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C4 - DS4 Owners :: Forums :: Citroen C4 Picasso and Grand C4 Picasso (B78) 2013 onward :: C4 Picasso and Grand C4 Picasso (B78) Ice and Satnav questions
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2017 Flair DAB faulty?
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Author Post
Waj1234   
Fri Feb 17 2023, 10:16am
Member No: #60502
Joined: Feb 16 2023
Location: West Yorkshire
 Is there a certain way to tune DAB on these nac units or possibly faulty?

I click the circle arrow to tune just same as for FM but it finds nothing?

Our Smeg+ system works perfect.
danlat1415   
Thu Mar 12 2026, 07:30am
Member No: #48933
Joined: Jul 17 2017
Location: UK
 I know this is an old thread but posting here for completeness and for anyone who may see it in future.

The C4 Picasso/Grand Picasso had a common fault on the roof aerial antenna where it would allow water into the internal parts of the antenna causing the DAB to slowly become intermittent and eventually fully fail.

Replacing the roof aerial fixes this issue.
It mainly affects the 2017 models.

Part number is 9815614880

It has 4 thin cables coming off it too and is accesses from inside the headliner through either the rear roof light hole, or the rear roof seat belt hole in the panoramic version.
1 User said Thank You to danlat1415 for this Post :
 Ap0qalypto (12 Mar 2026 : 08:56)
Ap0qalypto   
Thu Mar 12 2026, 08:59am
Member No: #52161
Joined: Sep 21 2018
Location: Republic of Serbia
 I had a similar issue but on 2009 C4P, water was entering around the antenna. I had to change roof lining, and I have permanently fixed the issue with water leak. But I would thought that Citroen has fixed this in later models.
danlat1415   
Fri Mar 13 2026, 09:56pm
Member No: #48933
Joined: Jul 17 2017
Location: UK
Ap0qalypto wrote ...

I had a similar issue but on 2009 C4P, water was entering around the antenna. I had to change roof lining, and I have permanently fixed the issue with water leak. But I would thought that Citroen has fixed this in later models.


This is a different issue.
The seal on the roof was fine - so no water leak on the head lining - but the seal on the actual aerial itself was poor, so water was slowly getting in to the circuit board inside the shark fin antenna on the roof, needing a replacement shark fin aerial.
 

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