2018 JEEP WRANGLER UNLIMITED Owner handbook (in English)

Tighten the lug nuts/bolts in a star pattern
until each nut/bolt has been tightened twice.
Ensure that the socket is fully engaged on the
lug nut/bolt (do not insert it halfway).After 25 miles (40 km), check the lug nut/
bolt torque to be sure that all the lug nuts/
bolts are properly seated against the wheel.
WARNING!
To avoid the risk of forcing the vehicle off
the jack, do not tighten the lug nuts/bolts
fully until the vehicle has been lowered.
Failure to follow this warning may result in
personal injury.
DIMENSIONS
Contour Dimension / inches (mm)
Length Width Height Wheelbase
Wrangler Sport 170.6 (4334) 74.6 (1894)71.7 (1821) (*) / 73.1
(1858) (**)96.8 (2459)
Wrangler Unlimited Sport 192.2 (4882) 74.6 (1894)72.0 (1828) (*) / 74.1
(1881) (**)118.4 (3008)
Wrangler Sahara 170.6 (4334) 74.6 (1894)72.4 (1839) (*) / 73.9
(1878) (**)96.8 (2459)
Wrangler Unlimited Sahara 192.2 (4882) 74.6 (1894)72.4 (1838) (*) / 74.4
(1891) (**)118.4 (3008)
Torque Patterns
247

Contour Dimension / inches (mm)
Wrangler Rubicon 170.6 (4334) 74.6 (1894)72.5 (1841) (*) / 73.1
(1879) (**)96.8 (2459)
Wrangler Unlimited Rubi-
con192.2 (4882) 74.6 (1894)72.8 (1848) (*) / 74.5
(1901) (**)118.4 (3008)
(*) Models with hard top.
(**) Models with soft top.
Minimum Ground Clearance / Typical Angles
Maximum Ground Clearance
– inches (mm) (A)Approach Angle (B) Departure Angle (C) Breakover Angle (D)
Wrangler Sport 9.3 (235) 35.2° 29.2° 23.9°
Wrangler Unlimited Sport 9.1 (232) 34.8° 29.9° 19.2°
Wrangler Sahara 10.2 (260) 37.4° 30.5° 26.2°
Wrangler Unlimited Sahara 9.5 (242) 35.4° 30.7° 20.0°
Wrangler Rubicon 9.9 (252) 36.4° 30.8° 25.8°
Wrangler Unlimited Rubi-
con9.9 (252) 36.0° 31.4° 20.8°
TECHNICAL SPECIFICATIONS
248

Minimum Ground Clearance (Reference A)
The clearance value is measured next to the
lower edge of the differential. This value also
defines those for the “Approach Angle” the
“Departure Angle” and the “Breakover
Angle”.
Dimensions are expressed in inches (mm)
and refer to the vehicle equipped with its
original tires.
Approach Angle (Reference B)
The approach angle is determined by the
horizontal line of the road surface, and by the
tangent line passing between the front wheel,
and the most projecting low point of the car.The wider the angle, the lower the chance to
hit an obstacle with the body or chassis, when
climbing a steep slope or overcoming an
obstacle.
Departure Angle (Reference C)
The departure angle is determined by the
same lines of the “Approach Angle”, and
refers to the rear part of the vehicle.
Breakover Angle (Reference D)
The value of the “Breakover Angle” is linked
to the ground clearance of the vehicle and
indicates the attitude of the vehicle to over-
come a wedge, more or less steep, preventing
the vehicle from resting on the ground with
the body or chassis after touching the wedge
with its lowest and most projecting parts
(usually the underbody), because this would
highly reduce wheel grip.The wheels, without a suitable grip to the
ground, will not have sufficient hold to move
the vehicle, and will surge.
The higher the ground clearance, the wider
the breakover angle. Always bear in mind that
the higher the ground clearance, the lower
the stability, due to a higher center of gravity
which reduces the side rollover angle.
Ground Clearance / Typical Angles
Measurements
249

WHEELS
Wheels And Tires
Rim Size Tire Size Tire Pressure psi (bar)
Sport Model 7.5J x 17 x 44.45 mm 245/75 R17 112T (M+S) 36 (2.48)
Sahara Model 7.5J x 18 x 44.45 mm 255/70 R18 113T (M+S) 36 (2.48)
Rubicon Model 7.5J x 17 x 44.45 mm LT255/75 R17C 111Q (M+S) 37 (2.55)
WEIGHTS
Mass Parameters
Axle Load / lbs (kg)
Curb Mass / lbs (kg)Allowable Maximum
Gross Mass / lbs
(kg)Max Payload / lbs
(kg)Max Roof Load / lbs
(kg)
Front Axle Rear Axle
Wrangler Sport
3.6L Gasoline2,224 (1,009) 2,590 (1,175) 4,135.9 (1,876) 5,099.3 (2,313) 888.5 (403) 99.2 (45) (*)
Wrangler Sport
2.0L Gasoline2,240 (1,016) 2,606 (1,182) 4,151.3 (1,883) 5,099.3 (2,313) 888.5 (403) 99.2 (45) (*)
Wrangler Sport
2.2L Diesel2,399 (1,088) 2,729 (1,238) 4,398.2 (1,995) 5,299.9 (2,404) 1,047.2 (475) 99.2 (45) (*)
Wrangler Unlim-
ited Sport 3.6L
Gasoline2,522 (1,144) 2,762 (1,253) 4,429.1 (2,009) 5,423.4 (2,460) 1,071.5 (486) 99.2 (45) (*)
Wrangler Unlim-
ited Sport 2.0L
Gasoline2,538 (1,151) 2,778 (1,260) 4,437.9 (2,013) 5,449.8 (2,472) 1,071.5 (486) 99.2 (45) (*)
TECHNICAL SPECIFICATIONS
250

Mass Parameters
Wrangler Unlim-
ited Sport 2.2L
Diesel2,698 (1,224) 2,901 (1,316) 4,671.6 (2,119) 5,698.9 (2,585) 1,322.8 (600) 99.2 (45) (*)
Wrangler Sahara
3.6L Gasoline2,247 (1,019) 2,601 (1,180) 4,135.9 (1,876) 5,099.3 (2,313) 855.4 (388) 99.2 (45) (*)
Wrangler Sahara
2.0L Gasoline2,264 (1,027) 2,617 (1,187) 4,151.3 (1,883) 5,099.3 (2,313) 855.4 (388) 99.2 (45) (*)
Wrangler Sahara
2.2L Diesel2,423 (1,099) 2,740 (1,243) 4,398.2 (1,995) 5,299.9 (2,404) 1,047.2 (475) 99.2 (45) (*)
Wrangler Unlim-
ited Sahara 3.6L
Gasoline2,546 (1,155) 2,791 (1,266) 4,429.1 (2,009) 5,423.4 (2,460) 1,000.9 (454) 99.2 (45) (*)
Wrangler Unlim-
ited Sahara 2.0L
Gasoline2,562 (1,162) 2,804 (1,272) 4,437.9 (2,013) 5,449.8 (2,472) 1,000.9 (454) 99.2 (45) (*)
Wrangler Unlim-
ited Sahara 2.2L
Diesel2,721 (1,234) 2,928 (1,328) 4,671.6 (2,119) 5,698.9 (2,585) 1,203.7 (546) 99.2 (45) (*)
Wrangler Rubicon
3.6L Gasoline2,306 (1,046) 2,681 (1,216) 4,332.1 (1,965) 5,299.9 (2,404) 848.78 (385) 99.2 (45) (*)
Wrangler Rubicon
2.0L Gasoline2,321 (1,053) 2,694 (1,222) 4,398.2 (1,995) 5,299.9 (2,404) 855.4 (388) 99.2 (45) (*)
Wrangler Rubicon
2.2L Diesel2,482 (1,126) 2,835 (1,286) 4,552.5 (2,065) 5,299.9 (2,404) 981.1 (445) 99.2 (45) (*)
251

Mass Parameters
Wrangler Unlim-
ited Rubicon 3.6L
Gasoline2,619 (1,188) 2,862 (1,298) 4,631.9 (2,101) 5,648.2 (2,562) 970.0 (440) 99.2 (45) (*)
Wrangler Unlim-
ited Rubicon 2.0L
Gasoline2,637 (1,196) 2,875 (1,304) 4,636.3 (2,103) 5,674.7 (2,574) 970.0 (440) 99.2 (45) (*)
Wrangler Unlim-
ited Rubicon 2.2L
Diesel2,795 (1,268) 3,016 (1,368) 4,843.6 (2,197) 5,798.2 (2,630) 1,197.1 (543) 99.2 (45) (*)
(*) Valid only for vehicles with hard top
equipped with roof rack. The hard top is not
designed to carry any additional loads, such
as after-market roof racks, spare tires, build-
ing materials, hunting or camping supplies,
etc.
FUEL REQUIREMENTS —
GASOLINE ENGINE
2.0L Engine
This engine is designed to meet all emission
regulations, and provide satisfactory fuel
economy and performance when using high-
quality unleaded gasoline with a recom-
mended RON of 97.While operating on gasoline with the required
octane number, hearing a light knocking
sound from the engine is not a cause for
concern. However, if the engine is heard
making a heavy knocking sound, see your
dealer immediately. Use of gasoline with a
lower than recommended octane number can
cause engine failure and may void or not be
covered by the New Vehicle Limited War-
ranty.
Poor quality gasoline can cause problems
such as hard starting, stalling, and hesita-
tions. If you experience these symptoms, try
another brand of gasoline before considering
service for the vehicle.
3.6L Engine
These engines are designed to meet all emis-
sions regulations and provide excellent fuel
economy and performance when using high-
quality unleaded gasoline with a minimum
Research Octane Number (RON) of 91.
Light spark knock at low engine speeds is not
harmful to your engine. However, continued
heavy spark knock at high speeds can cause
damage, and immediate service is required.
Poor quality gasoline can cause problems
such as hard starting, stalling, and hesita-
tions. If you experience these symptoms, try
another brand of gasoline before considering
service for the vehicle.
TECHNICAL SPECIFICATIONS
252

Besides using unleaded gasoline with the
proper octane rating, gasolines that contain
detergents, corrosion and stability additives
are recommended. Using gasolines that have
these additives may help improve fuel
economy, reduce emissions, and maintain
vehicle performance.
Poor quality gasoline can cause problems
such as hard starting, stalling, and hesita-
tions. If you experience these symptoms, try
another brand of gasoline before considering
service for the vehicle.
Materials Added To Fuel
Indiscriminate use of fuel system cleaning
agents should be avoided. Many of these
materials intended for gum and varnish re-
moval may contain active solvents or similar
ingredients. These can harm fuel system gas-
ket and diaphragm materials.
Fuel Icon Identification Compliant To
EN16942
The following symbols make it easier to rec-
ognize the correct type of fuel to be used on
your vehicle. Before proceeding with the sup-ply, check the symbols placed inside the fuel
filler flap (if present) and compare them with
the symbol on the fuel pump (if present).
Fuel IconsWhat It Means
E5Unleaded fuel containing up to 2,7 % (m/m) oxygen and a maximum ethanol content of 5,0 % (V/V)EN228compliant
fuel
E10Unleaded fuel containing up to 3,7 % (m/m) oxygen and a maximum ethanol content of 10,0 % (V/V)EN228compliant
fuel
253

Fuel IconsWhat It Means
Compressed Natural Gas and biomethane for automotive applicationsEN16723compliant fuel
Liquefied Petroleum Gas for automotive applicationsEN589compliant fuel
Diesel fuel containing up to7%(V/V) Fatty Acid Methyl Esters (FAME)EN590compliant fuel
Diesel fuel containing up to 10 % (V/V) Fatty Acid Methyl Esters (FAME)EN16734compliant fuel
TECHNICAL SPECIFICATIONS
254