2002 Acura NSX Service Schedule & Maintenance Guide

The 2002 Acura NSX (Facelift Model) is powered by the 3.2L V6 (C32B) engine. Unlike the earlier 3.0L models, this engine features larger displacement and a six-speed manual transmission. Your car is now over 20 years old, which means time-based maintenance (rubber seals, belts, and hoses) is just as critical as mileage.

> CRITICAL ENGINE WARNING: The C32B is an interference engine that uses a timing belt (not a chain). If the belt breaks, the pistons will strike the valves, causing engine destruction. Replacement is mandatory, not optional .

Key Takeaways

• The NSX uses a timing belt (NOT a chain) on an interference engine. Replacement is required at 105,000 miles or 7 years . This is the single most critical maintenance item—failure destroys the engine.
• Canadian owners and those with short trips must follow the Severe Conditions Maintenance Schedule . The Normal schedule is only for ideal highway driving.
• Brake fluid replacement is time-sensitive, not mileage-sensitive. Independent of the maintenance schedule, replace brake fluid every 3 years .
• Transmission fluid (manual) requires replacement every 120,000 miles or 6 years . The 2002 NSX uses a 6-speed manual transmission only (no automatic option for this year).
• By age, your 2002 NSX should have had its timing belt replaced at 2009, 2016, and 2023. If history is unknown, do it immediately.
• For major periodic service, this should generally be done every 2 years or after 30,000 kilometers (approximately 18,600 miles) .

Engine & Drivetrain Specifications

The 2002 NSX represents the facelift generation with the larger displacement engine and fixed-headlight design.

Engine Architecture: The C32B features titanium connecting rods and forged pistons. Replacement engines are exceptionally rare and expensive—this makes proper maintenance financially mandatory.

Official Service Manual: The official 2002 NSX Service Manual Supplement (Part #61SW001, $100.00) is available from Helm Inc., covering the complete maintenance schedule, specifications, engine, transaxle, steering, suspension, brakes, and electrical systems .

Selecting the Correct Maintenance Schedule

The 2002 NSX Owner's Manual provides two maintenance tracks .

Severe Driving Conditions (Use This Schedule)

Select the Severe Conditions Maintenance Schedule if you regularly drive under any of these conditions :

> Canadian owners must follow the Severe Conditions Maintenance Schedule .

Service Codes Defined

The 2002 NSX Owner's Manual organizes maintenance around letter-coded service items (A, B, C, and D) :

Note: The 2002 NSX with a manual transmission does not use code D—the automatic transmission was discontinued for the US market after 2001. Manual transmission fluid replacement is covered in the major service intervals.

Factory Maintenance Schedule

The following Severe Conditions Maintenance Schedule is taken from the 2002 Owner's Manual. Service at the indicated distance or time, whichever comes first .

Independent Maintenance Requirements (Outside the Schedule)

The following requirements apply independently of the mileage schedule :

Normal Conditions Maintenance Schedule

If you do not drive under any of the "severe" conditions listed above, follow this schedule. However, for a 2002 NSX, the Severe schedule is recommended for most owners .

Timing Belt – The Most Critical Service

The C32B engine requires timing belt replacement on a strict schedule. This is the single most important maintenance item for the 2002 NSX.

Why Timing Belt Replacement Is Critical

The timing belt synchronizes the movement of the engine's valves and pistons . The C32B is an interference engine: the pistons occupy the same space as the valves at certain points. If the timing belt breaks, the pistons will strike the open valves. The result is bent valves, damaged pistons, and typically requires complete engine replacement. Replacement engine costs are astronomical (often $10,000-$20,000).

The timing belt is made of rubber, which deteriorates with time; it can dry out and crack regardless of mileage . The 2002 NSX has a 7-year replacement recommendation . For a 2002 NSX, the 7-year mark passed in 2009—meaning the belt should have been replaced multiple times by now.

> *"Those of us with the '97-03 NSX know that the recommendation is to change it every 105K miles or every 7 years, whichever comes first."* — NSX Prime

Timing Belt Quoting from the Owner's Manual

The 2002 Owner's Manual explicitly states:

> *"Replace timing belt, inspect water pump"* at the 105,000 miles or 7 years interval .

If the timing belt has never been replaced, it is drastically overdue. A 2002 NSX in 2025 is 23 years old—the belt should have been replaced at 7 years (2009), 14 years (2016), and 21 years (2023). Many NSX owners replace the belt sooner based on age: forum discussions note a dealer recommending replacement on a 2002 with only 30,000 miles due to age (10 years old at that time) . The reason is simple: rubber degrades with time, not just mileage.

Owner Guidance for Timing Belt Service (The "Full Job")

When replacing the timing belt, replace these components simultaneously:

• Timing belt itself
• Timing belt tensioner
• Water pump (driven by the timing belt; replacing together saves future labor)
• Drive belts (serpentine/accessory belt)
• Engine coolant (requires draining to replace water pump)
• Spark plugs (due at 105,000-mile service)
• Valve clearance inspection (due at 105,000-mile service)

Recommended aftermarket timing belt: Dayco Timing Belt Kit .

At 30,000 Miles – Low Mileage Concerns

If your 2002 NSX has extremely low mileage (e.g., 30,000 miles), you may still need a timing belt replacement. A forum member with a 2002 NSX at 30,000 miles was told by their Acura dealer: "Acura recommends replacement at 90,000 miles OR every six (6 years). At ten years old, I'm well past that" .

The consensus is clear: Follow the 7-year interval regardless of mileage. Rubber degradation is age-dependent, not mileage-dependent.

Engine Oil Change Guidance

Factory Requirements

How to Check Oil Level

1. Park on level ground and wait at least 3 minutes after engine shutdown
2. Pull out the dipstick (located in the mid-engine compartment)
3. Wipe completely clean, reinsert fully, then remove again
4. Oil level should be between the upper and lower marks

Owner Guidance

• Check the engine oil level each time you fill the fuel tank
• Check the engine coolant level in the reserve tank at each fuel stop
• Acura Genuine Motor Oil is recommended, though any quality synthetic of the same viscosity is acceptable
• For track-driven NSXs, many owners use slightly thicker viscosity for better high-temperature protection

Transmission Service (6-Speed Manual)

The 2002 NSX features a 6-speed manual transmission. Automatic transmission was discontinued for the US market after 2001.

Owner Guidance: The NSX 6-speed manual is legendary for its precision. Use only Honda MTF for optimal shift feel.

Clutch Fluid: The clutch fluid shares the brake fluid reservoir (manual transmission). Check the level monthly and flush with brake fluid every 3 years.

Spark Plug Replacement

Replace spark plugs during the timing belt service—the labor overlaps. Valve clearance should be inspected and adjusted at the same time .

Engine Coolant Service

Owner Guidance: Do not use generic green coolant. Honda Type 2 coolant is specifically formulated for aluminum engine components. The NSX's mid-engine layout makes the cooling system critical—maintain it meticulously.

Brake Fluid Replacement

Why it's critical: Brake fluid is hygroscopic – it absorbs moisture from the air over time. This moisture lowers the fluid's boiling point (potential brake fade under hard braking) and promotes internal corrosion of the brake system.

Owner Guidance: A complete system flush (draining old fluid from each caliper) is required. Topping off the reservoir is not sufficient.

> The 2002 Owner's Manual explicitly states: *"Replace brake fluid (independent of mileage)"* at 90,000 miles and again at 120,000 miles on the schedule . However, the 3-year time interval is the standard for time-based replacement.

Clutch Fluid: For manual transmission NSXs, the clutch hydraulic system uses the same brake fluid reservoir. Check clutch fluid level monthly and flush at the same 3-year intervals.

Drive Belt & Air Filters

Owner Guidance: The drive belts should be replaced during timing belt service since they must be removed to access the timing belt. A failed drive belt will cause loss of power steering (if equipped) and battery charging—replace at the 7-year interval with the timing belt.

Valve Clearance Inspection

Owner Guidance: The C32B uses mechanical lifters (not hydraulic). Valve clearances should be checked every major service. Tight exhaust valves can lead to burned valves—this is especially important on a high-revving engine like the NSX.

From NSX Prime owner experience: *"I found that most of my valve clearance required very little adjustment"* . However, others note: *"I would personally have them looked at yearly if you own a older one...Sometimes you wont even have to adjust them, but checking is the important part"* .

Specifications (cold engine):

• Intake: 0.15-0.19 mm (0.006-0.007 in)
• Exhaust: 0.17-0.21 mm (0.007-0.008 in)

The 2002 Owner's Manual states: *"Check and adjust valve clearance, cold engine, only if noisy"* .

Major Periodic Service

For major periodic service, this should generally be done every 2 years or after 30,000 kilometers (approximately 18,600 miles) . This comprehensive service should include:

• Full fluid inspection and replacement as needed
• Brake system inspection
• Suspension and steering component inspection
• Cooling system hose inspection
• Vacuum line inspection (critical for idle quality on the C32B)

Reset the Maintenance Light

The 2002 NSX uses a simple maintenance reminder light. After performing the required maintenance service, the indicator must be reset using the procedure in the owner's manual (typically involving the ODO/TRIP button on the instrument cluster). Consult your owner's manual for specific steps.

Monthly & Pre-Drive Checks

From the 2002 NSX Owner's Manual :

Scheduled Maintenance Summary

The table below summarizes the reference intervals for the 2002 NSX:

Long-Term Ownership Summary for the 2002 NSX

• The timing belt is not negotiable – and ensure the water pump is replaced. The C32B engine will self-destruct if the belt breaks. Replace when due (105,000 miles or 7 years, whichever comes first). For a 2002 NSX with unknown history, replace it immediately. The 2002 model uses the 7-year/105,000-mile interval .
• Brake fluid must be replaced every 3 years regardless of mileage—track this independently . The 2002 NSX has no digital Maintenance Minder for this—manual tracking required.
• Time-based maintenance matters—even if the car is driven infrequently, fluids degrade and rubber components deteriorate. A 2002 NSX is now 23 years old. Age-based replacement is critical for:
• Timing belt (should have been replaced at 2009, 2016, and 2023)
• Brake fluid (every 3 years)
• Coolant (every 5-10 years)
• Hoses and vacuum lines (rubber degrades)
• The C32B engine is unique and expensive. Replacement engines are rare and costly—$10,000-$20,000+. Preventive maintenance, especially the timing belt, is financially mandatory.
• Valve clearance should be inspected at 105,000 miles or if the engine sounds noisy . The C32B uses mechanical lifters that can go out of adjustment over time.
• Use Acura-specified fluids:
• Engine oil: SAE 5W-30
• Transmission: Honda MTF only
• Coolant: Honda Type 2 blue only
• Brake/Clutch fluid: Honda DOT 3 only
• The NSX is a hand-built exotic. For major services (timing belt, valve adjustment), find a reputable specialist with NSX experience. The official 2002 NSX Service Manual Supplement (Part #61SW001) remains available from Helm Inc. .
• Keep maintenance records. Save all receipts, especially for timing belt service. These records add significant value to this collectible vehicle.
• The 2002 Owner's Manual is the final authority. A free PDF version is available online through resources like ManualsDir and ManualShelf . The factory service manual is available from Helm Inc. .