Strange feedback from brake pedal 325i

agarg · 09-29-2005, 01:17 AM

When I am driving in the rain and the wipers are on, I can feel the movement of the wipers thru the brake pedal. For example, I am stopped at a redlight and my foot is on the brake while the wipers are on..everytime the wipers move I can feel the movement transmitted thru the brake pedal! Is there some kind of connection? Do you guys notice this also? It just feels strange.

agarg

andreas · 09-29-2005, 03:34 AM

Yes, same here - feels a bit annoying, never had this with any car before.

Bimmer325iSE · 09-29-2005, 03:41 AM

I've noticed it as well.

RGB · 09-29-2005, 05:48 AM

I have read other posts in Spain about it. Probably it has something to do with the device that dries the brake discs when raining.

davinet78 · 09-29-2005, 06:58 AM

thats one thing that i have to look out for when it rains so far since i got the car it hasnt rained yet but it will soon

swu · 09-29-2005, 08:11 AM

Do you find the wipers kind of noisy when moving?

txusa03 · 09-29-2005, 08:27 AM

Yes, I also feel it through my brake pedals as well, very interesting. The wipers do not seem noisy to me.

wrtworld · 09-29-2005, 08:37 AM

What you feel it's the device that dries the brake discs when raining. Just feel safe that your car will be able to stop better when it's rainning

Dont worry about it. You just have to get used to it :rocks:

rebelfocus · 09-29-2005, 08:45 AM

So does anyone with a 320d or 320i feel this wiper movement through the brake pedal. If the above theory is correct, I would expect they wouldn't as those 4-cylinder models don't have DSC II (which dries the brake discs when it is raining by moving the pads close to the discs).

andreas · 09-29-2005, 09:01 AM

Quote:

Originally Posted by wrtworld

What you feel it's the device that dries the brake discs when raining. Just feel safe that your car will be able to stop better when it's rainning

Dont worry about it. You just have to get used to it :rocks:

Doesn't seam reasonable since it occurs when the car is at stop (break pedal applied). Brake discs can only be dried by pads if wheel is rotating.

nexus66 · 09-29-2005, 09:15 AM

Yeah - but since the drying is probably done by the abs module it could be giving an additional pulse whenever the wipers wipe! Seems a bit excessive though - pulsing the brakes everytime the wipers go! We need to find out if the 4cyl models do this too!

danatk · 09-29-2005, 09:21 AM

If this is true and it is the drying function, then why didn't BMW program the car to not pulse the brakes when the car is stationary?

BMW786 · 09-29-2005, 09:34 AM

I think the rain sensor on the windshield determines the speed of the wipers and motions the brake pads to dry the rotors as well, as some others have said.

MythMaker · 09-29-2005, 09:38 AM

It is definitely the wipers, I feel it in the clutch pedal when it is pressed down.

wongmb · 09-29-2005, 09:41 AM

So far I find the rain sensor is just annoying (never swipe at the speed I want, I want my intermittent manual adj back !) Door chime and uphill start assist is also annoying. I had a E46 before and I think it gives me just the right amount of gimmicks. The E90 is overdone. However its still the ultimate handling sedan.

jhbodle · 10-08-2005, 04:47 AM

I was just about to post a new thread about this very issue until I found this one! Happens to my Euro 325i too. It feels very strange to have the brake pedal pulse in time with the wipers.

Also, I believe that you still can have manual control of the intermittant wipe function via the column stalk even if you have auto wipers....

JamieA · 10-08-2005, 09:42 AM

Quote:

Originally Posted by jhbodle

Also, I believe that you still can have manual control of the intermittant wipe function via the column stalk even if you have auto wipers....

Yes, you turn the auto wipers off (press the button on the end of the stalk so that the green light goes out, then put the wipers into intermittent, the other switch on the wiper stalk should adjust the dwell time between wipes.

skimo · 10-08-2005, 11:12 AM

try driving bearfoot (ok ok i dont normally do that but...) you will definately feel the pules through the clutch and brake !! Scary actually...its alive !!!

Phoenix-IT · 10-09-2005, 02:13 AM

Quote:

Originally Posted by agarg

When I am driving in the rain and the wipers are on, I can feel the movement of the wipers thru the brake pedal. For example, I am stopped at a redlight and my foot is on the brake while the wipers are on..everytime the wipers move I can feel the movement transmitted thru the brake pedal! Is there some kind of connection? Do you guys notice this also? It just feels strange.

agarg

Maybe it's simpler than that... i.e. The wiper assembly is near the brake booster?

mike2 · 01-04-2006, 10:02 PM

Quote:

Originally Posted by swu

Do you find the wipers kind of noisy when moving?

yes, my wipers are very noisy due to zaggered movements just before it halts at horizontal position after returing from every wipe

I have complaint to my dealers 3 times and they have been saying i have to use the right screen cleaning solution and keep polishing my windscreen often. Things never improve even i ask my maid to clean my windscreen 2 times a day

I finally discover myself the locknut at the end the wiper arm is loosely fitted. I used a adjustable spanner to tighten it and my wipers have been serving me quitely ever since .

rebelfocus · 01-11-2006, 03:59 AM

I can feels the wipers pulse through the brake pedal on my new 320d when stationary. So, the above theory about this being related to DSC II's ability to dry the brake rotors when wet doesn't hold as the 320d has DSC I not II.

I have felt this before on cheap American and Japanese cars but am a bit surprised to see this on a newly designed BMW.

They should fix this.

tctic · 01-11-2006, 07:11 PM

Don't think it's the Brake Drying feature. This can be confirmed by not using the rain sensor. It's the movement of the wiper blades which is causing this pulsing. To me, the pulsing is very minimal. I did not even noticed it before I saw a thread on E90post.com on this. http://www.e90post.com/forums/showthread.php?t=8592

09-29-2005, 01:17 AM	#1
agarg New Member 1 Rep 15 Posts Drives: BMW 325i 2006 Join Date: Aug 2005 Location: Vancouver, BC iTrader: (0)	Strange feedback from brake pedal 325i When I am driving in the rain and the wipers are on, I can feel the movement of the wipers thru the brake pedal. For example, I am stopped at a redlight and my foot is on the brake while the wipers are on..everytime the wipers move I can feel the movement transmitted thru the brake pedal! Is there some kind of connection? Do you guys notice this also? It just feels strange. agarg
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09-29-2005, 03:34 AM	#2
andreas Registered 0 Rep 2 Posts Drives: e90 325i Join Date: Aug 2005 Location: Germany iTrader: (0)	Yes, same here - feels a bit annoying, never had this with any car before.
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09-29-2005, 03:41 AM	#3
Bimmer325iSE Private 9 Rep 84 Posts Drives: E90 325iSE Join Date: Jun 2005 Location: UK iTrader: (0)	I've noticed it as well. __________________ Bimmer325i ------------------------------------------------------- 325iSE, Sparkling Graphite, Black Leather, iDrive Pro + Voice Control, Logic 7, Xenon, 18" Wheels, Sports Steering Wheel & Seats, PDC F&R Deposit placed for E90 M3.
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09-29-2005, 05:48 AM	#4
RGB Private First Class 9 Rep 178 Posts Drives: 325i Auto.Active Steering Join Date: May 2005 Location: Sevilla Spain iTrader: (0)	I have read other posts in Spain about it. Probably it has something to do with the device that dries the brake discs when raining.
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09-29-2005, 06:58 AM	#5
davinet78 Lieutenant Colonel 28 Rep 1,832 Posts Drives: bmw e90 320d Join Date: Jun 2005 Location: gibraltar(europe) iTrader: (0) Garage List 2005 bmw 320d E90 [0.00]	thats one thing that i have to look out for when it rains so far since i got the car it hasnt rained yet but it will soon __________________ e90 320d,arktis,lumber support, hifi speaker, alarm, dakota beige, 162 18", xenon with washer spray,window chrome trimmings, professional radio, 6 cd changer wood trimmings 6 speed manual.
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09-29-2005, 08:11 AM	#6
swu Private 1 Rep 65 Posts Drives: E90 325i Join Date: Jul 2005 Location: Toronto iTrader: (0)	Do you find the wipers kind of noisy when moving?
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09-29-2005, 08:27 AM	#7
txusa03 Major General 556 Rep 6,563 Posts Drives: TS330iPPSP6MT Join Date: Jul 2005 Location: Planet Earth iTrader: (3)	Yes, I also feel it through my brake pedals as well, very interesting. The wipers do not seem noisy to me.
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09-29-2005, 08:37 AM	#8
wrtworld New Member 0 Rep 16 Posts Drives: Join Date: Mar 2005 iTrader: (0)	What you feel it's the device that dries the brake discs when raining. Just feel safe that your car will be able to stop better when it's rainning Dont worry about it. You just have to get used to it :rocks:
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09-29-2005, 08:45 AM	#9
rebelfocus Second Lieutenant 31 Rep 282 Posts Drives: 520d SE Touring Join Date: Jul 2005 Location: Cork, Ireland iTrader: (0)	So does anyone with a 320d or 320i feel this wiper movement through the brake pedal. If the above theory is correct, I would expect they wouldn't as those 4-cylinder models don't have DSC II (which dries the brake discs when it is raining by moving the pads close to the discs).
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09-29-2005, 09:15 AM	#11
nexus66 Second Lieutenant 64 Rep 239 Posts Drives: F80 M3 Join Date: Apr 2005 Location: Scotland iTrader: (0)	Yeah - but since the drying is probably done by the abs module it could be giving an additional pulse whenever the wipers wipe! Seems a bit excessive though - pulsing the brakes everytime the wipers go! We need to find out if the 4cyl models do this too! __________________ Drives: BMW F80 M3 - Sahkir Orange
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09-29-2005, 09:21 AM	#12
danatk Enlisted Member 6 Rep 48 Posts Drives: 330i Join Date: Sep 2005 Location: London, UK iTrader: (0)	If this is true and it is the drying function, then why didn't BMW program the car to not pulse the brakes when the car is stationary?
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09-29-2005, 09:34 AM	#13
BMW786 Lieutenant 28 Rep 537 Posts Drives: SGraphite90 Join Date: Jul 2005 Location: South Bay, CA iTrader: (1)	I think the rain sensor on the windshield determines the speed of the wipers and motions the brake pads to dry the rotors as well, as some others have said.
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09-29-2005, 09:38 AM	#14
MythMaker Enlisted Member 5 Rep 33 Posts Drives: 325i Red M6,Nav+L7 Join Date: Apr 2005 Location: Allentown, PA iTrader: (0)	It is definitely the wipers, I feel it in the clutch pedal when it is pressed down.
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09-29-2005, 09:41 AM	#15
wongmb Private 4 Rep 78 Posts Drives: 2006 325i SP Join Date: Sep 2005 Location: Markham, Ontario iTrader: (0)	So far I find the rain sensor is just annoying (never swipe at the speed I want, I want my intermittent manual adj back !) Door chime and uphill start assist is also annoying. I had a E46 before and I think it gives me just the right amount of gimmicks. The E90 is overdone. However its still the ultimate handling sedan.
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10-08-2005, 04:47 AM	#16
jhbodle Captain 147 Rep 899 Posts Drives: F90 M5 Join Date: Mar 2005 Location: UK iTrader: (0) Garage List 2007 E92 335i M-Spo ... [10.00] 2005 E90 325i SE (E ... [0.00]	I was just about to post a new thread about this very issue until I found this one! Happens to my Euro 325i too. It feels very strange to have the brake pedal pulse in time with the wipers. Also, I believe that you still can have manual control of the intermittant wipe function via the column stalk even if you have auto wipers....
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10-08-2005, 11:12 AM	#18
skimo Lieutenant 93 Rep 532 Posts Drives: 2011 335 vert Dinan II Join Date: May 2005 Location: Austin Texas !! iTrader: (1)	try driving bearfoot (ok ok i dont normally do that but...) you will definately feel the pules through the clutch and brake !! Scary actually...its alive !!!
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01-11-2006, 03:59 AM	#21
rebelfocus Second Lieutenant 31 Rep 282 Posts Drives: 520d SE Touring Join Date: Jul 2005 Location: Cork, Ireland iTrader: (0)	I can feels the wipers pulse through the brake pedal on my new 320d when stationary. So, the above theory about this being related to DSC II's ability to dry the brake rotors when wet doesn't hold as the 320d has DSC I not II. I have felt this before on cheap American and Japanese cars but am a bit surprised to see this on a newly designed BMW. They should fix this.
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01-11-2006, 07:11 PM	#22
tctic Major 40 Rep 1,238 Posts Drives: BMW E90 Join Date: Oct 2005 Location: Canada iTrader: (0)	Don't think it's the Brake Drying feature. This can be confirmed by not using the rain sensor. It's the movement of the wiper blades which is causing this pulsing. To me, the pulsing is very minimal. I did not even noticed it before I saw a thread on E90post.com on this. http://www.e90post.com/forums/showthread.php?t=8592
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