSX features all-aluminum construction and is powered by an advanced 290 horsepower DOHC, VTEC, V-6 engine coupled to a 6-speed close-ratio manual transmission. When equipped with the optional 4-speed automatic transmission with Sequential SportShift(TM), the NSX engine generates 252 horsepower.
2002 NSX Color Card for US

2002colors.jpg (46560 bytes)

Changes for 2003​

  • Rear sway bar size increased from: 17.5 mm to 19.1 mm. Wall thickness remains at 2.3 mm

Changes for 2004​

  • US Colors: Long Beach Blue Pearl, New Imola Orange Pearl, Grand Prix White, New Formula Red, Rio Yellow Pearl, Silverstone Metallic, and Berlina Black. Each of these colors can be matched to a corresponding interior color for a personalized look or ordered with a conventional tan or black leather interior.
  • Now standard equipment instead of options: Keyless entry, CD changer in trunk
  • Redesigned shift knob
  • Removal of passenger side power door lock switch.
  • Gauge Cluster bezel color change: from "Aluminum" to dark gray.
  • CD changer now MP3 compatible.
  • MSRP $89,000 + destination and handling $745.00
  • Center console and door trim color changed to brighter shade of silver.
  • Factory alarm now gives audible *beep* when activated via key FOB (second time button depressed)

Changes for 2005​

  • Manual transmission/double synchros added to 5th and 6th gears (E61)
  • "NSX" emblem on door handle color changed to silver [to be confirmed - 2002 change?]
 
Honcho -
Much though I would love a '99 Zanardi, probably not happening! (But thanks DocJohn!) Back to the high water mark. For '97 let's not forget the larger intake valves. "Stronger, thinner aluminum" - I want to know more. You can't change physics, and I'm sure the previous alloy was cold-worked to the nines during the stamping processes. The alloy was changed, but to what, and from what? How thick was the sheet stock before this change and after? Another mystery - "Improved Noise Vibration and Harshness". I would love to know exactly what was done where to get this. Another big one - "New aluminum alloy in selected areas to reduce weight and increase rigidity". So, they change the alloy on existing parts or made new parts to increase rigidity? Adding new parts doesn't exactly reduce weight, of course. After they did the finite element analysis once Ayrton Senna said basically that the car was too floppy, did they re-do this again to increase rigidity? Hmm, I wish I was a Honda engineer in those days! PS - I don't even own an NSX, but I am planning to, and I'm just in the "wisdom-gathering" stage that I always do before buying a new-to-me car.
- Rob
You can't change physics? Why would you even say that? Aluminum alloys are improving ever decade. Stronger alloys are developed, new processes are developed. Things get lighter and stronger without any dishonesty or cheating physics.
 
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