RD4 / RD45

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Test of forum posting speed

by xantia_v6 » 29 Jul 2026, 08:11 » in Forum News, Announcements and Issues

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As part of an ongoing investigation of performance of this forum, I have temporarily disabled the indexing of new posts in the forum search system.

To determine whether this has improved forum performance, please reply here if you have an undue delay (more than 10 seconds) when making a post.

I will revert the forum back to normal configuration...

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Ok, no more reports needed for now.
I need to investigate the forum source code and probably add some more diagnostics.

Replies: 13
Views: 221

Last post by xantia_v6
Yesterday, 18:00
Takata Airbag Recall Documentary

by GiveMeABreak » 06 Mar 2025, 17:55 » in Citroën
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Given the number of 'After-sales campaign' notices concerning Takarta Airbags I have been made aware of when looking up parts from PSA for members, I thought I would post a link to the following documentary that may be informative concerning the issue with these igniters.

According to Takata, the chemicals in the airbags’ explosive charge can...

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My DS5, VF7**************[VIN obfuscated, can be read by forum staff] should be eligible for recall, but my vehicle is in China and I cannot find the corresponding service provider. Could you please contact me officially and tell me how to handle this? ????_20251024002629_33_148.png
Replies: 28
Views: 72520

Last post by Wusw
23 Oct 2025, 17:32
PSA Electrical Diagrams - Wiring & Symbols Codes Index

by GiveMeABreak » 09 Dec 2023, 17:48 » in Diagnostics

PSA Electrical Diagrams - Wiring & Symbols Codes Index

The following will cover most basic equipment, but will exclude later systems & Tech.

PSA Electrical Diagrams Introduction - Function and Constitution of Codes
PSA Electrical Diagrams - Coding of Functions
PSA Electrical Diagrams - Component Coding
PSA Electrical Diagrams -...

Replies: 0
Views: 132153

Last post by GiveMeABreak
09 Dec 2023, 17:48
Citroen, DS Automobiles and Peugeot Official Part Number Requests

by GiveMeABreak » 15 May 2021, 13:55 » in Citroën
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Parts Service Announcement - 21st March 2025

Please note that there is a temporary disruption to our 'Parts Service', so we will be unable to provide any official parts for members at the present time. Please refer to the Post HERE for further info

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Disruption to Parts Service

As you may be aware, the consolidation of the old PSA to the Stellantis Group systems has resulted in both a merge of data tools and a requirement to migrate PSA accounts to Stellantis Systems.

This has caused some problems for organisations like ours and the Team are currently looking at the best way forward. This...
Replies: 3080
Views: 998581

Last post by GiveMeABreak
21 Mar 2025, 10:53
Airbag, Dashboard, Seat Belt & Airbag ECU Repairs

by GiveMeABreak » 24 Jun 2020, 17:01 » in Useful links
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Just for members to be aware that airbagteam.com based in the UK are offering a 10% discount to FCF members on any of their services.

The FCF does not endorse any company directly, but thought this would be of use to members.

Full details of their services and the discount can be found here:

Airbag, Dashboard, Seat Belt & Airbag ECU Repairs

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I don't have knowledge of the Peugeot, but the issue of a loose connection is known with several makes of car.
I doubt the piece of plastic holding the cable to the floor will cause an issue with the air bag light, but an intermittent loose connection in the plug and socket almost certainly will. Check for a good electrical connection within. Look...
Replies: 78
Views: 373911

Last post by Stonehopper
14 Mar 2026, 06:55
New PSA Heritage Parts for Classic Cars

by GiveMeABreak » 11 Oct 2019, 16:18 » in Citroën

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Parts for Classic / Older Citroen, Peugeot Renault Vehicles

This may be of interest to Members with older vehicles where getting parts is a struggle and for those not already aware of the site.

PSA are embarking on a project to provide some supplies of original and re manufactured parts for older vehicles and classics, and have made it a...

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anti-virus is blocking.......

Replies: 7
Views: 104655

Last post by Stickyfinger
16 Sep 2024, 21:28
Revised Easydiagnostics Discount Procedure

by GiveMeABreak » 03 May 2018, 17:22 » in Forum News, Announcements and Issues

Please note that there is a new procedure in place for members wishing to take advantage of a 15% discount off products from Easydiagnostics.

The old discount code that was entered into the checkout is no longer valid, as a result of the code being propagated over the Internet.

After discussions with Jim from ED today, we have agreed a new...

Replies: 0
Views: 104338

Last post by GiveMeABreak
03 May 2018, 17:22

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Nokia CK-7W Hands free fit to RD4 on C5 X7 Excl 09

by mikevybiral » 01 Apr 2020, 15:56

Hope to break into wiring on back of RD4 and use auto-mute, RD4 speakers etc.
Advice on connections would be welcome. (Car has aux connections in glove box).
Thanks,
Mike

Replies: 0
Views: 560

Last post by mikevybiral
01 Apr 2020, 15:56
C5 X7 RD4 to RT6 Inc HiFI Upgrade

by Martin1980 » 15 Jun 2019, 07:40

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Is it possible to replace the original speakers with those of HI FI System? I have everything amp,suwoofer,speakers and wires.

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Thanks for the schematics, but something is missing:
- the rear tweeters, where are the rear tweeters are connected too?
- the input in the amplifier from the head unit - from my knowledge the head unit doesn't have an output for the amplifier. So, if this is true from where I can get the signal for the amplifier?

Replies: 8
Views: 3575

Last post by Fortius
24 Feb 2020, 14:15
RD45 questions + Microphone installation C5 X7 + Amplifier installation

by EDC5 » 01 Jul 2017, 22:02
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Hi there, long time lurker, first time poster!

So I have replaced the RD4 in my '58' C5 with a RD45 (from a DS3), I used my Lexia to activate the fader for rear speakers and also activated the parking assistance etc.

My first question is about installing the microphone for the hands-free. I have removed the roof console an identified a two way...

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That MIC may not have noise cancelling features - which is why I asked, so may be the cause of the issue.
Replies: 232
Views: 58740

Last post by GiveMeABreak
13 Nov 2019, 18:05
Configuring RD45 via Lexia

by Jaguarr » 14 Nov 2018, 16:36

First post

Hello all
So I've bought RD45 replacement for the old RD4 to support BT music and phone in my Grand Picasso C4 2013.
I was able to configure the radio to work well (added the VIN to the radio using Lexia).

However, i can't see any option to enable the screen for adding Bluetooth menu.... as far as I know, I have screen type c and it should...

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If I remember correctly, on the 308 you need to also enable bluetooth hands-free (either in the BSI or screen configuration, I dont remember which) as if the earlier Nomad hands-free was fitted, so that the bluetooth screen display was enabled.

Replies: 4
Views: 2265

Last post by xantia_v6
27 Oct 2019, 13:11
Audio upgrade for wireless streaming Citroën C5 X7

by ml4600 » 14 Oct 2019, 18:28

First post

Hi

I’m new here. I hope this is the tight place as my local Citroën forum in Denmark where I live are closed. So hello to all of you.

So this is it. My dad died. Time has gone. And I’m now driving his car. And what a nice drive this is. A C5 X7 from 2008. It has originally fitted RD4 radio with bluetooth telephone and steering wheel buttons to...

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Ok, so from your description, it sounds like you have a basic RD4 system and additionally a hands free audio unit that is fitted behind the dash. It is this 'Nomad' unit that handles the bluetooth phone calls and also the Emergency calling (if you have the Citroen chevrons button and the SOS emergency buttons on the central fascia. This Nomad unit...

Replies: 2
Views: 1579

Last post by GiveMeABreak
14 Oct 2019, 19:07
Aux 2 will not configure RD4 (in a peugeot)

by Timmo » 09 Oct 2019, 19:07

First post

Evening,
after a bit of local scrap yard wondering picked up a couple of 5 disc cd changers for the cars, mine activated fine in the C2 through lexia, the wifes Partner B9 would not allow the aux2 port to be configured on pp2000, port one was fine (fitted the aux rca connector to the glovebox as the wiring was already inplace), but seemed what...

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The first time I tried to validate the port was on the original screen, had no luck then, hadn't played since, was only after foraging up the yard and finding lots of optional extras for mine and a repeat trip for other bits I saw for the Peugeot got me to playing around with it again,

Replies: 7
Views: 1530

Last post by Timmo
09 Oct 2019, 21:12
Citroen C3 2007 AUX LEXIA Activation

by g2143 » 24 Sep 2019, 18:05

First post

Hello all,

I have a Citroen C3 from 2007 and its radio unit is RD4, I have attached an aux cable into the back of the unit (I believe into AUX1 on the left side looking at it from the front) however it does not work when I try to play music. I believe it needs to be activated using a Lexia tool and put into Classic mode.

I am based in Kent, is...

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Welcome G !

Some of our members are Lexia/Diagbpx owners and have offered to help other members who have a need of diagnostic services.
Any charges will be minimal but you need to arrange this when contacting them to arrange a meeting.
Use the PM service to contact them initially.

Here is the thread with a list of those members and a map at the...

Replies: 1
Views: 1500

Last post by myglaren
24 Sep 2019, 18:43
Hands free kit for C5 X7

by atr » 18 Jan 2019, 08:58
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I own a C5 equipped with a RD4 radio that doesn't have the BT that enables it to serve as a mobile hands free. since I want to have the hands free option, I thought of the possibility to buy a RD45 radio and replace the existing one, but I think that it might be a little complicated (especially finding the right unit with the matching color panel...

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Well done, glad it’s all sorted. :-D
Replies: 39
Views: 6480

Last post by GiveMeABreak
25 Jun 2019, 22:19
Citroen C5 2006 Audio System

by giorgos13 » 01 Jun 2019, 18:59

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Hello guys, this is my first post. i Tried to find the topic somewhere else but i couldn't. Does anyone know if Citroen c5 audio system supports Dvd Disks or just CD ?

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Pet hate: Beautiful girls, pretty girls, even plain girls made ugly by metal piercings stuck in their face.

My car doesn't have the ugly bit of spare wire sticking out from the side of the panel spoiling the symmetry.

:rofl2: If thine eyes offend thee...

no wait, perhaps this will help alleviate your suffering (a tad)?...

Replies: 10
Views: 1827

Last post by MikeT
02 Jun 2019, 15:20
407 - Replacing display - MFD

by Pappi » 28 Apr 2019, 18:45

First post

Hello guys.

So my project with the 407 is continuing. It's a 2007.

The multifunction display is toast on it. The typical fault of lines and disappearing letters, as soon as it gets hot.

Been googling a lot and reading. There seems to be no repairing possibilities? If anyone knows it would be wonderful to try repairing it at home.

But I've been...

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Yes you can code the RD4 Head Unit easily enough with Lexia for a 2005 C5. Run a Global test and then select the Head Unit ECU, select and go into parameters / configuration / manual configuration and the options should be there.

Replies: 4
Views: 1547

Last post by GiveMeABreak
28 Apr 2019, 22:44
rd4 radio no responding on any button

by livada1950 » 23 Apr 2019, 17:05

First post

My car is peugeot 407 sw 1,6 hdi from 2009 year
PROBLEM: Sometimes after starting ignitio- no one button on radio have not respond but on the stearing weel i can invoke gas consuption.
Second day everything is ok.
sorry for my bad english
please help me

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thank you for your quick replay!
problem is only with buttons-there is nor responce on any button . i can not turn on radio.
controls behind steerig weel continue to work
tomorow I will take it to diag planet 2000

Replies: 2
Views: 1784

Last post by livada1950
23 Apr 2019, 20:59
partner B9 RD4 Aux ports

by Timmo » 09 Feb 2019, 11:08

hello hive mind,
ordered a pair of aux cables for our cars , fitted mine in my c2 RD4 and validated it on lexia no problem, poppped out to fit the wifes in the Partner, couldnt get the plug in, so looked properly and there is already a plug in the aux socket, has 3 wires that are nicely twisted together and go into the loom, so logically i...

Replies: 0
Views: 769

Last post by Timmo
09 Feb 2019, 11:08
Rd45 Peugeot 407

by vortexco » 04 Dec 2018, 15:21

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My 2007 Peugeot 407 has the factory fitted RD4 stereo.

I've tried searching the Internet and looking at various websites, but I'm only finding information for citroen cars.

Is it possible to fit a RD45 to my car so I can have Bluetooth audio streaming? Mine is the grey stereo.

Thank you.

Last post

I think this is getting a little too complicated for me.

I think I'm going to get a Bluetooth and dab rds transmitter. Not cheep but it'll give me Bluetooth and dab without losing any peugeot features by fitting an aftermarket stereo.

Thanks

Replies: 6
Views: 2067

Last post by vortexco
10 Dec 2018, 17:59
RD4 and iPhone

by tomjyoutwit » 03 Dec 2018, 15:26

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Good afternoon,

My aux cable has finally arrived for my RD4, when removing the stereo there is still an input slot available on the rear- which got me wondering whether you can get a cable to plug into an iPhone (or even my old iPod classic) so that I can control tracks from the steering stalk?

Or is it a case of the radio is too old and too...

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You can replace your RD4 with a RD45 that has Bluetooth for handsfree and music streaming. You will also require a new MFD or at the very least your current one reconfiguring.

There are a few posts on the conversion on the forum.

Replies: 3
Views: 1056

Last post by EDC5
03 Dec 2018, 18:28
Radio code

by vortexco » 30 Oct 2018, 15:27
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Just obtained a Peugeot 407 Sport SW 2.2 HDI.

It has the non GPS radio unit. I think it's called the RT4.

Is there a place that's cheaper than peugeot to get the code?also if I pull out the radio to get the serial number will the wiring come with it so it doesn't disconnect, or is the wiring fixed meaning as soon as I pull out the radio I'll be...

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Yes, just remembered you have the older RD4 - no great loss there display wise.
Replies: 18
Views: 4477

Last post by GiveMeABreak
15 Nov 2018, 18:13
Pioneer Stereo installation

by kamz58 » 11 Jul 2018, 19:33

First post

Hi Guys,

I have a 2007 C5 VTR 2.0HDI and I am looking to install this Pioneer unit.

My car currently has a single CD unit, photo attached.
I am really struggling to understand which connectors/adapters will I need to install it as I want to keep all the steering stalk controls and also the controls for the little display beneath the...

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Ive been looking to do the same thing on my Peugeot 407. The radio on mine looks that same as the climate controls as yours.

I've been in touch with Connects2 and have chosen the right products for my car.

Yes you will lose some functions, like the six display buttons on the left under the volume knob. However you will still be able to access...

Replies: 6
Views: 1477

Last post by vortexco
15 Nov 2018, 17:01
RD4 Pinout

by lancia58 » 05 Oct 2018, 18:32

First post

Hi

Anybody has the pin-out of the back connector of an RD4 head unit

Thanks

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This is one I have, but it's from the C5. I'm not sure if the C4 will be different.

IMG_2965.PNG

Replies: 5
Views: 4909

Last post by EDC5
05 Oct 2018, 20:16
Sluggish RDS

by RichardW » 02 Oct 2018, 20:27

First post

The RDS on the radio (RD4) in my 3008 is not keen on re-tuning to another station. The RDS is working as it picks up the station and the RDS text comes through, and alternative frequencies is turned on, but it almost never changes frequency. Is this a 'feature' - never a problem in the similar units in the 307 or C4 Picasso so I think not? Aerial...

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Do you know if the radio has (ever) had its firmware updated? This sounds like just the sort of thing that could be cured by an update. I don't know for sure if there's an update, I'm just fishing!

Replies: 1
Views: 869

Last post by Paul-R
02 Oct 2018, 20:41
2006 Citroen C5 audio system

by Takshaka » 03 Aug 2018, 17:54
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I have just bought a 2006 Citroen C5 1.6HDi 16v VTR estate and I am trying to figure out if there is a way to hook up an aux connection or a bluetooth connection (I don't have an owners handbook). I really only want to be able to play audio from my phone or tablet and be able to change the volume, not concerned about being able to change tracks...

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Modern cars especially PSA vehicles have complex electronic data networks that connect all the various electronic control units (ECUs). The main computer controls these units by sending digital data signals through the different networks. They can can stay on for a while after the vehicle is switched off and locked. Normally, they shut themselves...
Replies: 17
Views: 8415

Last post by GiveMeABreak
20 Aug 2018, 21:10
Dispatch / Expert RD4 Radio

by RPWC » 29 Jan 2018, 18:29

First post

Ok I know this may be a security related question, so if hecessary, can someone pm the answer if its something not to made publc. Is it easy to remove the radio? When I eventually get aother of these vans, I want to put my own radio in, which is better than the standard factory fitted item.

Last post

Many thanks for that Marc

Replies: 6
Views: 2041

Last post by RPWC
08 Apr 2018, 17:40
C5 RD4 upgrade options bewilderment

by MikeT » 22 Jul 2017, 14:09
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Like many before me I'm interested to know what options I have, as the lack of mp3 capability is unforgiveable for a 2005 model imo.

I've seen what looks like my RD4 but also has MP3 capability but wonder if there's something better that's also a straight swap and retains all the integrated functions (steering wheel controls, menu selections,...

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I am trying to send messages to a couple of members who are near me but my messages are sitting in the outbox for some reason.

That's normal and shows they're waiting for the recipient to read them, which will then move them to the SENT folder.

Never knew that lol. I thought may be its a restriction of some kind
Replies: 41
Views: 6932

Last post by kamz58
15 Dec 2017, 23:26

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