BMW 3 Series - Leak Under Dashboard

Video transcript

0:02 So what's the story behind it? How long have you had the vehicle for? I've had it for three or four years, and before that was my dad's, and he bought it new. OK, so you know that dad's doing full history of it. Yeah, I know exactly what's happening. Do you want to talk us through where you've been finding the water?

0:19 Right, so I'll tell you what happened. I don't know how long it's been happening, but just before Christmas I dropped something on the floor and picked it up and I was like, flippin' hell, that is properly wet. Basically the footwell was very wet. I don't know if it still squidges now, but you know, there was plenty of water in there and this one can't. OK, so the passenger's, driver's side, front and rear. Okie dokie, so we've got a BMW 3 Series in today.

0:51 The car that has basically said about water being in the footwells, as you can see right now. Now, this is going berserk, so it's showing that it's wet all the way through. We've also got water up there, as you can see it's reading, back of the pedals, which is understandable. If we come into the rear driver's side of the footwell now, basically you don't want to have water in the underlay, because you can get things up to the mould and mildew, which start to build up and appear over time. And obviously mould isn't good for anyone.

1:28 In the long run you can also get electrical faults, which is not ideal, because then you have to call an electrician and spend a load of the money to get it fixed. But I'll show you this passenger side. It seems to be dry, this passenger side, which is good. So you can see there, it's not going off at all.

1:56 So that's good. Oh, it could go into the front passenger now. Let's take a little look and see what's going on. Take that out, pop that over to the side. Now, so you can see here, it's all nice and dry, which is good. So it means it's only one side that needs drying.

2:32 But what we do is, yeah, we're only strictly one side. But I know there is some work that needs to be done up here on the passenger side, so that's alright. What I'm going to do first is I'll show you basically what's sort of going on with the vehicle, if I get my twisty camera for you. So, as I was saying, got a twisty camera. But basically, so if you come over here, you've got a load of gunk build up underneath here, in this little channel there. What I have to do is if I get

3:18 that camera I can show you, with a torch. Turn that on. Right, so you can see in there what I was talking about. You've got all this gunk and leaves and debris. So you see down there, that's the main culprit, right. Got all this gunk build up on there. And basically what's happening is, you can see it looks all clean up here, but underneath the scuttle here's all blocked. And what's happening is the water is actually running, hitting the top of the leaves, and what we've found is

4:00 see this gasket back there, that black thing right there. The water has then bounced off the leaves onto that gasket, and that gasket's basically not sealed properly. So if I go into the vehicle, into the drivers footwell, and then come up into the bulkhead, it's a bit of a squeeze. And then if we take a little look, so you can see right there, that is that black gasket that I was showing you. And you can see all that water run marks coming off of it. You can

4:43 see how wet it is around that foam there. So what's going on is it's coming down here, its way all the way through into the footwell, and then obviously where it's being driven and everything like that's then passing through into the back footwell. You've got the same on the other side, but the other side's not leaking. But what we do is we take off that scuttle, completely reassemble it, clean out all the debris, and then what we're going to have to do is we have to get that gasket

5:08 out, seal it up and then put it back in. But it's a bit of an awkward position, so see how long it takes us. But fingers crossed we can do it as quick as possible; but obviously it's got to be done properly. And then yeah, so if I can take a part of that camera, come round to the rear of the vehicle, and I can show you over the air vents. Now, I mean, air vents have a lifetime about three years. Most people don't actually realise it. I mean, you can see by camera down here, you can see all that water in the

5:56 air vent there. Basically there shouldn't be any water in there, it should be sort of just bouncing off of it and not reaching the other side. What's going on there is it's going through. You can see there, they're absolutely soaked. So what we do is we get new air vents in and order them in, and then we will, in order to get to the air vents, like get the access, we've got to take these rear lights out first and so unclipped them, take them out. When we do that, even though they're fine, absolutely

6:25 working fine, no leaks, whatever, we'll re-seal them. And then once we get the bumper off we can get to the air vents, and then we stick new ones in, make sure it's all nice and primed, all nice and sealed up, nice and watertight. And yeah, I mean, in regards to drying the vehicle, what we have to do as well is we have to strip up all the underlay.

6:44 So we take off all this, take out the pedal, get rid of all this trim, and then take out the seats as well, don't forget them, and then suspend the underlay in the air, so basically there's no sort of contact on the body of the car. Because if you've got any contact where the underlay is touching the bodywork of the car, it's sort of the water, you can't get to it, so it stays there, stays stagnant.

7:07 So when you go to put it back down, you can get things such as mould and mildew build up in the future. So yeah, once we do that, we suck as much water out as we can. I know these BMW underlays are so thick, and they're like a proper chunk of foam. So the water just absolutely saps it up.

7:24 Loves it. So yeah, we have to suck the water out in this one, and then put it on dry. This one's gonna need, even though it's one size, it's gonna need two nights at least. Possibly three, because it's so wet. But yeah, I'll have to check with my colleague, but it should be two. Maximum is three.

7:41 So yeah, I mean apart from that, that's sort of it really. Door membranes are working fine. Your screen's fine as well. We thought it was going to be the screen, but as you can see we've taken off that bit of trim down there. And it's not the screen, which is fantastic. So yeah, that's all really.

8:01 What I do is I make up your estimate now, and you should sort of receive this video just before the estimates send off. So go have a little chat through emails, and then as soon as you get an estimate, give us a call back, let us know what you want to do. If you're watching this on YouTube or anything, then click the link down below, check us out. Right, so another little update video on the BMW 3 Series. Got the air vents, they've arrived nice and freshly packaged, so got them all prepped up ready to go, all nice and

8:33 cleaned there. So yeah, they can get put back in, bumper go back on, lights back on, all that rear end sorted. Got the carpet pinned up. This one's just down because we've had to get the grommet out, which I'll show you in a second. But you can see here, I just give this little squeeze, you see the water. I mean, we've let it drip for a day or just overnight and it's still soaking. So I'm going to get in here in the back, get as much of that water out. It's just as bad under here as well.

9:07 But yeah, that's just down because you won't come to the front. I'll show you, we've removed all the scuttle, moved the window wiper mechanism that was sitting there, and you can see there little hole. So you've got the grommet, which is right there. And yeah, so we've got to basically pull that through now and clean it up and then seal around it. And we've also got this little grommet up here, which we're going to pull out. But yeah, you can see that one down there, so we're

9:38 getting there really. Once that bump goes back on, then we can just crack on with this bit, the bit of the monkey, which is this. And then yeah, get her on dry, and then she'll be good to go. So just an update video, that's all. Right, so we've got the BMW 3 Series I believe, and it's currently undergoing our rain arch testing right now. As you can see, it's sitting there in the rain thing.

10:06 She had a nice little curtain to clean and tidy up the rim. Next step now is we'll get her out, get it all dried off. And then what we do is we check our leaks, like our fixes, make sure they're not leaking. And basically this is the second to last video that you're going to receive, and the last video I'll basically set a card ready for collection, and it'll be me and my colleague go around the vehicle, basically show you that's all nice and dry. But you'll put a free month code on

10:34 this one. Okie dokie, so we've got a BMW 3 Series here today, and it is basically the end video for it. So what I'm going to do is I'm going to go around the vehicle, basically show you that it's all nice and dry. As you can see there by the pedals, nice and dry. So this one had a leak. Right, there's a grommet under this steering column, and basically it was leaking through there. We've seen it before on another, I believe it was a 5 Series. And yeah, so a

11:17 bit of a job this one, just to get in there in the gaps and everything like that. What I'm going to do is go through the vehicle now and show you it's all nice and dry. You can see there, it's all clean and dry. I'll show you the passenger side as well, just to show you it's not wet. What we say now though is it's ready for its real world test. So basically you saw before, we had it under our rain arch, which is fantastic, don't get me wrong. I don't actually

11:49 believe anyone else has one, so they're pretty good. But yeah, it's only static, so the car's only stationary when it's under that rain arch. And obviously if you're driving down a motorway at 71 hour in the torrential rain, you can get water ingress in places that you wouldn't normally get in. So what we say is, after every sort of heavy bit of rain, all that stuff, just make sure that you sort of check it's dry where it used to be wet, and to check all the

12:24 regular spots, to make sure that it's all nice and dry. And just basically keep on talking really. You see there's nice and dry. So yeah, just sort of keep on top of it, and make sure you just keep checking where it was leaking from. But you can see cleaning up all the rims. It's got a three-month coating on it, this one as well, so basically this one's all ready to collect. So what I do is I get your paperwork all printed off, everything like that, and

12:58 then what we can do is you'll receive a text basically saying the car's ready to come and collect, so that's all.

Mar
17
2025

This BMW had wet carpets on the driver's side, which it was suspected was coming from under the dashboard.

Our inspection revealed that leaves in the scuttle area were blocking drainage holes, allowing water to raise to a level where it could pass a leaking grommet in the bulkhead.

We also found the rear air vents behind the bumper to be leaking.

Solution
We cleaned the scuttle of debris and resealed the leaking grommet. We also removed the lights and back bumper to access the rear air vents --  everything was cleaned and sealed as it was put back together.

The car was decontaminated to prevent mould, and the seats were removed and carpet lifted, so the car could be thoroughly dried.

Note
Leaks from under the dashboard are a common problem on BMWs, and it's usually caused by a leaking blanking plate. See our other #BMW videos for more information.

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