I changed the wheels from stock to 24

Only 1998 style valve stems will send the correct signal to the tire pressure control unit. If you can fit the 98 valve stems into the 2008 wheels, its worth a try. Also, you will need to reprogram the sensors in the wheels once they are on the car.

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that is the tire pressure monitoring system warning light, letting you know that one or more of your tire pressures is lower than spec. Some people have the light come on after service to wheels/tires. Damage to TPMS sensors is common when removing tires from wheels.

Hello,
Maybe we can help.

Set your tire pressure to the recommended factory air pressures. (to find this look at the placard that is located in your driver side door jam.) After setting all 4 tires to the correct pressure drive normally. If the TPMS (Tire Pressure Monitoring System) light doesn't turn off within 24 hours have the TPMS sensors checked at a local wheel and tire retailer or at the dealer. TPMS sensors have batteries in them that last an average of 5-7 years. If one of the batteries is dead it will trigger the system.

FYI, all of our stores can quickly troubleshoot your TPMS system and we stock most replacement TPMS sensors if you end up needing a new one. To find a local Discount Tire near you please visit www.discounttire.com/.

Per Tire Rack, for a 2001 330ci you could use 235/35-19 front and 245/35-19 in the rear. Wider tires for the same profile increase the tire's effective diameter(think wheel well gap above the tire) and will change both the odometer and speedometer readings. Additionally, the wider tires may cause rubbing of the fender or other components while turning unless the fenders are flared out.
Caliper clearance should be checked, usually M3 uses bigger calipers than stock. While they may look cool installed, there are several disadvantages to lolwer profile tires such as harsh ride, unforgiving of potholes/speedbumps, wider width is worse for snow application (cause that floating feeling). The 2008 wheel will have the tire pressure monitoring system (TPMS) .
Both have a bolt pattern of 5-120.

1. inflate your tires to the correct pressure (not just visually, but use a gauge)
2. your wheels have TPMS (tire pressure monitoring system) sensor attached to the rim on the filler stem, inside the tire. if that sensor has gone bad, your dash will register as having low tire pressure. replace that TPMS (little black box in the wheel. you have to remove the tire to get to it). If you have aftermarket wheels, you need to transfer the TPMS sensor from the stock wheel to the new wheel.

your tires should all be set to the same psi per your sticker on the door-including the spare tire. If one is under inflated, it'll do that.

That symbol (tire tread) could mean a low tire pressure. The majority of vehicles today have the low tire pressure warning system, which indicates that one or more of the tires are below the minimum tire pressure. Have the tire pressure checked in each tire. As for turning the warning light off, some vehicles the light will go out after tires are inflated properly. Have them check the owner's manual for resetting warning light. Please inform me as to whether or not it was the tires...thanks.

Hello.

Do you have a full-size spare tire? If so, it too is checked via the Tire Pressure Warning System. Perhaps it is low, this is quite commonly omitted when setting tire pressures. If you have a temporary spare tire, it is not checked. If you have no full-size spare, one of the TWPS sensors may have been damaged by your tire changer. This can happen very easily, if the changer is not careful whilst dis-mounting the tires. A Toyota dealership has a special service tool that will check each of the sensors for output, while on the car. If a sensor is found to be bad, the tester will find it.

Your tire pressure monitor needs to be reset whenever you change or rotate your tires...

1. check and make sure that your tires are inflated to the correct pressure

2. turn the ignition switch to the ON position. If the low tire pressure warning light comes on, push and hold the tire pressure warning reset switch (think the switch is in the glovebox, but not sure) until the warning light turns off and then release the switch.

3. now press and hold the tire pressure warning reset switch until the low tire pressure warning light blinks three times.

4. initialization is *not* completed until driving at the vehicle speed of 19 mph or over for more than one hour. the tire pressure monitoring starts when initialization is completed.

The tire pressure monitor detects any changes in the tire inflation pressure. Therefore, it must initialize and store it in its memory if the tires or wheels have been replaced, re-inflated or the tires have been rotated. You should be able to re-initialize the system by following these steps:

1. check and make sure that your tires are inflated to the correct pressure

2. turn the ignition switch to the ON position. If the low tire pressure warning light comes on, push and hold the tire pressure warning reset switch (think the switch is in the glovebox, but not sure) until the warning light turns off and then release the switch.

3. now press and hold the tire pressure warning reset switch until the low tire pressure warning light blinks three times.

4. initialization is *not* completed until driving at the vehicle speed of 19 mph or over for more than one hour. the tire pressure monitoring starts when initialization is completed.