[Logodude]

First off my rain sensing wiper function does work. My car is an e90 '06 that has 52,xxx miles and I currently live in Hawaii. The problem is that this function does not work very well as while using the function the wipers simply don't wipe as fast as they should. I always have the function on its highest setting/sensitivity. Even on high it needs to be wiped long before it does its self. I have deposits on all my windows and paint. I believe it's "hard water" Could this be the problem? (I'm thinking it is) I'm comparing this to my other car ( '12 e92 m3) which this function works better with no complaints. (while driving this car I use the lowest setting/sensitivity and wipes the window clear perfectly)

If it is hard water does anyone know of a method or product to remove this effectively? note: I do not own a buffer nor have access to one.

[DJtoad]

Sounds like you should invest in a dual action orbiting polisher and correct both the glass and your paint. You don't have to spend hundreds if you can't afford it. Harbor Freight actually makes a decent one for around $70. With it you can easily correct the glass by using a felt pad and glass polishing compound and your wipers will work far better afterwards as well.

[fazman]

Originally Posted by Logodude

First off my rain sensing wiper function does work. My car is an e90 '06 that has 52,xxx miles and I currently live in Hawaii. The problem is that this function does not work very well as while using the function the wipers simply don't wipe as fast as they should. I always have the function on its highest setting/sensitivity. Even on high it needs to be wiped long before it does its self. I have deposits on all my windows and paint. I believe it's "hard water" Could this be the problem? (I'm thinking it is) I'm comparing this to my other car ( '12 e92 m3) which this function works better with no complaints. (while driving this car I use the lowest setting/sensitivity and wipes the window clear perfectly)

If it is hard water does anyone know of a method or product to remove this effectively? note: I do not own a buffer nor have access to one.

A lot of e9x owners don't know that with INPA you can reinitialize the RLS (Rain Light Sensor) and it will work like day one again. I would be willing to even bet you might have had your windshield replaced and no one reset it which started the issue you are seeing.

[patents]

I had he same problem, and I'm not sure but I think my windshield is original. I reinitialized the sensor in INPA and it works great now.

[Squark]

I also had a similar problem on a replaced windshield. I reinitialized the sensor using the Bavarian Technic tool and it started working properly again.

[Logodude]

Thanks a lot guys! A polisher of some sort is defiantly on my list to buy. I wasn't expecting this issue at all here.

Originally Posted by Squark

I also had a similar problem on a replaced windshield. I reinitialized the sensor using the Bavarian Technic tool and it started working properly again.

I have a inpa cable that uses the obd port. Alex coded some stuff on my car using this cable. Can I reinitialize the module with this cable? Their website talks about a round connected in the engine bay.

I belive I still have the factory windshield as it has the BMW emblem etched into it.

[adidoman]

Rain-x the windshield.. you won't have to worry about it wiping it as often

[fazman]

Originally Posted by Logodude

Thanks a lot guys! A polisher of some sort is defiantly on my list to buy. I wasn't expecting this issue at all here.

I have a inpa cable that uses the obd port. Alex coded some stuff on my car using this cable. Can I reinitialize the module with this cable? Their website talks about a round connected in the engine bay.

I belive I still have the factory windshield as it has the BMW emblem etched into it.

round is for older cars i think. dou have the inpa software installed/configured? if so... this is an easy fix

[Logodude]

I do not own a copy of inpa

[Wilt]

For hard water deposits on glass, go to a marine supply store and buy 'teak brightner' which has phosphoric acid in it. Not a strong acid, you can apply to area of glass with hard water deposits with a sponge.

Not sure what the chemical content is, but you might also try C-L-R (calcium lime remover)

Just don't drip it onto your paint, and flush immediately with water if you do.

[Rory]

Any way to reset without software ? I have the same problem.

Pulling a fuse ?

[hassmaschine]

good to know about the reset. I thought it was just a stupid design. Neither of our E9x's wipe consistently, my windshield will be obviously covered in water and I have to hit the stalk to see. The regular speed function is too fast for most cases. why couldn't they have given us a regular intermittent option?

Neither car has water deposits on the glass though. it sounds like the sensitivity just gets out of wack after a while? or maybe there's a rock chip right where the sensor is or something.

Actually, I still think it is kind of a stupid system. the wiper system in the E36 through the E46 was honestly a lot better. I always ran it at the lowest setting and let it do it's thing - perfect for the PNW drizzle..

[david in germany]

my next project.. My auto wipers suck...

[fazman]

Originally Posted by hassmaschine

good to know about the reset. I thought it was just a stupid design. Neither of our E9x's wipe consistently, my windshield will be obviously covered in water and I have to hit the stalk to see. The regular speed function is too fast for most cases. why couldn't they have given us a regular intermittent option?

Neither car has water deposits on the glass though. it sounds like the sensitivity just gets out of wack after a while? or maybe there's a rock chip right where the sensor is or something.

Actually, I still think it is kind of a stupid system. the wiper system in the E36 through the E46 was honestly a lot better. I always ran it at the lowest setting and let it do it's thing - perfect for the PNW drizzle..

Same could be said on why manufacturers have software tools only availble to them and charge an arm/leg to get access to it. just like the service bulletins or service manuels. just make it all public domain so we can fix these machines. Next question is why make most of the items that wear/tear in hard to get to places?

[PTinVT]

Can you code the automatic wipers OFF and use the sensitivity switch as the intermittent delay adjust?

[hassmaschine]

I think it's a different module

[Nitrousbird]

Originally Posted by Logodude

I do not own a copy of inpa

Download it...it is free.