2018 JEEP WRANGLER UNLIMITED oil

The engine oil installed in the engine at the
factory is a high-quality energy conserving
type lubricant. Oil changes should be consis-
tent with anticipated climate conditions un-
der which vehicle operations will occur. For
the recommended viscosity and quality
grades, refer to “Fluids And Lubricants” in
“Technical Specifications”.
CAUTION!
Never use Non-Detergent Oil or Straight
Mineral Oil in the engine or damage may
result.
NOTE:
A new engine may consume some oil during
its first few thousand miles (kilometers) of
operation. This should be considered a nor-
mal part of the break-in and not interpreted
as a problem.
AUTOMATIC
TRANSMISSION
CAUTION!
Damage to the transmission may occur if
the following precautions are not ob-
served:
• Shift into or out of PARK or REVERSE
only after the vehicle has come to a
complete stop.
• Do not shift between PARK, REVERSE,
NEUTRAL, or DRIVE when the engine is
above idle speed.
• Before shifting into any gear, make sure
your foot is firmly pressing the brake
pedal.
NOTE:
You must press and hold the brake pedal
while shifting out of PARK.
WARNING!
• Never use the PARK position as a sub-
stitute for the parking brake. Always ap-
WARNING!
ply the parking brake fully when exiting
the vehicle to guard against vehicle
movement and possible injury or dam-
age.
• Your vehicle could move and injure you
and others if it is not in PARK. Check by
trying to move the transmission gear
selector out of PARK with the brake
pedal released. Make sure the transmis-
sion is in PARK before exiting the ve-
hicle.
• The transmission may not engage PARK
if the vehicle is moving. Always bring the
vehicle to a complete stop before shift-
ing to PARK, and verify that the trans-
mission gear position indicator solidly
indicates PARK (P) without blinking. En-
sure that the vehicle is completely
stopped, and the PARK position is prop-
erly indicated, before exiting the ve-
hicle.
• It is dangerous to shift out of PARK or
NEUTRAL if the engine speed is higher
than idle speed. If your foot is not firmly
pressing the brake pedal, the vehicle
147

Bulb Replacement
NOTE:
Lens fogging can occur under certain atmo-
spheric conditions. This will usually clear as
atmospheric conditions change to allow the
condensation to change back into a vapor.
Turning the lamps on will usually accelerate
the clearing process.
Halogen Headlamps
NOTE:
We advise referring to an authorized dealer
for service.
1. Open hood and support using prop rod.
2. Remove the front grille. Turn the retainers
along the top 1/4 turn counterclockwise
and remove.
3. Pull the bottom of the grille away starting
at one side and working toward the other.
4. Remove the three screws holding the
headlamp to the vehicle.
5. Remove lamp from the vehicle.
6. Remove the lamp from the collar.7. Grasp the bulb and turn 1/4 turn
counterclockwise.
8. Pull the bulb from the housing.
9. Push connector locking tab to the unlock
position.
10. Remove connector from bulb.
11. Push connector onto new bulb base, and
push the connector locking tab to the
lock position.CAUTION!
Do not touch the new bulb with your fin-
gers. Oil contamination will severely
shorten bulb life. If the bulb comes in
contact with any oily surface, clean the
bulb with rubbing alcohol.
12. Reinstall bulb housing. Rotate the bulb
1/4 turn clockwise.
Front Park/Turn Signal
NOTE:
We advise referring to an authorized dealer
for service.1. Remove the front wheel liner fasteners to
access bulb sockets.
2. Turn the socket assembly 1/4 turn coun-
terclockwise and remove from housing.
Pull the bulb straight from the socket to
replace.
LED Front Side Marker
Please see an authorized dealer for service.
Wheel Liner
IN CASE OF EMERGENCY
178

Halogen Front Fog Lamp
NOTE:
We advise referring to an authorized dealer
for service.
1. Reach under the vehicle to access the
back of the front fog lamp.
2.
Disconnect the wire harness connector from
the front fog lamp connector receptacle.
3. Firmly grasp the bulb by the two latch
features and squeeze them together to
unlock the bulb from the back of the front
fog lamp housing.
4. Pull the bulb straight out from the keyed
opening in the housing and then connect
the replacement bulb.
CAUTION!
Do not touch the new bulb with your fin-
gers. Oil contamination will severely
shorten bulb life. If the bulb comes in
contact with any oily surface, clean the
bulb with rubbing alcohol.LED Front Fog Lamp
Please see an authorized dealer for service.
Rear Tail, Stop, Turn Signal, And Backup
Lamp
1.Remove interior trim panel cap to access
single retaining screw for tail lamp
assembly.
2. Remove retaining screw and disconnect
electrical connector, then remove tail
lamp assembly from the vehicle.
NOTE:
If necessary, push in on the assembly tab
located inboard behind the lamp housing.
Trim Cap
Retaining Screw
179

3. Remove the three screws from assembly
bracket to access bulb sockets.
4. Rotate the appropriate socket 1/4 turn
counterclockwise, then remove it from the
housing.
5. Pull the bulb straight from the socket to
replace.Center High-Mounted Stop Lamp (CHMSL)
Please see an authorized dealer for service.
License Plate Lamps
1. Reach under the vehicle to access the
back of the lamp.
2. Firmly grasp the bulb by the two latch
features and squeeze them together to
unlock the bulb from the back of the lamp
housing.
Rear Fog Lamp
NOTE:
We advise referring to an authorized dealer
for service.
1. Reach under the vehicle to access the
back of the fog lamp.
2. Disconnect the wire harness connector
from the fog lamp connector receptacle.
3. Rotate the socket 1/4 turn counterclock-
wise, then remove it from the housing.4. Pull the bulb straight out from the keyed
opening in the housing and then connect
the replacement bulb and reassemble.
CAUTION!
Do not touch the new bulb with your fin-
gers. Oil contamination will severely
shorten bulb life. If the bulb comes in
contact with any oily surface, clean the
bulb with rubbing alcohol.
FUSES
WARNING!
• When replacing a blown fuse, always use
an appropriate replacement fuse with
the same amp rating as the original fuse.
Never replace a fuse with another fuse of
higher amp rating. Never replace a
blown fuse with metal wires or any other
material. Failure to use proper fuses may
result in serious personal injury, fire
and/or property damage.
• Before replacing a fuse, make sure that
the ignition is off and that all the otherAssembly Bracket
IN CASE OF EMERGENCY
180

Cavity Cartridge Fuse Micro Fuse Description
F63 – 10 Amp Red Occupant Restraint Controller (ORC)
(*)
F64 – – Spare
F65 – – Spare
F66 40 Amp Green – HVAC BLOWER MTR FRT
(*)
F67 – – Spare
F68 – – Spare
F69 – 5 Amp Tan Motor Generator Unit MGU Belt Starter Generator (BSG)
— If Equipped
(*)
F70 – 25 Amp Clear INJ/IGN COIL (GAS)/GLO PLUG MOD (DSL)
(*)
F71 – – Spare
F72 – 10 Amp Red HD ELEC ACC PKG — If Equipped
(*)
F73 20 Amp Blue – PWR TOP LT
(*)
F74 20 Amp Blue – PWR TOP RT
(*)
F75 – 10 Amp Red Power Pack Unit - Battery Pack Control Module & Auxil-
iary Power Module (PPU-BPCM & APM) Belt Starter
Generator (BSG) — If Equipped
(*)
IN CASE OF EMERGENCY
186

SERVICING AND MAINTENANCE
SCHEDULED SERVICING......208
Scheduled Servicing — Gasoline Engine.208
Scheduled Servicing — Diesel Engine .213
ENGINE COMPARTMENT......217
2.0L Gasoline Engine............217
3.6L Gasoline Engine............218
2.2L Diesel Engine.............219
Checking Oil Level — Gasoline Engine .220
Adding Washer Fluid............220
Maintenance-Free Battery........221
DEALER SERVICE...........221
Windshield Wiper Blades.........222
Cooling System...............224
Brake System................224
Automatic Transmission..........225
RAISING THE VEHICLE.......226
TIRES....................226
Tire Safety Information..........226
Tires — General Information.......230
Tire Types...................234
Spare Tires — If Equipped........235
Wheel And Wheel Trim Care.......236Tire Chains (Traction Devices).......237
Tire Rotation Recommendations.....238
STORING THE VEHICLE......239
BODYWORK...............239
Body And Underbody Maintenance . . .239
Preserving The Bodywork.........239
INTERIORS................242
Seats And Fabric Parts...........242
Plastic And Coated Parts..........243
Leather Parts.................243
Glass Surfaces...............243
SERVICING AND MAINTENANCE
207

SCHEDULED SERVICING
Correct servicing is crucial for guaranteeing a
long life for the car under the best conditions.
For this reason, Jeep has planned a series of
checks and services at fixed distance inter-
vals and, where provided, at fixed time inter-
vals, as described in the Scheduled Servicing
plan. To keep the car’s efficiency in tip-top
condition, in the following Scheduled Service
plan pages a few additional checks are listed
that should be carried out more frequently
with respect to the normal coupon redemp-
tion schedule. Scheduled Servicing is offered
by all authorized dealerships according to
fixed time or mileage intervals. If, during
each operation, in addition to the ones
scheduled, the need arises for further re-
placements or repairs, these may be carried
out with the owner's explicit agreement only.
The technicians at your dealership know your
vehicle best, and have access to factory
trained information, genuine Mopar parts,
and specially designed electronic and me-
chanical tools that can help prevent future
costly repairs. If your car is used frequently
for towing, the interval between one sched-uled servicing operation and the next should
be reduced. More frequent maintenance may
be needed for vehicles in severe operating
conditions, such as dusty areas and very
short trip driving.
NOTE:
Scheduled Servicing interventions are set out
by the Manufacturer. Failure to have them
carried out may invalidate the warranty. It is
advised to inform an authorized dealership of
any small operating irregularities without
waiting for the next service.
Scheduled Servicing — Gasoline Engine
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 dis-
played and a single chime will sound, indi-
cating that an oil change is necessary.
On non-instrument cluster display equipped
vehicles, “Change Oil” will flash in the in-
strument cluster odometer and a single
chime will sound, indicating that an oil
change is necessary.The oil change indicator message will illumi-
nate approximately 7,000 miles
(11,200 km) after the most recent oil change
was performed. Have your vehicle serviced as
soon as possible, within 500 miles (800 km)
(except for 2.0L gasoline engine with GPF -
Gasoline Particulate Filter). However, an ear-
lier oil change at 4,500 miles (7,500 km)
may be required if the vehicle is operated
under “Severe Duty Conditions” later in this
section.
NOTE:
• The oil change indicator message will not
monitor the time since the last oil change.
Change your vehicle's oil if it has been
12 months since your last oil change even
if the oil change indicator message is NOT
illuminated.
• Change your engine oil more often if you
drive your vehicle off-road for an extended
period of time.
• Under no circumstances should oil change
intervals exceed 7,500 miles (12,000 km)
or 12 months, whichever comes first (ex-
cept for 2.0L gasoline engine with GPF -
Gasoline Particulate Filter).
SERVICING AND MAINTENANCE
208

Your authorized dealer will reset the oil
change indicator message after completing
the scheduled oil change.
Once A Month Or Before A Long Trip
• Check the engine oil level about five min-
utes after a fully warmed engine is shut off.
Checking the oil level while the vehicle is
on level ground will improve the accuracy of
the oil level reading. Add oil only when the
level is at or below the ADD or MIN mark.
• Check the windshield washer solvent and
add if required.
• Check tire pressure and look for unusual
wear or damage. Rotate tires at the first
sign of irregular wear, even if it occurs
before the oil indicator system turns on.• Inspect the battery and clean and tighten
the terminals as required.
• Check the fluid levels of coolant reservoir,
brake master cylinder and power steering
and fill as needed.
• Check all lights and other electrical items
for correct operation.
At Each Oil Change
• Change the engine oil filter.
• Inspect the brake hoses and lines.
CAUTION!
Failure to perform the required mainte-
nance items may result in damage to the
vehicle.Required Maintenance Intervals
Refer to the Maintenance Plan on the follow-
ing pages for the required maintenance inter-
vals.
Maintenance Plan
NOTE:
Once you have carried out the last interven-
tion in the table, continue with the scheduled
servicing, maintaining the frequency indi-
cated in the plan by marking each operation
with a dot or dedicated note. Simply restart-
ing the maintenance from the start of the
plan may cause the allowed interval to be
exceeded for some operations.
209