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D4 MY2010 Periodic Hard Brake Pedal
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MrH
 


Member Since: 08 Aug 2007
Location: lost in the forest
Posts: 7754

United Kingdom 
D4 MY2010 Periodic Hard Brake Pedal

Last week or so I've noticed my brake padel go hard periodically, at the same time I get the distinct feeling that the brakes are binding as the car seems to be struggling to pull when this happens.

I know about the hard brake pedal issues on the D3 servo due to oil in it, but has anyone had this or similar on a D4?
 LRs are a fond memory, apart from the maintenance.  
Post #152844712th Sep 2015 8:05 pm
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AC51
 


Member Since: 29 Apr 2009
Location: north east lincolnshire
Posts: 30

United Kingdom 2015 Discovery 4 3.0 SDV6 HSE Lux Auto Santorini BlackDiscovery 4

I've had the same issue with my D4, break pedal switch fault the ecu thinks you are feathering the break pedal and puts a bit of pressure through the servo
  
Post #152956914th Sep 2015 8:16 pm
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MrH
 


Member Since: 08 Aug 2007
Location: lost in the forest
Posts: 7754

United Kingdom 

Thanks, will get it rechecked, but its been replced before and was checked for calibration only 6 weeks ago. Thumbs Up
 LRs are a fond memory, apart from the maintenance.  
Post #152957814th Sep 2015 8:25 pm
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Fitzy73
 


Member Since: 09 Feb 2014
Location: Truro
Posts: 2407

United Kingdom 2010 Discovery 4 3.0 TDV6 XS Auto Causeway GreyDiscovery 4

Mine failed to start earlier in the year as although I was pressing the brake pedal it didn't recognise this, so wouldn't start, but equally wasn't telling me to press the pedal to start the car.

The dealer did something, I think there was a service bulletin regarding the servo and that really improved brake pedal and brake feel. However, in the last few weeks the pedal feel has really changed again.
 Andy

 
 
Post #152961214th Sep 2015 8:56 pm
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Fitzy73
 


Member Since: 09 Feb 2014
Location: Truro
Posts: 2407

United Kingdom 2010 Discovery 4 3.0 TDV6 XS Auto Causeway GreyDiscovery 4

This was my original problem:

http://www.disco4.com/forum/topic126717.html
 Andy

 
 
Post #152961914th Sep 2015 9:05 pm
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