# HELP!! 01' NIssan Pathfinder "Load Sensing Valve"

**URL:** <https://forums.speedlife.net/t/help-01-nissan-pathfinder-load-sensing-valve/228776>\
**Category:** NYSpeed Automotive\
**Created:** [February 17, 2013, 12:58pm UTC](https://forums.speedlife.net/t/help-01-nissan-pathfinder-load-sensing-valve/228776 "2013-02-17T12:58:47Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Draftinwitjr3815](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/draftinwitjr3815/32/5349_2.png) [@Draftinwitjr3815](https://forums.speedlife.net/u/Draftinwitjr3815)\
**Post date:** [February 17, 2013, 12:58pm UTC](https://forums.speedlife.net/t/help-01-nissan-pathfinder-load-sensing-valve/228776/1 "2013-02-17T12:58:47Z")

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Helping a friend of mine with a brake pedal issue. Its a 01’ Nissan Pathfinder 4x4. I go to help and its clear there is a blown brake line or something of that sort because the pedal goes to the floor.

I get underneath to start looking for a leak and find this crazy-ass junction block above the rear axle with a huge spring and lever attached to it. Fluid is leaking from the seal on the piston/lever.

After spending 1/2 hour online trying to find a picture of this thing I find it to be a load sensing valve.

I can not find the part aftermarket, it may very well be dealer only, but I’d like to get this done asap.

Does anyone know where I may be able to find such a thing?

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**Author:** ![iwanagofast1](https://avatars.discourse-cdn.com/v4/letter/i/a9adbd/32.png) [@iwanagofast1](https://forums.speedlife.net/u/iwanagofast1)\
**Post date:** [February 17, 2013, 1:22pm UTC](https://forums.speedlife.net/t/help-01-nissan-pathfinder-load-sensing-valve/228776/2 "2013-02-17T13:22:59Z")

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Google Nissan Part number 46400-8B400. Compare for the best price, looks to be a $100dollar part ![http://www.courtesyparts.com/images/medium/r50/46400-R50002.jpg](http://www.courtesyparts.com/images/medium/r50/46400-R50002.jpg)

[http://www.courtesyparts.com/46400r-valve-assy-load-sensing-pathfinder-r50-02/1997-09/1999-wfed-4wdcal-4wd-2001-wp/4wda/4wd-09/1999-01/2000-p-204143.html](http://www.courtesyparts.com/46400r-valve-assy-load-sensing-pathfinder-r50-02/1997-09/1999-wfed-4wdcal-4wd-2001-wp/4wda/4wd-09/1999-01/2000-p-204143.html)

[http://www.mynissanpartstore.com/parts/index.cfm?make=Nissan&year=&searchText=46400-8B400&action=oePartSearch&siteid=214102](http://www.mynissanpartstore.com/parts/index.cfm?make=Nissan&year=&searchText=46400-8B400&action=oePartSearch&siteid=214102)

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**Author:** ![Draftinwitjr3815](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/draftinwitjr3815/32/5349_2.png) [@Draftinwitjr3815](https://forums.speedlife.net/u/Draftinwitjr3815)\
**Post date:** [February 17, 2013, 1:40pm UTC](https://forums.speedlife.net/t/help-01-nissan-pathfinder-load-sensing-valve/228776/3 "2013-02-17T13:40:55Z")

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Thank you so much!

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**Author:** ![iwanagofast1](https://avatars.discourse-cdn.com/v4/letter/i/a9adbd/32.png) [@iwanagofast1](https://forums.speedlife.net/u/iwanagofast1)\
**Post date:** [February 17, 2013, 1:45pm UTC](https://forums.speedlife.net/t/help-01-nissan-pathfinder-load-sensing-valve/228776/4 "2013-02-17T13:45:29Z")

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Found one for 98 dollars here. [http://www.trademotion.com/parts/index.cfm?searchText=46400-8B400&siteid=214143&year=2001&make=NISSAN&model=PATHFINDER&submodel=&vehicleid=1432945](http://www.trademotion.com/parts/index.cfm?searchText=46400-8B400&siteid=214143&year=2001&make=NISSAN&model=PATHFINDER&submodel=&vehicleid=1432945)