The Mahindra XUV 300's annoying rear wiper/washer behaviour

When the wiper stalk is depressed, the wiper starts before the washer sprays water.

BHPian krishnakumar recently shared this with other enthusiasts.

Hello BHPians and TBHP readers!!

I had earlier posted regarding an annoying behavior of the rear wiper/washer of Mahindra XUV300 in the Official Review thread.

When the wiper stalk is depressed, the wiper starts before the washer sprays water. This results in the wiper doing a full swipe (dragging all the dust and debris) across the rear windshield before meeting the water on its way back.

I noticed this annoying behavior right from day 1. At first, I assumed there was no washer fluid and that there could be a separate tank for rear washers (since no water was coming). Later, I realized that by continuing to keep the stalk depressed for a second the water comes out.

This essentially nullifies the use of washer if the wiper is anyway doing a full swipe without any fluid.

Obviously, I took the car to the service center to have a chat with the technical manager. He noticed the problem and said that it is a behavior in the MBFM itself and is likely due to the washer motor being in front. So the water is getting pumped at the same time as the start of wiper. However, since the water line has to build up pressure, there is a delay of 1-2 seconds within which the wiper does a full swipe.

I insisted on getting this checked on other cars and luckily there were 2 other XUV300s that had come for service. What I noticed was interesting. One of the cars had this wiper/washer working perfectly!!

Please see the videos below:

The annoying behavior served to you on a silver platter!

Video 1

Note: the above car is not mine but the behavior is identical in my car

The XUV300 where this works perfectly

Video 2

From this we confirmed that the problem is isolated to some cars. The only difference we could find was that the XUV300 in which this was working perfectly was a BS4 version and the other car (including mine) are BS6. The hypothesis is that the MBFM has this calibrated incorrectly in the BS6 version.

While I posted this on the official thread, there were very few responses on it confirming the behavior in their cars.

BHPians ashishk29 and Goandiaries confirming the presence of this behavior in their cars.

And BHPian mihir_m13 calling out a possibility that this existed.

The reason I'm starting a new thread is to bring attention to this problem and get a poll among XUV300 users (or BHPians who have XUV300s in their friends or family to check). The issue is small enough that a dealership would never bother bringing this up to Mahindra. For Mahindra, this might either be one of those known gaps small enough to not bother fixing, or they are completely oblivious to this bug.

In either case, I would like this thread to get the attention of the right folks. All it probably needs is one MBFM update with the wiper/washer motor calibrated to ensure the water comes as soon as or immediately before the wiper initiates the swipe. It already works for some of their cars - so maybe if it reaches the right ears, all it might need is a Ctrl+C and Ctrl+V.

Request to Mods:

* If this doesn't deserve a dedicated thread, please do merge with an existing thread.

* If you know anyone from the Mahindra's technical teams, please do help in bringing this to their notice.

Here's what BHPian sagarpadaki had to say on the matter:

There will be a one way check valve/non return valve installed after the washer fluid motor. That check valve ensures that the water remains in the pipe and does the flow back into the container. I think the check valve is faulty. Hence the delay in the water reaching the rear glass outlet.

I presume this happens only if you do not use the rear wash for a while? Maybe a few hours?

Get the valve replaced and see if the problem goes away

Here's what BHPian shancz had to say on the matter:

Based on the video I see that the problem car's spray seems pressurized while the one that works fine has a more free flowing nature. Could that indicate anything? Was it common in all other cars you checked ?

If yes then probably a blockage in the piping/nozzle which causes the lag ?

Could it be due to a motor going weak ?

FYI the wagonR (2016) has the same behaviour and it has the free flowing nature, worse flow than the 300 of course.

Although what your ASC explained is what I had thought too.

Read BHPian comments for more insights and information.