2018 BMW X3 Wiper Sizes & Tire Sizes
The short answer
The 2018 BMW X3 takes 26" driver and 20" passenger wiper blades (rear 11"), and came on 225/60R18 (xDrive30i), 245/50R19 (M40i) depending on trim.
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Wiper blade sizes
Tire sizes by trim
xDrive30i
225/60R18 104H · 32 front / 36 rear psi Search Amazon for 225/60R18 tires
M40i
245/50R19 · 32 front / 35 rear psi Search Amazon for 245/50R19 tires
The size on the placard inside the driver's door jamb is the one your car left the factory with. Match that, not this table, if they differ; a previous owner may have changed wheels.
Wheel specs and lug torque
Lug nut torque
101 ft-lbs (137 Nm)
Key fob, battery and sensors
Key fob battery
CR2032 Search Amazon for CR2032
Relearn
auto (the system detects the mounted tires after a short drive; reset in iDrive only for tires not in the pressure table)
Roof rack and roof load
Roof load limit
220 lb (100 kg), evenly spread, while driving
Dimensions, weight and fuel
Length
185.9" (472 cm)
Width
74.4" (189 cm), 84.2" with mirrors
Height
66" (168 cm)
Wheelbase
112.8" (287 cm)
Turning circle
39.4 ft (12.0 m)
GVWR
5,258 lb (2,385 kg)
Fuel
Gasoline
Octane
91 recommended, 89 allowed
Fuel tank
17.1 gal (65 L)
Worth knowing about the 2018 X3
- Wipers. The connector type is not confirmed, so choose blades listed for this model rather than by length alone.
- Tire chains. The manual permits tire chains or cables, within limits on which tires and which wheels. Those limits are in the next note; read them before you fit anything. Search Amazon for tire chains →
- Tires. Chains go in pairs on the rear wheels only, with 225/60R18 or 245/50R19 tires.
- Torque. Tighten lug nuts to 101 ft-lbs in a star pattern with a torque wrench, and re-check after the first 50 miles. This figure is from the owner's manual; an impact gun will overshoot it.
- Wheels. BMW uses wheel bolts rather than lug nuts, tightened crosswise.
- Roof load. The 220 lb roof limit is the dynamic figure for driving and includes the rack itself. It is not a limit for a rooftop tent when parked; the manual gives no static figure.
- Garage fit. Allow 15.5 ft of length and 7.1 ft of width with the mirrors out.
- Dimensions. GVWR is the xDrive30i figure; the manual rates the M40i at 5,412 lb.
- Octane. The manual recommends 91 octane for full performance and allows 89. 89 will not harm the engine; the higher grade is a choice, not a requirement.