Windshield Washer check valve location 2015 LX 570

[JMC5000]

Hello,

My passenger side washer nozzle is not producing any flow and I suspect that the check valve has gone bad from the research I've been able to do on the site but, I cannot seem to locate the valve. Can anyone who knows of this issue provide me with the location of the check valve?

Thank you,
Jerry

 

[TeCKis300]

Hello,

My passenger side washer nozzle is not producing any flow and I suspect that the check valve has gone bad from the research I've been able to do on the site but, I cannot seem to locate the valve. Can anyone who knows of this issue provide me with the location of the check valve?

Thank you,
Jerry

It's under the cowl. See this thread

Post in thread 'LX 570 wiper nozzle replacement'

May 10, 2026

If your nozzles seem ok but one side still doesn’t spray much at all, check the splitter located on the underside of the hood. It has a check valve so the washer fluid doesn’t drain back. Sometimes they get damaged or clogged. It’s very cheap and easy to replace.

Thanks for the excellent hint. It was the check valve/splitter that was the culprit rather than the nozzle that was clogged. Probably also caused my leak at the reservoir as it looked like the windshield wiper circuit pump leaked from the pressure bypass with too much head pressure.

This $8 part is burried under the...

• TeCKis300

• 

 

[dudemancool1904]

They are literally behind the windshield washer nozzle. Easiest to access by removing the plastic side pieces next to the skid plate. I had two fail in a matter of months, they both leaked out all the washer fluid.