ACURA NSX 2021 Owners Manual
Page 431 of 494
Continued429
uuCleaning uExterior Care
Maintenance
The inside lenses of exterior lights (headlig hts, brake lights, etc.) may fog temporarily 
if you have driven in the rain. Dew condensation also may build up inside the lenses 
when there is a significant enough differe nce between the ambient and inside lens 
temperatures (similar to vehicle windows fogging up in rainy conditions). These 
conditions are natural processes, not structural design problems in the exterior 
lights.
Lens design characteristics ma y result in moisture developing on the light lens frame 
surfaces. This also is not a malfunction.
However, if you see large amounts of wa ter accumulation, or large water drops 
building up inside the lenses, have your vehicle inspected by an authorized Acura 
NSX dealer.
Keep brake pads and rotors free of substances  that are either abrasive or oil based, 
as these substances can reduce brake system performance.
NSX brake pads and disks have a high meta llic content. Under certain conditions 
these pad and disks may rust to varying degrees, which may cause a clunk noise or 
rubbing sound if parked when brakes become wet. This is normal for brakes with 
high friction pads and it does not affect operation of the brakes.
To prevent the iron contained in the brake pa ds and rotors from rusting and sticking, 
brakes should be dried before parking the ve hicle after driving on wet roads or after 
washing the vehicle (especially  before long-term storage). To dry the brake pads and 
rotors, drive the vehicle at a low sp eed and apply the brakes several times.
By regularly applying str ong pressure to the brakes, you can reduce corrosion 
buildup on the brake pads and rotors.
■Fogged Exterior Light Lenses
■Cast Iron Brakes*
1 Brake Maintenance
Brake maintenance require s specialized knowledge. 
We recommend maintenance to  be carried out by an 
authorized Acura NSX dealer.
1 Maintenance of Brake Surfaces
Brakes can be dried by driv ing on a dry road for few 
miles/kilometers, and a pplying the brake pedal 
normally, based on traffic  and road conditions. These 
steps help maintain br ake system performance.
* Not available on all models
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uuCleaning uExterior Care
430
Maintenance
Keep the brake pads and rotors free of subs tances that are either abrasive or oil 
based, as these substances can reduce braking power. After driving in the presence 
of salt and/or sand, briefly wash the ro tor/pad surfaces with low-pressure water, 
then allow the brake system to dry. To  dry the brake pads and rotors, drive the 
vehicle at a low speed and apply the brakes several times.
Refer to the color code label and the temperature notice label affixed to the 
underside of the hood before painting the vehicle.
■Carbon Ceramic Brakes*
■Painting the Vehicle
1 Painting the Vehicle
U.S. models
Canadian models
* Not available on all models
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431
Maintenance
Accessories and Modifications
Accessories
When installing accessories, check the following:
• Do not install accessories on the windsh ield. They can obstruct your view and 
delay your reaction to driving conditions.
• Do not install any accessories over areas marked  SRS AIRBAG, on the sides or 
backs of the seats, on front or side  pillars, or near the side windows.
Accessories installed in these areas may  interfere with proper operation of the 
vehicle’s airbags or may be propelled into you or another occupant if the airbags 
deploy.
• Be sure electronic accessories do not overload  electrical circuits or interfere with 
proper operation of your vehicle.
2 Fuses  P. 461
•Before installing any electronic accessory, have the installer contact an authorized 
Acura NSX dealer for assistance. If possibl e, have an authorized Acura NSX dealer 
inspect the final installation.
1 Accessories and Modifications
Acura Genuine accessori es are recommended to 
ensure proper operati on on your vehicle.
3WARNING
Improper accessories or modifications can 
affect your vehicle’s handling, stability, and 
performance, and cause a crash in which 
you can be seriously hurt or killed.
Follow all instruction s in this owner’s 
manual regarding accessories and 
modifications.
3WARNING
Use of improperly designed, engineered or 
manufactured high-voltage battery 
assemblies could cause a fire in your 
vehicle.
A vehicle fire could result in a crash or 
injury.
Only use a genuine Acura high-voltage 
battery assembly, or it s equivalent, in your 
vehicle.
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432
uuAccessories and Modifications uModifications
Maintenance
Modifications
Do not modify your vehicle in a manner that  may affect its handling, stability, or 
reliability, or install non-genuine Acura parts  or accessories that may have a similar 
effect.
Even minor modifications to vehicle system s can affect overall vehicle performance. 
Always make sure all equipment is prop erly installed and maintained, and do not 
make any modification to your vehicle or its systems that might cause your vehicle 
to no longer meet federal, state, prov ince, territory, and local regulations.
The on-board diagnostic port (OBD-II/SAE J1962 connector) installed on this vehicle 
is intended to be used with automobile system diagnostic devices or with other 
devices that Acura has appr oved. Use of any other type of device may adversely 
affect the vehicle’s electronic systems or  allow them to be compromised, possibly 
resulting in a system malfunction, drained battery, or other unexpected problems.
Do not modify or attempt to repair your  vehicle’s high-voltage hybrid power system 
or otherwise modify vehicle electrical systems. Disassembling or modifying electrical 
equipment can result in a crash or a fire.
If you ever need to replace your vehicle's high-voltage battery assembly outside of 
warranty coverage, we highly recommend that you only use a genuine Acura high-
voltage battery assembly. Genuine Acur a high-voltage battery assemblies are 
designed to work with your vehicle's hybrid power system and have been designed, 
engineered and manufactured to avoid overcharging situations. Non-genuine high-
voltage battery assemblies may not have be en similarly designed, engineered and 
manufactured, and installation of such assemblies could result in overcharging, fires, 
loss of power, or other conditions that  may increase the likelihood of a crash or 
injury.
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433Continued
Maintenance
Storage
Vehicle Storage
If you need to park your vehicle for an extended period (more than one month), 
there are several things you should do to pr epare it for storage. This helps reduce 
possible deterioration of vehicle compone nts and overall condition, which allows 
you to get the vehicle back on the  road with minimal delay. These are:
• If possible, store your NSX in a garage or enclosed area.
• Fill the fuel tank completely.
• Change the engine oil and filter.
• Wash and dry the exterior completely.
• Clean the interior. Make sure the carpetin g, floor mats, etc., are completely dry.
• Put the transmission in 
(P.
Release the parking brake.
• Leave one window open slightly (if the vehicle is being stored indoors).
• To maintain the low-voltage  12-volt battery, connect it to an accessory battery 
charger. For more information on how to  maintain your 12-volt battery, consult 
an authorized Ac ura NSX dealer.
2Checking the 12-Volt Battery P. 421
•If the vehicle is to be stored for a longer period of time, it should be supported on 
jack stands to raise the tires off the  ground to prevent tire flat spotting.
2Handling of the Jack  P. 448
•Support the front wiper blade arms with  a folded towel or rag so they do not 
touch the windshield.
• Cover the vehicle with a “breathable” co ver, one made from a porous material 
such as cotton. Nonporous materials (such  as plastic sheeting) may trap moisture, 
which can damage the paint.
• If possible, remove the vehicle from the garage or enclosed area, remove 
covering, and periodically run the en gine until it reaches full operating 
temperature (the cooling fa n cycles on and off twice).
Preferably, do this once a month.
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434
uuStorage uVehicle Storage
Maintenance
• To maintain the High Voltage battery, drive your vehicle for more than 30 minutes 
at least once every three months.
If road conditions are not suitable or desi rable for driving, the following alternate 
procedure can be used to maintain the vehicle's High Voltage battery if local idling 
by-laws permit:
1. Remove the vehicle from the garage  or enclosed area to prevent carbon 
monoxide accumulation.
2 Carbon Monoxide Gas  P. 70
2.Depress the brake pedal and press the  ENGINE START/STOP button as you 
normally would to start the vehicle.
3. Allow the vehicle to run for 30 minutes. Time  spent at idle stop still counts as part 
of this 30-minute run.
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435
Handling the Unexpected
This chapter explains how to handle unexpected troubles.
ToolsTypes of Tools .................................. 436
If a Tire Goes Flat Temporarily Repairi ng a Flat Tire....... 437
Handling of the Jack ......................... 448
Power System Won’t Start
Checking the Procedure ................... 449
If the Keyless Access Remote Battery is Weak ............................................. 450
Emergency Power System Off........... 451
If the 12-Volt Battery Is Dead .......... 452
Overheating
How to Handle Overheating ............. 454 Indicator, Coming On/Blinking
If the 12-Volt Battery Charging System Indicator Comes On ....................... 456
If the Malfunction Indicator Lamp Comes  On or Blinks ................................... 456
If the Brake System Indicator (Red) Comes 
On ................................................. 457
If the Electric Power Steering (EPS) System  Indicator Comes On ....................... 457
If the Electric Parking Brake System  Indicator Comes On ....................... 458
If the Low Tire Pressure/TPMS Indicator 
Comes On or Blinks........................ 459 If the Transmission System Indicator Blinks 
along with the Warning Message... 460
If the Low Oil Level Symbol Appears.....460
Fuses Fuse Locations ................................. 461
Inspecting and Changing Fuses ........ 465
Emergency Towing ........................... 466
If You Cannot Unlock the Fuel Fill Door.... 467
If You Cannot Open the Hatch............468
Refueling
Refueling from a Portable Fuel Container .... 469
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436
Handling the Unexpected
Tools
Types of Tools
1Types of Tools
The tools are stored in the trunk.
Towing Hook Funnel
Tool Box
Wheel Bolt Cap Removal Tool
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437Continued
Handling the Unexpected
If a Tire Goes Flat
Temporarily Repairing a Flat Tire
If the tire has a large cut or is otherwise severely damaged, you will need to have the 
vehicle towed. If the tire only has a sma ll puncture, from a small nail for instance, 
you can use the temporary tire repair kit so that you can drive to the nearest service 
station for a more permanent repair.
If a tire goes flat while driving, grasp  the steering wheel firmly, and brake gradually 
to reduce speed. Then stop in a safe place.
1. Park the vehicle on a firm, level, and  non-slippery surface. Apply the parking 
brake.
2. Put the transmission into 
(P.
3. Turn on the hazard warning lights an d set the power mode to VEHICLE OFF.
1Temporarily Repairing a Flat Tire
The kit should not be used in the following situations. 
Instead, contact an authorized Acura NSX dealer or a 
roadside assistant to have the vehicle towed.
•The tire sealant has expired.•More than one tire is punctured.•The puncture or cut is larger than 3/16 inch (4 mm).•The tire side wall is da maged or the puncture is 
outside the contact area.
•Damage has been caused by  driving with the tire 
extremely under inflated.
•The tire bead is no longer seated.•The rim is damaged.
Do not remove a nail or  screw that punctured the 
tire. If you remove it from the tire, you may not be 
able to repair the puncture using the kit.
NOTICE
Do not use a puncture-repairing agent other than the 
one provided in the kit that  came with your vehicle. If 
a different agent is used, you may permanently 
damage the tire pressure sensor.
When the puncture isYKit Use
Smaller than 3/16 inch 
(4 mm)Yes
Larger than 3/16 inch (4 mm)No
Contact 
Area
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uuIf a Tire Goes Flat uTemporarily Repairing a Flat Tire
438
Handling the Unexpected
1. Open the hatch.
2. Loosen tool box tie downs.
3. Remove tool box lid.
4. Take the kit out of the tool box.
5. Place the kit face up, on flat ground near 
the flat tire, and away from traffic. Do not 
place the kit on its side.
■Getting Ready to Temporarily Repair the Flat Tire1Getting Ready to Temporarily Repair the Flat Tire
When making a temporary repair, carefully read the 
instruction manual provided with the kit.
Air Compressor Instruction 
Manual
Sealant Bottle Speed Restriction 
Label
Expiration Date
Deflation Button
Air Compressor 
Switch
Repair Notification 
Label
U.S. Canada
U.S. Canada
Tie Down
Lid
Tire Repair Kit
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