2020 ACURA NSX

Typical onset: 20,000-50,000 mi

Symptoms: Metallic knocking or rattling from engine bay, especially under load, Low oil pressure warning on startup or hard acceleration, Metal shavings in oil during changes, Sudden loss of power followed by engine seizure

Fix: Complete engine rebuild or short block replacement required. 40-60 hours labor due to hybrid component removal and mid-engine access complexity. This is a known defect tied to bearing clearance tolerances and oil starvation during track use or aggressive driving. Some early VINs have TSBs but no recall yet.

Estimated cost: $25,000-45,000

Symptoms: Engine stumbling or stalling at idle or low RPM, Difficulty starting, long cranks before fire, Limp mode activation, check engine light with fuel pressure codes, Complete no-start condition

Fix: Denso fuel pump impeller defect causes fuel starvation. Recall replacement takes 3-4 hours due to mid-engine fuel tank access requiring rear clamshell and undertray removal. Some dealers have had multi-month backorders on parts.

Estimated cost: $0 (recall) or $1,800-2,500 if out of warranty

Typical onset: 30,000-70,000 mi

Symptoms: Transmission fluid puddles under rear of vehicle, Burning smell after spirited driving, Transmission overheat warnings on track or mountain passes, Harsh shifting or delayed engagement when hot

Fix: O-ring failures at hard line junctions near underbody cooler. Lines are dealer-only parts. Requires 6-8 hours labor for full rear clamshell removal to access. Cannot be band-aided — full line replacement required.

Estimated cost: $2,200-3,800

Typical onset: 40,000-80,000 mi

Symptoms: Excessive clunking during gear changes or hard launches, Vibration through cabin at idle in Drive, Visible fluid leak from rear engine bay mount area, Drivetrain alignment symptoms (driveshaft vibration)

Fix: Hydraulic transmission mount collapses internally, allowing excessive powertrain movement. Mount is $800-1,200 dealer part. Replacement requires transmission drop or partial subframe lowering — 8-12 hours labor. Often discovered during other rear-end work.

Estimated cost: $3,500-5,500

Symptoms: Loss of AWD functionality, front motors disengage, Check hybrid system warning, reduced power mode, Inverter cooling fan runs constantly even when cold, Repeated fault codes for front motor control units

Fix: Inverter cooling system airflow blockage or coolant pump failure causes thermal shutdown. Diagnosis requires Honda HDS scan tool. Inverter replacement (if fried) is 12-16 hours labor plus $6,000-8,000 in parts. Cooling pump alone is 4-6 hours and $1,500-2,000.

Estimated cost: $2,000-3,000 (pump) or $10,000-15,000 (inverter)

Typical onset: 60,000-100,000 mi

Symptoms: Reduced electric-only range (normal is ~2 miles), More frequent engine starts during light driving, Battery state-of-charge display never reaches full bars, Reduced Sport/Sport+ mode performance feel

Fix: Lithium-ion pack loses 20-30% capacity over time, especially in hot climates. Pack replacement is $8,000-12,000 in parts alone, 10-14 hours labor. Not typically done unless completely failed. Does not strand you, just reduces hybrid assist efficiency.

Estimated cost: $12,000-18,000