spark plugs replace JEEP WRANGLER UNLIMITED 2021 Owner handbook (in English)

SERVICING AND MAINTENANCE
214
Inspect the transfer case
fluid.X
X X
Inspect the CV/Universal
joints. X X X X X X X X X X X X X X X X X X X X
Change brake fluid every
24 months if using DOT
4 brake fluid. ** X X X X X X X X X X
Adjust parking brake on
vehicles equipped with
four-wheel disc brakes. X
X X XX
Replace engine air
cleaner filter. X
X X XX
Replace air
conditioning/cabin air
filter. X
X X XXX
Replace spark plugs
(2.0L Engine) *** X
X XX
Replace spark plugs
(3.6L Engine) *** X
X
Mileage or time passed
(whichever comes first)
7,500
15,000
22,500
30,000
37,500
45,000
52,500
60,000
67,500
75,000
82,500
90,000
97,500
105,000
112,500
120,000
127,500
135,000
142,500
150,000
Or Months: 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180 192 204 216 228 240
Or Kilometers:
12,000
24,000
36,000
48,000
60,000
72,000
84,000
96,000
108,000
120,000
132,000
144,000
156,000
168,000
180,000
192,000
204,000
216,000
228,000
240,000
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INDEX
Recreational Towing ........................... 176Shifting Into Transfer CaseNeutral (N)................................. 177
Shifting Out Of Transfer Case Neutral (N)................................. 178
Release, Hood ..................................... 55
Reminder, Seat Belt............................. 99
Remote Control Starting System ............................... 14
Remote Keyless Entry Arm The Alarm................................. 15
Disarm The Alarm ............................ 15
Remote Sound System (Radio)
Control ............................................. 279
Remote Starting System ....................... 14
Removable Doors ........................... 21 , 23
Front............................................... 21
Rear................................................ 23
Removable Top .........................47 , 51 , 53
Removal ............................................. 51
Removing............................................ 53
Replacement Bulbs ............................ 179
Replacement Keys ............................... 12
Replacement Tires ............................. 236
Restraints, Head .................................. 28
Roll Over Warning .................................. 2
Roof Type Carrier ................................. 58
Rotation, Tires ................................... 241 S
Safety Checks Inside Vehicle .............. 136
Safety Checks Outside Vehicle ............ 137
Safety Tips ....................................... 135
Safety, Exhaust Gas ........................... 135
Schedule, Maintenance...............210
, 216
Seat Belt Reminder ............................. 67
Seat Belts ....................................98 , 136
Adjustable Shoulder Belt ................ 103
Adjustable Upper Shoulder Anchorage ................................. 103
Adjustable Upper Shoulder Belt Anchorage ................................. 103
Energy Management Feature ........... 104
Front Seat ........................ 98 , 100 , 102
Inspection ..................................... 136
Lap/Shoulder Belt Operation ........... 102
Lap/Shoulder Belt Untwisting .......... 103
Lap/Shoulder Belts......................... 100
Operating Instructions .................... 102 Pregnant Women ........................... 104
Pretensioners................................. 104
Rear Seat ...................................... 100
Reminder ........................................ 99
Seat Belt Pretensioner .................... 104Seat Belt Reminder ......... 67 , 74 , 75 , 99
Untwisting Procedure ..................... 103
Seat Belts Maintenance ..................... 245 Seats ..................................................24
Adjustment ......................................24
Fold And Tumble Rear ......................27
Rear Folding ....................................24
Tilting .............................................24
Security Alarm ............................... 15 , 68
Arm The System ...............................15
Disarm The System ...........................15
Selection Of Coolant (Antifreeze) .........254
Sentry Key Replacement .......................12
Service Assistance .............................304
Shifting .............................................143 Automatic Transmission .......... 143 , 145
Transfer Case, Shifting Into Transfer Case Neutral (N).............177
Transfer Case, Shifting Out Of Transfer Case Neutral (N).............178
Shoulder Belts ...................................100
Signals, Turn ................74 , 137 , 181 , 182
Siri ...................................................300
Snow Chains (Tire Chains) ..................240
Snow Tires ........................................237
Soft Top ........................................ 47 , 53
Spare Tires ........................ 193 , 237 , 238
Spark Plugs .......................................254
Specifications Fuel (Gasoline) ...............................254
Oil ................................................254
2020_JEEP_JL_WRANGLER_UG_RHD_UK.book Page 324