1999 HONDA NSX NA1

Typical onset: 80,000-150,000 mi

Symptoms: Cold-start ticking that may or may not disappear when warm, Valve train noise most prominent on cylinder bank closest to firewall, Check engine light with misfire codes in severe cases, Loss of power if VTEC engagement is affected

Fix: Replace affected lifters (often do all 24 preventively). Requires cylinder head removal on the affected bank. 12-16 hours labor per bank. OEM lifters strongly recommended—aftermarket failures are common. Often combined with timing belt service if due.

Estimated cost: $3,500-6,500

Typical onset: 90,000+ mi or 7+ years

Symptoms: No symptoms until catastrophic failure, Interference engine—bent valves guaranteed if belt snaps, Water pump bearing noise (whirring/grinding) if pump is failing

Fix: Replace timing belt, tensioner, water pump, and all accessory belts every 90k/6 years minimum. Engine-out service is recommended but not mandatory—in-chassis possible with experience. 8-12 hours in-chassis, 14-18 hours engine-out. Use OEM Honda or Aisin components only.

Estimated cost: $2,000-4,000

Symptoms: Applies only to 1991-1992 models with specific VIN ranges—most 1999s are clear, Sudden loss of all gears—snap ring breaks, countershaft walks out, Metallic grinding before total failure, Reverse may go first

Fix: Verify VIN is outside snap ring range (Honda service bulletin). If affected and not previously fixed, transmission must be removed and snap ring/countershaft replaced preventively. 10-14 hours labor. This is NOT a 1999 issue unless engine/trans were swapped from early car.

Estimated cost: $3,000-5,000

Typical onset: 100,000+ mi

Symptoms: A/C or heater only blows from defrost vents, No air from center/side vents regardless of mode selected, Clicking noise from behind center console when changing HVAC settings, Intermittent operation that worsens over time

Fix: Climate control unit servo motors fail (plastic gears strip). Requires removal of center console and HVAC unit. Repair services available (HeelToeAuto, others) for $400-800. OEM replacement units are NLA. 4-6 hours labor for R&R plus repair service turnaround time.

Estimated cost: $800-1,500

Typical onset: 60,000+ mi

Symptoms: Windows move very slowly, especially in cold weather, Window drops slightly when door closes (normal) but won't re-close automatically, Complete failure to move—motor runs but window doesn't budge

Fix: Window regulators use plastic sliders that wear and bind. Clean and re-grease existing mechanism first (2 hours per door). If broken, aftermarket regulators available but OEM quality preferred. Motors rarely fail—it's the mechanical components.

Estimated cost: $400-900

Typical onset: 120,000+ mi

Symptoms: ABS warning light steady on dash, No ABS function—wheels lock under hard braking, TCS light may also illuminate (if equipped), Normal braking unaffected but no electronic assistance

Fix: ABS modulator internal seals fail. Units can be rebuilt by specialists (Module Master, BBA Reman) for $500-900 plus shipping. Installation is straightforward but requires brake system bleeding. 3-4 hours labor. Dealer replacement NLA or $3,000+ if found used.

Estimated cost: $900-1,800

Typical onset: 100,000+ mi

Symptoms: Clutch pedal slowly sinks to floor when held down, Difficulty shifting into gear, especially reverse, Fluid leak visible at firewall or near transmission bellhousing, Pedal feels spongy or has excessive travel

Fix: Replace both master and slave cylinder as a pair—if one fails, the other is close behind. Bleed system thoroughly. 3-5 hours labor. OEM Honda parts recommended—aftermarket cylinders often fail within a year.

Estimated cost: $600-1,200