[EQUANT]

Hi guys,

I've noticed a strange thing on my 2010 E90: in the vehicle status, the number of km until the front brake pads need replacing in increasing (instead of decreasing, as it normally should).

First time i bought the car it showed 80,000km (a lot, i know) and after a while it went up to 90,000km and never changed from there.

A few weeks ago the dealer did a complete software update on the car and the indicator showed 35,000km now, so i thought everything went back to normal. WRONG! It is still increasing, and now is at 38,000km, after driving for 2-3000km.

What's up with this? Anyone had this issue before or has any idea what could be causing it? I really don't have the time to bring the car in right now, so i was hoping for a quick fix or something

PS: the rear brake pad replacement indicator is working fine.

[Royal Flush]

I would assume there's not really a "quick fix" for this and the end result would be having you take it back to the dealership since it's most likely software related. Someone correct me if I'm wrong though.

[EQUANT]

The fact is that the car now has all modules up to date. It had this issue with the previous version and still has it with the latest software update.

I understand that the brake pads have a sensor on them, could that be mounted wrong, or something? Car had the front rotors replaced right before i bought it.

[fdriller9]

Condition based service adjusts to the driver's habits. If you are light on your brakes, the CBS will adjust the mileage/service interval accordingly.

If you brake heavily/often, the value will go down.

I wouldn't really worry about it. Once your pad wear sensor trips, you'll know you need to change them. That's really the only indicator that's important.

[Eights-n-Aces]

Wow, what a coincidence. I had my E93 in for service yesterday and I was checking the service reminders to make sure they were properly reset. I noticed that my Front Brake Pads were scheduled for 60,000 miles, which seems really high. I was going to post a similar question. I haven't noticed mine changing but I will keep an eye on it.

[EQUANT]

If it was the CBS adaptation i think it would do the same thing for the rear, but the issue is only present for the front pads. I drove about 13,000km since i bought the car and the front values never decreased at all, but increased, even though i did a lot of urban driving/braking.

Anyone know how much more can i drive the car after the brake wear sensor activates? I wouldn't want to be left with no brakes on a long journey, for example.

[chromisdesigns]

Originally Posted by EQUANT

Anyone know how much more can i drive the car after the brake wear sensor activates? I wouldn't want to be left with no brakes on a long journey, for example.

Dealer told me several hundred miles, minimum, when mine tripped.

[ENINTY]

Originally Posted by *********

Condition based service adjusts to the driver's habits. If you are light on your brakes, the CBS will adjust the mileage/service interval accordingly.

If you brake heavily/often, the value will go down.

I wouldn't really worry about it. Once your pad wear sensor trips, you'll know you need to change them. That's really the only indicator that's important.

This is correct. Just wait until the brake pad light comes on. Once it comes on you have a few thousand miles to get the brakes serviced with pleanty of saefty margin. When the light comes on there are at leat 3MM - 4MM of pad left, which is completely safe to drive with.

[fdriller9]

Originally Posted by EQUANT

If it was the CBS adaptation i think it would do the same thing for the rear, but the issue is only present for the front pads. I drove about 13,000km since i bought the car and the front values never decreased at all, but increased, even though i did a lot of urban driving/braking.

Anyone know how much more can i drive the car after the brake wear sensor activates? I wouldn't want to be left with no brakes on a long journey, for example.

Rear brakes tend to wear faster now a days on any modern car. Our BMW uses electronic brake distribution, EBD, to keep tires from losing traction. So your rear brakes are engaging side to side to help prevent traction loss.

Also, I believe cruise control uses the rear brakes to control the car's speed.

[EQUANT]

Why would the rear brakes wear faster? As far as i know, most braking force goes to the front.

Cruise control doesn't brake the car. I don't have adaptive cruise control on the car.

[fdriller9]

I just told you one of the reasons why the rear pads wear faster....

I'm pretty sure cruise control does something with the brakes. Ever have your car on cruise control and come down a hill?

My car maintains speed. It slows itself down. It doesn't downshift to engine brake. It probably uses the brakes.

I think the car uses the rear brakes because it's less noticeable when they engage. They are dragging. If you use the front, you may feel the car dip.

Also the front brakes are for stopping power. So are the rears but since they are smaller, it makes sense cc would use it maintain speed vs the front since you don't need slot of stopping power to maintain speed.

[EQUANT]

Originally Posted by *********

Ever have your car on cruise control and come down a hill?

Yes, and the car gains speed. I never noticed any sort of braking effect while using the cruise control in my car.

[fdriller9]

Originally Posted by EQUANT

Yes, and the car gains speed. I never noticed any sort of braking effect while using the cruise control in my car.

Mine always slows. Idk if that is the effect of no throttle being applied but I have never seen my car gain speed when in cruise. I always notice that it maintains the set speed.

[ENINTY]

Originally Posted by EQUANT

Yes, and the car gains speed. I never noticed any sort of braking effect while using the cruise control in my car.

The standard cruise control does brake the car. I've verified this many times. Just go on a dark road at night set the cruise for a speed, say 70 MPH, then rapidly reduce the speed setting to 55 MPH by quickly pulling back on the stalk 3 times as you go by some road signs and you will see the rear brake lights illuminate.

[Cgmiller63]

I think the reason the rear breaks wear faster on our cars is because they are rear-wheel drive. My front breaks always wore faster on my front-wheel drive cars.

[EQUANT]

Originally Posted by ENINTY

The standard cruise control does brake the car. I've verified this many times. Just go on a dark road at night set the cruise for a speed, say 70 MPH, then rapidly reduce the speed setting to 55 MPH by quickly pulling back on the stalk 3 times as you go by some road signs and you will see the rear brake lights illuminate.

I recall trying this once and the car just coasted along until it reached the lower speed that has been set, but i will give it another try and take a closer look.

[stratplaya06]

Guys, look at his car and location

I doubt he has the "Dynamic Cruise Control" option which is standard on the USA cars (can apply brakes when you pull back stalk). He probably has standard cruise control which does not, much like the 1er has.

This cruise is also different from "Adaptive Cruise Control", which can automatically apply gas or brakes according to the distance between you and the car you're following.

[EQUANT]

Originally Posted by EQUANT

Cruise control doesn't brake the car. I don't have adaptive cruise control on the car.

That's what i said earlier
Tried the cruise control and it does NOT brake the car!

ps: didn't know ACC was standard in the US, that's a nice feature