1 hour ago, Marci1229 said:

I understand that, but unfortunately they can now assume that the problem is caused by the 4 speakers. This is not about just an engine failure.

No, they cannot. Drawing a parallel to computers, that would be similar to denying warranty on the graphics card because it broke while your CPU was overclocked. 

Edited 2 December, 20223 yr by Jorgeminator

On 02/12/2022 at 13:40, Jorgeminator said:

No, they cannot. Drawing a parallel to computers, that would be similar to denying warranty on the graphics card because it broke while your CPU was overclocked. 

I really don't know how does this works.

I've never read so much junk in all my life; - replacing the speakers cannot be "detected" without physically opening up the door and checking! This type of nonsense is typical of dealership service advisors, who in reality, know SFA about cars anyway, and is completely unnecessary scaremongering and anybody with an ounce of technical nouse would laugh at whoever came out with that little gem! 

I probably wouldn't replace 4ohm drivers with 2ohm, but then again, I don't know of many 2ohm drivers either, so that's a moot point anyway. The reason you shouldn't change impedance is purely to avoid additional extra load on the output stage of the amplifier module, however most aftermarket speakers are 4ohm anyway so that's fine.

As for this invalidating your warranty - I'd love to see that stand up in a court of law. What utter tosh; if you uprate the brakes, that does not invalidate the warranty on your seat heaters! 

Edited 20 February, 20233 yr by wardth

On 02/12/2022 at 13:28, Marci1229 said:

I talked to one of the people and he said that unfortunately I can't install the speakers you recommended because it would void the warranty.

You can tap the wires before the plastic connectors, solder new ones there to connect the new speakers and enjoy. The wires are wrapped in black soft cloth tape - unwind it, tap there, rewind. If issue that requires warranty - remove speakers, remove wire and re-wrap and reinstall original equipment - the original nuts are easy to get.

 

Technically I agree with wardth but my dealer also said replacing speakers would void the warranty of the infotainment (not the whole car) and audio stuff. I know some have been using this blackmail putting the whole car on the table - if you bring that to court they`d have a very sweaty session and will pay the court fees when all their claims have been disqualified.

Edited 9 March, 20233 yr by MP1983

On 30/11/2022 at 15:57, Felix2021 said:

@Marci1229 just 2 weeks ago i have replaced speakers in my O4 and made sound deadening of the doors. Highly recommended. Difference is night and day.

I went with Focal IS VW 165 speakers in the front and IS VW 155 in the back.

Hi I just found this post. Could you let me know some details of the install? I am going to do this ASAP, the sound is the only thing I don't love about the car so far. 

If you've a link to any step by step instructions/video it would be amazing. Otherwise just general advice would be great!

On 30/11/2022 at 19:00, Felix2021 said:

Yes, O4 means Octavia 4th generation.

To be exact, same as your's - 2021 Octavia 1.5 eTEC.

Original speakers are 15,5cm front and back. I have installed those 165mm Focals in the front without any issue - they fit perfectly, and are almost plug and play. Almost, as you have to replace plastic part of the woofer plug (contacts are the same, but speaker has 4 pin plug as Golf, and O4 has 2 pin plug).

Yes, to my ear difference is huge. For me it sounds very good now with EQ set to 0/flat.

Hi Felix how did you do the speaker electrical connection conversation on your Mk4 when installing the Focal VW Golf speakers?

Is there a readily available adapter plug I can purchase online?

Also did you install a Focal Amp too?

Has anyone done the upgrade with https://www.ars24.com/en/skoda-octavia-iv-loudspeaker-front-option?

I saw comments for their subwoofer for O4 on the German Skoda Community forum.

On 13/07/2025 at 19:28, Jez_VRS said:

Hi Felix how did you do the speaker electrical connection conversation on your Mk4 when installing the Focal VW Golf speakers?

Is there a readily available adapter plug I can purchase online?

Also did you install a Focal Amp too?

same here.. how did you manage?

Connected aomeone subwoofer to 52pin quadlock to front apeakers pins? I need info which pins on brown connector is for front speakers.

Looking into doing this as well - any update on the 2 pin vs 4 pin connector?

On 22/05/2026 at 10:46, MaxvdP said:

Looking into doing this as well - any update on the 2 pin vs 4 pin connector?

I did the upgrade a few days ago, and here is my update:

1. I installed Focal IS VW 165 (2 tweeters and 2 woofers) in the front. I also put some sound deadening inside the doors, as much as I could without dismounting window lift.

The sound has definitely improved. Where there was just mush instead of sound, now I can hear proper distinct sounds. Especially noticeable on lower volume.

2. I encountered the connector mismatch problem.

First, I tried to find proper adaptor and failed. Maybe there is such a thing, but I was unable to find something 100% compatible and ready to order.

Then I realized that the connector could be disassembled easily and plastic housing could be removed from the wires. I found VW plastic housing p/n is 1J0972704, which looks like the one that will fit both the metal connectors at the end of the wire and the speakers. I ordered it, and I'll find out later if it actually fits.

3. But, as I wanted to check new sound setup here and now, I was looking for immediate solution. To achieve this, I cut corners, literally. Metal female connectors of the Skoda wires fit speakers' male connectors perfectly. The only differences were in the plastic locking tabs and guides. So, I fine-tuned them with a knife, and got everything connected. Actually, I don't know if it's worth replacing plastic connector housing now…

4. To be honest, I still have one concern. Have I connected proper lines?

I had no resistance tester at the moment, but speaker itself has only two electrical contacts, and I assume that four outer metal pins are short-circuited in pairs. Therefore, I connected to couple of pins in the middle, red wire closer to the '+' sign, and it seems to work fine.

I would appreciate any advice on this matter.