2021 JEEP WRANGLER UNLIMITED belt

215
* See “Severe Duty Conditions” in this
section.
** DOT 4 brake fluid is time based only;
mileage intervals do not apply.*** The spark plug change interval is
mileage based only, yearly intervals do not
apply.
**** This maintenance is recommended by
the manufacturer to the owner, but is not
required to maintain emissions warranty.
Replace accessory drive
belt(s).
X

Flush and replace the
engine coolant at 10
years or 150,000 miles
(240,000 km) whichever
comes first.
X
X

Change transfer case fluid
if using your vehicle for
any of the following:
police, taxi, fleet, or
frequent trailer towing.
X
X
Inspect and replace PCV
valve if necessary. **** 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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SERVICING AND MAINTENANCE
216
Severe Duty Conditions
Change the engine oil and engine oil filter at
every 4,500 miles (7,500 km) or 6 months
if using your vehicle under any of the
following severe duty conditions:
Stop and go driving.
Driving in dusty conditions.
Short trips of less than 10 miles (16 km).
Trailer towing.
Taxi, police, or delivery service (commer-
cial service).
Off-road or desert operation.
Scheduled Servicing — Diesel Engine
Your vehicle is equipped with an automatic
oil change indicator system. The oil change
indicator system will remind you that it is
time to take your vehicle in for engine oil
replacement.
On vehicles equipped with instrument
cluster display, “Oil Change Required” will
be displayed and a single chime will sound,
indicating that an oil change is necessary.
On non-instrument cluster display equipped
vehicles, “Change Oil” will flash in the
instrument cluster odometer and a single
chime will sound, indicating that an oil
change is necessary.

Based on engine operation conditions, the oil
change indicator message will illuminate. This
means that service is required for your vehicle.
Operating conditions such as frequent
short-trips, trailer tow, extremely hot or cold
ambient temperatures will influence when the
“Oil Change Required” message is displayed. Severe Operating Conditions can cause the
change oil message to illuminate as earlier than
specified. Have your vehicle serviced as soon
as possible, within the next 500 miles
(805 km).

NOTE:
The actual interval for changing engine oil
and replacing the engine oil filter depends
on the vehicle usage conditions, and is
signaled by the warning light or message
in the instrument panel. In any case, it
must never exceed 12,500 miles
(20,000 km) or 1 year
Flush and replace the engine coolant at
120 months or 150,000 miles (240,000 km)
whichever comes first.
The maximum mileage is 75,000 mi
(120,000 km). The belt must be replaced
every 5 years regardless of distance trav-
eled. The timing and accessory belts must be
changed every 37,500 miles (60,000 km) or
3 years for particularly demanding use
(dusty areas, severe weather conditions,
very low or very high temperatures for
extended periods, city driving, long periods
of idling). Under no circumstances should
these intervals be exceeded.
WARNING!
You can be badly injured working on or
around a motor vehicle. Do only service
work for which you have the knowledge
and the right equipment. If you have any
doubt about your ability to perform a
service job, take your vehicle to a compe-
tent mechanic.
Failure to properly inspect and maintain
your vehicle could result in a component
malfunction and effect vehicle handling
and performance. This could cause an
accident.
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219
Additional Maintenance
Replace engine air cleaner filter.X X X X X X X
Replace air conditioning/cabin air filter. 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
Replace the engine fuel filter. X X X X X X X
Inspect accessory drive and timing belt. XX X
Replace accessory drive belt. (***) XX
Flush and replace the engine coolant at 10 years or
150,000 miles (240,000 km) whichever comes first. X X
Replace timing drive belt. (***) XX
Mileage or time passed (whichever comes first)
12,500
25,000
37,500
50,000
62,500
75,000
87,500
100,000
112,500
125,000
137,500
150,000
162,500
175,000
187,500
Or Years: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
180,000
200,000
220,000
240,000
260,000
280,000
300,000
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SERVICING AND MAINTENANCE
220
(*) The actual interval for changing engine
oil and replacing the engine oil filter
depends on the vehicle usage conditions,
and is signaled by the warning light or
message in the instrument panel. In any
case, it must never exceed 12,500 miles
(20,000 km) or 1 year.
(**) The brake fluid interval is time based
only, mileage intervals do not apply.(***) The maximum mileage is 75,000 mi
(120,000 km). The belt must be replaced
every 5 years regardless of distance traveled.
The timing and accessory belts must be
changed every 37,500 miles (60,000 km) or
3 years for particularly demanding use (dusty
areas, severe weather conditions, very low or
very high temperatures for extended periods,
city driving, long periods of idling). Under no
circumstances should these intervals be
exceeded.
(°) Consumption of additive AdBlue®
(UREA) depends on the condition of use of
the vehicle and is indicated by LED and/or
message on the instrument panel. WARNING!
You can be badly injured working on or
around a motor vehicle. Do only service
work for which you have the knowledge
and the right equipment. If you have any
doubt about your ability to perform a
service job, take your vehicle to a compe-
tent mechanic.
Failure to properly inspect and maintain
your vehicle could result in a component
malfunction and effect vehicle handling
and performance. This could cause an
accident.
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245
Care Of Fabric Top Windows
Your vehicle's fabric top has pliable plastic
windows which can be scratched unless
special care is taken by following these
directions:
Never use a dry cloth to remove dust.
Instead, use a microfiber towel or soft
cotton cloth moistened with cold or warm,
clean water, and wipe across the window,
not up and down. It removes fine scratches
to improve visibility and provides UV
protection to help prevent yellowing.
When washing, never use hot water or
anything stronger than a mild soap. Never
use solvents such as alcohol or harsh
cleaning agents.
Always rinse thoroughly with cold water,
then wipe with a soft and slightly moist,
clean cloth.
When removing frost, snow or ice, never
use a scraper or de-icing chemicals. Use
warm water only if you must clean the
window quickly.
Debris (sand, mud/dirt, dust, or salt) from
off-road driving will have an impact on
plastic retainer operation. Even normal
on-road driving and vehicle washing will
eventually impact window plastic retainer
operation. To maintain ease of use of the
window plastic retainers, each window
plastic retainer should be cleaned and
lubricated regularly. Clean them with a
mild soap solution and a small brush.
Cleaning products are available through
an authorized dealer.
Never paste stickers, gummed labels or
any tape to the windows. Adhesives are
hard to remove and may damage the
windows.
INTERIORS
Seats And Fabric Parts
Use a specific product to clean fabric uphol -
stery and carpeting.
Seat Belt Maintenance
Do not bleach, dye or clean the belts with
chemical solvents or abrasive cleaners. This
will weaken the fabric. Sun damage can also
weaken the fabric.
If the belts need cleaning, use a mild soap
solution or lukewarm water. Do not remove
the belts from the vehicle to wash them. Dry
with a soft cloth.
Replace the belts if they appear frayed or
worn or if the buckles do not work properly.
Do not use pure windshield washer fluid
for cleaning the front windshield and
rear window; dilute it min. 50% with
water. Only use pure windshield washer
fluid when strictly necessary due to
outside temperature conditions.
CAUTION! (Continued)
WARNING!
Do not use volatile solvents for cleaning
purposes. Many are potentially flammable,
and if used in closed areas they may cause
respiratory harm.
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SERVICING AND MAINTENANCE
246
Plastic And Coated Parts
Use a specific product to clean vinyl uphol-
stery.
Cleaning Plastic Instrument Cluster Lenses
The lenses in front of the instruments in this
vehicle are molded in clear plastic. When
cleaning the lenses, care must be taken to
avoid scratching the plastic.
1. Clean with a wet soft cloth. A mild soap solution may be used, but do not use
high alcohol content or abrasive
cleaners. If soap is used, wipe clean with
a clean damp cloth.
2. Dry with a soft cloth.
Leather Parts
Your leather upholstery can be best
preserved by regular cleaning with a damp
soft cloth. Small particles of dirt can act as
an abrasive and damage the leather uphol -
stery and should be removed promptly with a
damp cloth. Care should be taken to avoid
soaking your leather upholstery with any
liquid. Please do not use polishes, oils,
cleaning fluids, solvents, detergents, or
ammonia-based cleaners to clean your
leather upholstery. Application of a leather
conditioner is not required to maintain the
original condition. NOTE:
If equipped with light colored leather, it
tends to show any foreign material, dirt, and
fabric dye transfer more so than darker
colors. The leather is designed for easy
cleaning.
Glass Surfaces
All glass surfaces should be cleaned on a
regular basis with any commercial house
-
hold-type glass cleaner. Never use an abra -
sive type cleaner. Use caution when cleaning
the inside rear window equipped with elec -
tric defrosters or windows equipped with
radio antennas. Do not use scrapers or other
sharp instruments that may scratch the
elements.
When cleaning the rear view mirror, spray
cleaner on the towel or cloth that you are
using. Do not spray cleaner directly on the
mirror.
WARNING!
A frayed or torn belt could rip apart in a
collision and leave you with no protection.
Inspect the belt system periodically,
checking for cuts, frays, or loose parts.
Damaged parts must be replaced
immediately. Do not disassemble or modify
the system. Seat belt assemblies must be
replaced after a collision if they have been
damaged (i.e., bent retractor, torn
webbing, etc.).
CAUTION!

Direct contact of air fresheners, insect
repellents, suntan lotions, or hand sani -
tizers to the plastic, painted, or decorated
surfaces of the interior may cause perma -
nent damage. Wipe away immediately.

Damage caused by these type of prod -
ucts may not be covered by your New
Vehicle Limited Warranty.
CAUTION!
Do not use Alcohol and Alcohol-based and/
or Ketone based cleaning products to
clean leather upholstery, as damage to the
upholstery may result.
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319
INDEX
A
Accessories ....................................... 258Mopar ........................................... 258
Active Speed Limiter .......................... 156
Adaptive Cruise Control (ACC)
(Cruise Control) ................................. 158
Adding Fuel ...................................... 169
Additives, Fuel .................................. 249
Air Bag Air Bag Operation ........................... 107Air Bag Warning Light ..................... 105
Disable, Passenger Air Bag.............. 107

Enhanced Accident Response ... 115 , 209

Event Data Recorder (EDR) ............. 209
Front Air Bag ................................. 106
If Deployment Occurs ..................... 114
Knee Impact Bolsters ..................... 112
Maintaining Your Air Bag System ..... 116
Maintenance .................................. 116
Redundant Air Bag Warning Light .... 105
Transporting Pets ........................... 134
Air Bag Light ........................65 , 105 , 136
Air Conditioning................................... 44
Air Conditioning Filter .......................... 46
Air Conditioning System ....................... 44
Air Conditioning, Operating Tips ............ 45 Air Pressure
Tires ............................................. 233
Alarm Arm The System .............................. 15
Disarm The System .......................... 15
Security Alarm ............................15 , 68
Alarm (Security Alarm) ......................... 16
Alterations/Modifications Vehicle ............................................. 2
Android Auto...................... 266 , 271 , 302
Apps ............................................. 274
Communication ............................. 273
Maps ............................................ 272
Music ........................................... 273
Antifreeze (Engine Coolant) ................ 253
Anti-Lock Brake System (ABS) .............. 78
Anti-Lock Warning Light ....................... 68
Apple CarPlay .................... 267 , 274 , 303
Apps ............................................. 276
Maps ............................................ 276
Messages ...................................... 275
Music ........................................... 275
Phone ........................................... 275
Assist, Hill Start .................................. 85
Audio Systems (Radio) ................260 , 262
Auto Down Power Windows ................... 46
Automatic Headlights .......................... 33 Automatic High Beams .........................33
Automatic Temperature Control (ATC) ....44
Automatic Transmission......................145
Fluid Level Check ................... 231 , 232
Fluid Type ............................. 231 , 257
Special Additives ............................231

Auxiliary Electrical Outlet (Power Outlet)... 56

Auxiliary Power Outlet ..........................56
Auxiliary Switches ................................58
Axle Fluid..........................................257
Axle Lock ..........................................151
B
Battery ........................................ 66 , 225
Charging System Light ......................66
Belts, Seat ........................................136
Blind Spot Monitoring ..........................87
Brake Assist System .............................79
Brake Control System ...........................79
Brake Fluid ............................... 230 , 257
Brake System ....................................230 Fluid Check ...................................230
Master Cylinder ..............................230
Warning Light...................................65
Brake/Transmission Interlock...............144
Bulb Replacement ..................... 179 , 181
Bulbs, Light .............................. 137 , 179
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322
INDEX
I
Ignition ............................................... 12Switch ............................................ 12
Installation.......................................... 51
Installing ............................................ 53
Instrument Cluster ............................... 61 Descriptions .................................... 74
Display ............................................ 60
Menu Items ..................................... 61
Instrument Panel Lens Cleaning .......... 246
Integrated Power Module (Fuses)......... 184
Interior Appearance Care .................... 245
Intermittent Wipers (Delay Wipers) ........ 35
Introduction .......................................... 1
Inverter Power.............................................. 57
J
Jack Location .................................... 193
Jack Operation .......................... 195 , 232
Jacking Instructions ........................... 195
Jump Starting ................................... 201 K
Key Fob
Arm The System .............................. 15
Disarm The System .......................... 15
Keyless Enter-N-Go.............................. 18 Passive Entry ................................... 18
Keys................................................... 11 Replacement ................................... 12
L
Lap/Shoulder Belts ............................ 100
Latches ............................................ 137 Hood .............................................. 55
Leaks, Fluid ...................................... 137
Leveling Headlights....................................... 34
Life Of Tires...................................... 235
Light Bulbs ................................137 , 179
Lights............................................... 137 Air Bag ............................ 65 , 105 , 136
Automatic Headlights ....................... 33
Brake Assist Warning........................ 82
Brake Warning ................................. 65
Bulb Replacement ..................179 , 181
Center Mounted Stop ..................... 183 Cruise ........................................74 , 76 Daytime Running ..............................32
Dimmer Switch, Headlight.................32
Electronic Stability Program (ESP)
Indicator ......................................67
Engine Temperature Warning .............67 Exterior.................................... 32 , 137
Fog ......................................... 72 , 182
Hazard Warning Flasher ..................179
Headlight Leveling ............................34
Headlights .....................................181
High Beam.......................................32
High Beam/Low Beam Select .............32 Hill Descent Control Indicator ............83Lights On Reminder ..........................34
Malfunction Indicator (Check Engine) .............................69
Park ................................................74
Passing............................................33 Rear Servicing ................................182
Rear Tail Lamps .............................182
Seat Belt Reminder .............. 67 , 74 , 75
Security Alarm .................................68
Service .................................. 179 , 181
Side Marker ...................................182
Tire Pressure Monitoring (TPMS) ........92
Traction Control................................82
Turn Signal ....................................137
Turn Signals..................... 74 , 181 , 182
Warning Instrument Cluster Descriptions ........................... 67 , 74
2020_JEEP_JL_WRANGLER_UG_RHD_UK.book Page 322