Do you hear silence from the speakers, crackling, or is MMI rebooting in a loop? We repair Audi Bose amplifiers fitted in Audi A6 C6, Q7 4L, A8 D3 and TT 8J. Send just the module with a description of the symptoms, and we will check it in the workshop.
The Audi Bose amplifier is a factory sound amplifier fitted to selected Audi models: A6 C6 (2004–2011), Q7 4L (2006–2015), A8 D3 (2002–2010) and TT 8J (2007–2014). The electronics are made by Bose.
You will find the part number on the housing label. Example references include 4L0 035 223A, 4L0 035 223D, 8J0 035 223A and 8J0 035 223F. We service Bose amplifiers from these Audi models.
In your enquiry, send a photo of the label with the part number and describe the symptoms. For service, send only the removed module — we check the module in the workshop, not the car.
What is happening to your amplifier?
The symptoms help describe the fault. We confirm the cause after checking the removed module.
Complete loss of sound
The audio system is silent despite the MMI being switched on. After checking the module, we determine whether the cause is a fault in the amplifier or the connections and outline the repair.
Partial loss of sound
Sound works only through some speakers, or some channels are much quieter. We check the amplifier circuits, damaged components and connections.
Crackling, whistling and noise
Loud crackling, whistling or noise and sound distortion appear. We identify the cause after diagnosing the module and remove electrical faults or corrosion.
Resetting or no MMI
The MMI system may reset or fail to start. After checking the module, we will confirm whether the amplifier is involved and outline the repair.
Component Protection lock
Only one speaker works, and diagnostic testing shows channel 47 fault. The system may remain locked even with a fully working amplifier, so we confirm the cause after checking the module.
Audi Bose amplifier — processor before repairAudi Bose amplifier — processor after repair
How do we repair the amplifier?
Module diagnosis
We connect the removed module and check communication, faults and module operation. After inspection, we confirm the scope of work and the price, and start the repair after your approval.
Cleaning and repair
We remove corrosion, rebuild tracks and replace damaged electronic components. In the event of water damage, we clean and protect the circuits, then test operation.
Testing and shipping
After repair, we test the unit, check communication and system operation. We return the safely packaged module and issue a VAT invoice and a written warranty.
Repair or new/used amplifier?
We rebuild your unit instead of replacing it with another one. Before repair, we confirm the scope of work and the price, and we start the work after your approval.
You do not need to bring the vehicle in. Describe the problem and we will help you work out what to remove and send. After inspection, you will receive a quote for approval — only then will we start work.
Write what is happening in the vehicle, state the make, model and year. Add a photo of the device, the error screen or the nameplate sticker, if you have one. On that basis, we will initially assess whether we can help.
02
We will help you work out what to send
Not sure whether to remove the radio, screen, amplifier or another unit? We will advise which component to check, how to prepare it for shipping and how to pack the parcel safely.
03
We confirm the fault and quote for the work
In the workshop we carry out diagnostics, confirm the source of the problem and define the scope of work. We send a quote for approval. We only start work after your approval.
04
We repair, test and return
We remove the cause of the fault, test the device and send it back safely packed for refitting. Every repair we carry out is covered by a warranty.
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
Many thanks to the entire OEMatic team for repairing the radio in my Lexus CT. Professional and reliable service. I can wholeheartedly recommend this workshop! Problem: black screen, no working radio, no interaction with the radio at all.
Jan Bał
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
Highly recommended! My OEM JBL amplifier from a Toyota (CHR, 2017) suffered a short circuit, and other audio workshops would not agree to repair it. Here the problem was solved extremely quickly. They received the parcel on Monday, and by Thursday the repaired unit was back with me. Excellent communication at every stage, and most importantly – the price includes a 24-month warranty. Complete professionalism!
Mateusz Janiczek
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
A service absolutely worth recommending. After years of problems with the infotainment head unit in my Skoda Superb constantly freezing and resetting, the MIB was finally repaired. The main dealer could only offer a replacement with a new unit for 3500 eur (!), other car audio companies could not help, and OEMatic carried out the repair in 1 day.
Piotr Nofski
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
I recommend them wholeheartedly….I don’t know how they did it, but they decoded the radio from an Iveco Daily 2020 faster than it takes to pack the parcel with the radio…One workshop promised a lot, but failed and said the radio was only fit for scrap. I highly recommend them — complete professionalism and a good price. Best regards.
autoodnowa u.
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
I can definitely recommend them. Mr Tomasz repaired my BOSE amplifiers, RNS, NTG navigation units and more. Always 100% successful, fantastic customer approach and a convenient online platform for placing repair orders.
Piotr Brzezina
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
I recommend OEMatic — only 3 days passed from sending the radio to the workshop and having it fitted back in my car. The radio from a Mercedes ML W164 2007 NTG2 BE 6089 had its fault diagnosed extremely quickly, and the repair was carried out just as fast. Communication with Mr Tomasz was excellent, and updates from the workshop on the progress of the repair were sent promptly. This is definitely a workshop other people can learn from. An obvious 5 stars from me.
Adrian
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
I had a problem with my Audi A3 8V, with no sound from the factory multimedia player. The guys solved the problem in a few days. I recommend them!
Rafał Niżnik
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
Service and expertise 100%. Thank you for helping with my RNS 315 radio. Highly recommended!
Michał Tuz
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
VW Touran radio, I sent it to the company because the reversing camera was not working and the radio would not turn on. Sent by courier. Diagnosis: no faults. (the fault needs to be looked for elsewhere) The radio was sent back quickly and the company did not charge anything, not even for the return postage. There probably aren’t many honest companies like this left here in Poland. Many thanks.
John Doe
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
Definitely recommended. Very fast repair and very good, speedy communication. Information was available at every stage of the repair request process — an online repair management system. The unit (radio) was already meant to be written off and replaced with another used one. Fortunately, I accidentally found the OEMatic blog while looking for a replacement, and it saved me from replacing it with another used unit, which would have been a loss for the appearance (the fronts of the replacements I found were not in such good condition, and all of them were older than my unit from pre-facelift models); the newer ones were more expensive than the repair. So that’s a plus too.
Artur Kozubski
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
RNS 315 radio with faulty Bluetooth. The radio sounds better than new. Others gave up on the repair, OEMatic handled it efficiently and quickly without any problems. We need more professionals like this. Thank you for the repair.
Krzysztof Szaboń
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
Professionally carried out repair of a factory VW radio, excellent communication, complete professionalism. May there be more companies like this in Poland.
Sławomir Pobłocki
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
I left a Honda Jazz radio panel for repair. In addition to the radio, the guys also repaired the CD player at the same price, even though I hadn’t asked them to. I also received spare bulbs for the button backlighting. Very friendly and professional, the radio and player work flawlessly. I recommend them with a clear conscience. Such expertise is rare nowadays.
b nowicki
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
Highly recommended. ZENEC radio after the pin was blocked. Code removed. Radio works, old pin. Fast, 1 day. Telephone contact without any problem. Parcel safely packed.
Stefan Nowak
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
For a long time I’d been battling an annoying problem in my VW Passat B8 — the car radio kept losing sound. Fortunately, I found OEMatic Car Media Lab and it was a perfect choice! From the first contact it was clear there was professionalism and huge knowledge of factory audio systems. Quick diagnosis and an even quicker (and most importantly: EFFECTIVE!) repair! The result? The radio plays crystal clear, with no dropouts or interruptions. You can tell the fault was removed at the source, not just temporarily masked. If you have any problems with factory audio, navigation or the radio in your car (especially VW, Audi, Skoda!), I definitely recommend OEMatic Car Media Lab. True experts!
Łukasz Puziak
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
The Harman-Kardon amplifier in my BMW F33 was flooded, so I decided to hand it over to OEMatic. A quick check to see whether it could be saved — yes! it could! A few days later the amplifier was back with me after repair.
For a moment I also had doubts whether only the amplifier had been damaged by the flooding, because I lost the ability to set the time and information such as instant fuel consumption or average fuel consumption disappeared; after a phone call I was told that this can happen because of a break in the car’s CAN circuit due to the amplifier being absent.
The theory proved correct, and fitting the already repaired amplifier helped and all the functions returned.
I hope the amplifier will serve for a long time to come and without faults.
I honestly RECOMMEND IT!
Michal Marecik
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
A great company, they will help you in any situation when it comes to navigation. Two companies from the Małopolskie region where I live suggested replacing the unit; at the authorised service centre the fault repair would cost 1400 ,- and they helped me fix it, and over the phone 😃
Miroslaw Syty
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
The content of the reviews I read quickly convinced me to have my unit repaired at OeMatic. I expected the highest quality of service at every stage and that is exactly what I received. After the phone call I received all the information needed for shipping by text message. As soon as the workshop received the parcel with the radio, I got a phone call, we agreed the details, I confirmed the price and the repair began. In the afternoon of the next day I was informed that the repair had been completed, I settled the bill and the radio was back with me after 4 days. It seems there is no room for even the slightest shortcoming in this company (such as a delay with a text message). For me, this is the highest quality. Thank you very much for the repair and I wish you success🙂
Dawid
Ania Łyszkowska
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
Professional and reliable service. The fault was initially diagnosed remotely, and the repair cost estimated. The unit was delivered to the workshop and collected remotely by courier. Everything was fast, straightforward and efficient. The car audio came back to life 🙂 I can recommend them with a clear conscience.
Bartłomiej Machnik
Rating 5 out of 5. ★★★★★GOOGLE REVIEW
Five stars is not enough.. OEMatic solved the problem with a non-working USB port (motherboard repair) in the factory navigation system from a Kia Sportage in express mode. Highly recommended.
KJ
Before you send your Audi Bose amplifier
A few practical answers about the amplifier and the enquiry procedure.
How can you tell whether the amplifier is to blame?
You can first check continuity of the MOST bus with a fibre-optic loop, or send the module to us. Once we receive the module, we will carry out diagnostics and confirm the cause.
What should you do if the amplifier has been flooded?
Send the module to the workshop. We will check the extent of the corrosion, clean the board, replace damaged components and protect the electronics against corrosion.
Where can I find the amplifier part number?
The number is on the sticker on the module casing. Take a photo of the label and send it with your enquiry — this will speed up identification.
Will I be charged for diagnostics if I decide not to go ahead?
No. If you decline, the unit cannot be repaired or the fault lies outside it, diagnostics and return shipping are free. We start the repair after your approval.
Audi
Jan Bał
Mateusz Janiczek
Piotr Nofski
autoodnowa u.
Piotr Brzezina
Adrian
Rafał Niżnik
Michał Tuz
John Doe
Artur Kozubski
Krzysztof Szaboń
Sławomir Pobłocki
b nowicki
Stefan Nowak
Łukasz Puziak
Michal Marecik
Miroslaw Syty
Ania Łyszkowska
Bartłomiej Machnik
KJ