Water leaking into the boot from the fuel overflow - Interior / Exterior (Mk4 Mondeo) - TalkFord.com

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Water leaking into the boot from the fuel overflow

mondeo leak water boot fuel cover

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7 replies to this topic

#1 doo_dah


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Posted 14 October 2020 - 09:35 PM

I've recently bought a 2012 Mondeo (1.6 TDCI 115 PS) and noticed water in the boot under the spare wheel.


The water is getting under the fuel cover (another problem) and I think it's going into the overflow hole below the fuel hole and into the boot. I can't be sure exactly without looking at it properly. Is there a pipe which could have come off the overflow or is it all self contained inside the fuel holster. I can't see anywhere else the water could be going.


Also, there is a gap at the top of the fuel filler cover. Can this be tightened or should I replace it? Replacing it looks like a tricky job.



#2 doo_dah


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Posted 22 November 2020 - 04:36 PM

After lots of searching I think the leak is entering via some air vents underneath the rear bumper panel. I'm still not 100% sure yet. Has anyone else had this problem? I've attached a photo - does anyone know the part number or what the proper name is? Thanks.


#3 mdnewton


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Posted 22 November 2020 - 06:26 PM

I too noticed water under spare wheel, found out when I removed access cover for rear offside light cluster it was leaking, god knows where from, and accumulating at the bottom then spilling into spare wheel. Only does it in heavy rain, I put small towel on floor under rear light cluster and it gets soaked.....

#4 joey c

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Posted 22 November 2020 - 07:32 PM


Probably the vent behind the bumper my dads 2012 mk4 had the same issue the vent was snapped they’re only about £12 from ford
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#5 doo_dah


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Posted 23 November 2020 - 11:13 AM


Thanks for the replies. I'll remove the rear bumper sometime this week and focus water on that vent to if it is the problem. Can't find one online yet - Is there an online resource to get OEM part numbers for Ford? 



So far I've found 3 leaks. One from the rubber on the rear wiper arm, another on the drivers side rear light cluster and this one. It's like whack-a-mole.

Edited by doo_dah, 23 November 2020 - 11:25 AM.

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#6 TreborB


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Posted 23 November 2020 - 01:06 PM

Yes, look at your parts and get Ford part numbers off here




Find your veh and click on


Better still, put your vin number in and it should (repeat should) give you parts applicable to just your vehicle/model spec

BMW 320i M Sport 2019 Mineral Grey, Steptronic 8 speed ZF Auto

( Sorry but NO 2.3 Ecoboost 8 Speed Auto Mondeo's to be found!)


Focus 2018 Mk3.5, 1 Litre Ecoboost 140ps ST Line, SYNC3 Sat Nav, Parking Sensors, Colour Magnetic - Gifted to the Wife! Then Sold Aug 2019


Mondeo Mk5 Titanium 2L Ecoboost 240ps, X Pack, Body Kit, Rear Spoiler, 19" Alloys, LED Headlamps, Sony 12 Spkr Audio, Park Assist, Winter Pack, Rear Camera, Magnetic, Built Sept 2015,Sold Oct 2018.

Mondeo TitaniumX Sport 240ps 2L Ecoboost Powershift 2011 - Sold 2016 But Never Forgotten.

2007 - 2010, 4 New Focus ST225s

#7 tellmah


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Posted 23 November 2020 - 03:12 PM

Empty the boot and put talc around the areas you think it's coming from, then you'll be able to track it easier.

Mondeo 2.5T Tit X 2008, in panther black, sportspack and privacy glass. Never seem another model like it in my area.


Ford Escort, Morris Marina, Ford Granada, VX Astra Est, VX Cavalier x2, Rover 820, MK2 Mondeo

#8 Madman87


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Posted 03 January 2021 - 06:48 PM

Hi there, I have my gf my 2009 titanium and we noticed a few weeks ago the boot carpet was wet. Upon taking all boot interior out found it was wet and water pooling in both sides of the car around the wheel well area that is behind the second skin of metal. Between the second skin and the cars main skin there is the black vents you mention and water is pooling in a dip in this space . But I can’t find what is leaking and causing this water getting in. Was is definitely the black vents that were leaking? And why leaking ? I had to get a camera to put in the gap as you can’t see it due to the metal skin in the way.

Also tagged with one or more of these keywords: mondeo, leak, water, boot, fuel, cover

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