2021 HONDA ACCORD SEDAN battery replacement

uuLocking and Unlocking the Doors uKey
168
Controls
The built-in key can be used to lock/unlock the
doors or open the trunk when the remote
battery becomes weak and the power door
lock/unlock operation is disabled.
To remove the built-in key, slide the release
knob and then pull out the key. To reinstall
the built-in key, push th e built-in key into the
remote until it clicks.
Contains a number that you will need if you
purchase a replacement key.
■Built-in Key
Built-in Key
Release Knob
■Key Number Tag1
Key Number Tag
Keep the key number tag separate from the key in a
safe place outside of your vehicle.
If you wish to purchase an additional key, contact a
dealer.
If you lose your key and you cannot start the engine,
contact a dealer.

539
Maintenance
This chapter discusses basic maintenance.
Before Performing MaintenanceInspection and Maintenance ............ 540
Safety When Performing Maintenance..... 541Parts and Fluids Used in Maintenance Service ........................................... 542
Maintenance Minder
TM..................... 543
Maintenance Under the Hood
Maintenance Items Under the Hood ..... 550Opening the Hood ........................... 552
Recommended Engine Oil ................ 553
Oil Check ......................................... 554
Adding Engine Oil ............................ 556
Changing the Engine Oil and Oil Filter ..... 557
Engine Coolant ................................ 561
Transmission Fluid ............................ 563
Brake Fluid ....................................... 564
Refilling Window Wa sher Fluid......... 565
Replacing Light Bulbs ....................... 566
Checking and Maintaining Wiper
Blades .......................................... 574
Checking and Maintaining Tires
Checking Tires ................................. 577
Tire and Loading Information Label ...... 578Tire Labeling .................................... 578DOT Tire Quality Grading (U.S. Vehicles)....... 580Wear Indicators................................ 582 Tire Service Life ................................ 582
Tire and Wheel Replacement ........... 583
Tire Rotation .................................... 584
Winter Tires ..................................... 585
Battery ............................................... 586
Remote Transmitter Care
Replacing the Button Battery ........... 588
Climate Control System Maintenance.... 589Cleaning
Interior Care .................................... 590
Exterior Care.................................... 592
Accessories and Modifications ........ 595

587
uuBattery uCharging the Battery
Maintenance
Charging the Battery
Disconnect both battery cables to prevent damaging your vehicle’s electrical system.
Always disconnect the negative (–) cable first, and reconnect it last.1Charging the Battery
When replacing the battery, the replacement must be
of the same specifications.
Consult a dealer for more information.
The Vehicle Stability Assist
TM (VSA ®) system, Vehicle
Stability AssistTM (VSA ®) OFF, adaptive cruise control
(ACC) with Low Speed Follow, safety support and
low tire pressure/TPMS indicators may come on in
amber along with a message in the driver information
interface when you set the power mode to ON after
reconnecting the battery.
Drive a short distance at more than 12 mph (20 km/h).
Each indicator should go off. If any do not, have your
vehicle checked by a dealer.
The battery installed in this vehicle is specifically
designed for a model wi th Auto Idle Stop.
Using a battery other than this specified type may
shorten the battery life, a nd prevent Auto Idle Stop
from activating. If you need to replace the battery,
make sure to select the specified type and size. Ask a
dealer for more details.
Models with Auto Idle Stop

588
Maintenance
Remote Transmitter Care
Replacing the Button Battery
If the indicator does not come on when the button is pressed, replace the battery.
1.Remove the built-in key.
2. Remove the upper half of the cover by
carefully prying on the edge with a coin.
u Wrap a coin with a cloth to prevent
scratching the remote.
u Remove carefully to avoid losing the
buttons.
3. Make sure to replace the battery with the
correct polarity.1 Replacing the Button Battery
NOTICE
An improperly disposed of battery can damage the
environment. Always conf irm local regulations for
battery disposal.
Replacement batteries are commercially available or
at a dealer.
3WARNING
CHEMICAL BURN HAZARD
The battery that powers the remote can
cause severe internal burns and can even
lead to death if swallowed.
Keep new and used batteries away from
children.
If you suspect that a child has swallowed
the battery, seek medical attention
immediately.
Battery type: CR2032
Battery

644
uuWarranty Coverages u
Information
Replacement Battery Limited Warranty – provides prorated coverage for a
replacement battery purchased from your dealer.
Replacement Muffler Life time Limited Warranty – provides coverage for as
long as the purchaser of the muffler owns the vehicle.
Restrictions and exclusions apply to a ll these warranties. Please read the Honda
warranty information booklet that came wi th your vehicle for precise information on
warranty coverages. Your vehi cle’s original tires are covered by their manufacturer.
Tire warranty information is in a separate booklet.
■Statement on Warranty Coverage for Aftermarket and Recycled Parts
The Magnuson-Moss Warranty Act, 15 U.S.C. s.2301 et seq., makes it illegal for
motor vehicle manufacturers to void a motor vehicle warranty or deny warranty
coverage solely because an aftermarket or recycled part has been used to repair the
vehicle or someone other than the authorized service provider performed service on
the vehicle. This provision does not apply to a new motor vehicle purchased solely
for commercial or industrial use.
Under federal law, a manufacturer may deny warranty coverage and charge for repairs
to a vehicle if it is discovered that an aftermarket or recycled part installed on the
vehicle is defective or was in stalled incorrectly and caused damage to another part of
the vehicle otherwise covered under warran ty. The Federal Trade Commission requires
that a manufacturer demonstrate that an aftermarket or recycled part or service
performed by a person other than an authorized service provider caused damage to
another part of the vehicle otherwise covered under warranty before denying
warranty coverage. Additionally, federal law allows a manufacturer to void a motor
vehicle warranty or deny warranty coverage if the manufacturer provides the article or
service to consumers free of charge unde r the warranty or the manufacturer has
secured a waiver from the Federal Trade Commission.

649
Index
Automatic TransmissionCreeping................................................. 421
Fluid ....................................................... 563
Kickdown ............................................... 421
Shift Operation ....................................... 423
Shifting ................................................... 422
Average Fuel Economy ............................ 145
Average Speed ......................................... 147
B
Battery...................................................... 586
Charging System Indicator ................ 88, 615
Jump Starting ......................................... 608
Maintenance (Checking the Battery) ....... 586
Maintenance (Replacing) ......................... 588
Belts (Seat) .................................................. 38
Beverage Holders ..................................... 227
Blind spot information System ................ 452
Bluetooth ® Audio ..................................... 299
Bluetooth ® HandsFreeLink ®................... 375
Booster Seats (For Children) ...................... 77
Brake System ............................................ 510
Anti-lock Brake System (ABS) .................. 518
Automatic Brake Hold ............................. 515
Brake Assist System................................. 519
Fluid ....................................................... 564
Foot Brake .............................................. 514
Indicator ............................. 83, 84, 617, 618
Parking Brake.......................................... 510
Brightness Control (Instrument Panel) ... 205Bulb Replacement
.................................... 566
Brake, Taillight, Rear Side Marker Lights and
Rear Turn Signal Light ............................ 569
Fog Lights ................................................ 568
Front Side Marker Lights .......................... 568
Front Turn Signal Lights ........................... 568
Headlights ............................................... 566
High-Mount Brake Light .......................... 573
Parking/Daytime Running Lights .............. 568
Rear License Plate Lights .......................... 573
Side Turn Signal/Em ergency Indicator
Lights .................................................... 568
Taillight, Brake Light and Back-Up Light ... 571
Bulb Specifications ........................... 634, 636
C
Carbon Monoxide Gas ................................ 78
Cargo Hooks ............................................. 229
Carrying Cargo .................................. 405, 407
Center Pocket ........................................... 225
Certification Label .................................... 638
Changing Bulbs ......................................... 566
Charging System Indicator ................. 88, 615
Child Safety ................................................. 64
Childproof Door Locks ............................. 179
Emergency Trunk Opener ........................ 183
Child Seat .................................................... 64
Booster Seats ............................................. 77
Child Seat for Infants ................................. 66
Child Seat for Small Children ..................... 67 Installing a Child Seat wi
th a Lap/Shoulder Seat
Belt ......................................................... 72
Larger Children ......................................... 76
Rear-facing Child Seat ............................... 66
Selecting a Child Seat ................................ 68
Using a Tether ........................................... 74
Childproof Door Locks ............................. 179
Cleaning the Exterior ............................... 592
Cleaning the Interior ................................ 590
Climate Control System ............................ 240
Changing the Mode ................................ 240
Defrosting the Windshield and Windows ............................................... 241
Dust and Pollen Filter............................... 589
Recirculation and Fresh Air Mode ............ 240
Sensors ................................................... 243
Synchronized Mode................................. 242
Using Automatic Climate Control ............ 240
Clock .......................................................... 166
CMBS
TM (Collision Mitigation Braking
SystemTM) ................................................. 458
Coat Hook ................................................. 229
Collision Mitigation Braking System
TM
(CMBSTM) ................................................. 458
Compact Spare Tire .................. 599, 635, 637
Console Compartment ............................. 226
Continuously Variable Transmission Creeping ................................................. 421
Fluid ........................................................ 563
Kickdown ................................................ 421
Operating the Shift Lever........... 24, 430, 432

653
Index
L
Lane Keeping Assist System (LKAS)........ 488
Language (HFL) ........................................ 377
LATCH (Child Seats) ................................... 69
Lights ................................................ 195, 566
Auto High-Beam ..................................... 199
Automatic............................................... 196
Bulb Replacement ................................... 566
Daytime Running Lights .......................... 198
Fog Lights ............................................... 197
High Beam Indicator ................................. 97
Interior.................................................... 223
Light Switches......................................... 195
Lights On Indicator.................................... 97
Turn Signals ............................................ 194
Load Limits ............................................... 407
Locking/Unlocking ................................... 167
Auto Door Locking/Unlocking ................. 180
Childproof Door Locks ............................ 179
From Inside ............................................. 177
From Outside .......................................... 170
Keys........................................................ 167
Using a Key............................................. 175
Lockout Prevention System ..................... 176
Low Battery Charge ................................. 615
Low Fuel Indicator ..................................... 93
Low Oil Pressure Warning ....................... 615
Low Remote Signal Strength .................. 169
Low Speed Braking Control .................... 467
Lower Anchors ........................................... 69
Lubricant Specifications Chart ........ 634, 636Luggage (Maximum Load Limit)
............. 407
Lumbar Support Adjustment Switch ....... 213
M
Maintenance..................................... 149, 539
Battery .................................................... 586
Brake Fluid .............................................. 564
Cleaning .................................................. 590
Climate Control System ........................... 589
Coolant ................................................... 561
Maintenance Minder
TM............................ 543
Oil ........................................................... 554
Precautions .............................................. 540
Radiator .................................................. 562
Remote Transmitter ................................. 588
Replacing Light Bulbs ............................... 566
Safety ...................................................... 541
Service Items ........................................... 547
Tires ........................................................ 577
Transmission Fluid ................................... 563
Under the Hood ...................................... 550
Malfunction Indicator Lamp .............. 87, 616
Map Lights ................................................ 224
Maximum Load Limit ............................... 407
Meters, Gauges ......................................... 139
Mirrors ....................................................... 210
Adjusting ................................................. 210
Door ........................................................ 211
Exterior .................................................... 211
Interior Rearview ..................................... 210 Modifications (and Accessories)
.............. 595
Moonroof ................................................. 190
MP3 ........................................................... 296
MP3/WMA/AAC ........................................ 296
Multi-View Rear Camera .......................... 531
N
Navigation........................................ 148, 163
Numbers (Identification) .......................... 638
O
Odometer................................................. 142
Oil (Engine) ............................................... 553
Adding .................................................... 556
Checking................................................. 554
Displaying Oil Life .................................... 544
Low Oil Pressure Warning........................ 615
Recommended Engine Oil ....................... 553
Viscosity .................................................. 553
Open Source Licenses ............................... 346
Opening
Trunk ...................................................... 630
Opening/Closing Hood....................................................... 552
Moonroof ............................................... 190
Power Windows ...................................... 187
Trunk ...................................................... 181
Outside Temperature ............................... 143
Overheating .............................................. 613

654
Index
P
Paddle Shifters.................................. 427, 433
Panic Mode ............................................... 186
Parking ...................................................... 520
Parking Brake ............................................ 510
Parking Brake and Brake System Indicator (Amber) ............................................. 84, 618
Parking Brake and Brake System Indicator
(Red) .......................................... 83, 617, 618
Parking Sensor System .............................. 522
Passenger Front Airbag Off Indicator ....... 61
Passing Indicators ..................................... 195
Phone ........................................................ 150
Playing Bluetooth ® Audio ........................ 299
Power Windows ........................................ 187
Precautions While Driving ........................ 420
Rain ......................................................... 420
Pregnant Women ....................................... 44
Puncture (Tire) .......................................... 599
R
Radiator..................................................... 562
Radio (AM/FM) .......................................... 278
Radio (SiriusXM ®)...................................... 282
Radio Data System (RDS) .......................... 280
Range ........................................................ 145
RDS (Radio Data System) .......................... 280
Readiness Codes (Emissions Testing) ....... 641
Rear Defogger/Heated Door Mirror
Button ....................................................... 204 Rear Seat (Folding Down)
........................ 216
Rear Seat Heaters ..................................... 239
Rear Seat Reminder .................................. 217
Rearview Mirror ....................................... 210
Refueling .................................................. 533
Fuel Gauge.............................................. 139
Gasoline .................................. 533, 634, 636
Low Fuel Indicator ..................................... 93
Regulations ............................... 450, 580, 639
Remote Engine Start ................................ 416
Remote Transmitter ................................. 174
Replacement Battery .................................................... 588
Bulbs ....................................................... 566
Fuses ............................... 622, 624, 626, 627
Tires ........................................................ 583
Wiper Blade Rubber ................................ 574
Reporting Safety Defects ......................... 640
Resetting a Trip Meter ..................... 143, 145
Road Departure Mitigation (RDM) ......... 496
On and Off.............................................. 498S
Safe Driving ................................................ 33
Safety Check ............................................... 37
Safety Labels ............................................... 79
Safety Message ............................................. 2
Safety Support .......................................... 158 Seat Belts
.................................................... 38
Adjusting the Shoulder Anchor ................. 43
Automatic Seat Belt Tensioners ................. 41
Checking .................................................. 45
Fastening .................................................. 42
Installing a Child Seat wi th a Lap/Shoulder Seat
Belt ......................................................... 72
Pregnant Women...................................... 44
Reminder .................................................. 39
Warning Indicator ............................... 39, 92
Seat Heaters ............................. 237, 238, 239
Seat Ventilation ....................................... 238
Seats .......................................................... 212
Adjusting ................................................ 212
Front Seats.............................................. 212
Rear Seats ............................................... 216
Seat Heaters ........................... 237, 238, 239
Seat Ventilation ...................................... 238
Security System ........................................ 184
Immobilizer System Indicator ..................... 98
Security System Alarm Indicator ................ 99
Selecting a Child Seat ................................ 68
Sequential Mode ...................................... 427
Operation ............................................... 428
Shift Buttons ...................................... 21, 422
Operation ............................................... 423
Shift Lever .................................. 24, 429, 431
Operation ................................. 24, 430, 432
Releasing ................................................ 611
Won’t Move ........................................... 611
Shift Position Indicator .............................. 88