BMW 645Ci Tire Pressure
BMW 645Ci model in 2005 has recommended tire pressure of 29 psi to 32 psi based on model year, trim and original equipment tire size.
All listed data and/or calculations are for informational purposes only. TirePressure.com does not warrant or make any representations regarding the accuracy of or the results of the use of this information. Always refer to vehicle owner's manual for recommended tire pressure settings. Never overinflate or overload a tire beyond its maximum capabilities listed on sidewall.
What should BMW 645Ci tire pressure be?
Recommended tire pressure for BMW 645Ci tires ranges from 29 psi to 32 psi, as set by vehicle manufacturer according to model's original equipment tire size and gross vehicle weight rating (GVWR) to optimize vehicle safety, performance and fuel efficiency.
Where to find recommended tire pressure for BMW 645Ci?
BMW 645Ci recommended tire pressure can be found in owner's manual, on a tire placard on the side of driver's door or door jam, on the trunk lid, in the console or on the fuel door. Tire inflation will be listed in psi (pounds per square inch), bar or kPa (kilopascals).
To check BMW 645Ci tire pressure you will first need to determine its recommended tire pressure for the front and rear tires. Take off tire valve caps and use a tire pressure gauge to check tire inflation in every tire. Adjust BMW 645Ci tire pressure to its recommended levels. If overinflated, let some air out by pressing down the center plunger in the valve stem. If underinflated, add air with tire inflator. Recheck tire pressure to make sure all tires are properly inflated. Replace the valve stem caps. Make sure to check tire pressure when tires are "cold" and have not been driven for at least 3 hours. Remember that the front and rear tire pressures may differ.
What is proper tire pressure for BMW 645Ci replacement tires?
If you replace BMW 645Ci original equipment tires with non-stock tires that have different size or load capacity, new tires may require substantially different inflation pressures. Use our tire pressure calculator to find proper tire inflation when switching to a different tire size.
What is recommended winter tire pressure for BMW 645Ci?
Tire pressure fluctuates with ambient temperatures. When temperatures drop, BMW 645Ci tires may lose approximately 1 psi of air pressure for every 10 degree Fahrenheit decrease. During winter BMW 645Ci tires can be inflated 3 to 5 psi above the recommended tire pressure settings to compensate for lower temperatures. Do not overinflate above the maximum tire inflation pressure value indicated on tire sidewall. Make sure to check tire pressure regularly in the winter to keep tires properly inflated for a safe ride on snow and icy roads.
Is BMW 645Ci equipped with Tire Pressure Monitoring System (TPMS)?
If your BMW 645Ci is built after 2007, it is most likely equipped with a Tire Pressure Monitoring System. Check owner's manual to see if your model has TPMS.
Why is BMW 645Ci tire pressure light on?
If BMW 645Ci TPMS warning light comes on and stays on, it means at least one of the tires is underinflated. If TPMS warning light goes on and off, fluctuating ambient temperatures may be the reason. If BMW 645Ci TPMS warning light flashes for 90 seconds when you start the vehicle and then remains illuminated, the TPMS is not functioning properly and you should have it serviced.
How to reset tire pressure light on BMW 645Ci?
To reset tire pressure light on BMW 645Ci, follow the instructions in owner's manual. If tire pressure monitoring system will not reset, there may be a problem with tire pressure sensors.