No sound, a loud bang, or random crackling in the speakers? If your car has an AMP-80 series amplifier, whether it is AMP-80SLE (e.g. 963703W300, 963703U700, 963703Z101) or AMP-80RPE (96370A4100, 963703Z150), we prepared this post just for you.
We repair various AMP amplifier versions from the same “family”, factory-fitted in Kia (Carens, Sportage, Sorento) and Hyundai (i40, ix35, Veloster). In practice, the symptoms, causes of failure and costs are almost the same.
Treat this post as a universal cheat sheet. You will learn what most often fails due to moisture under the seat or surges after “jump-starting with a booster”, why the refurbishment cost of 1476 zł incl. VAT remains fixed and how to arrange safe shipping.
How do you check whether your amplifier is the AMP-80 series?
Before you move on to the causes and solutions, it is worth making sure we are talking about the same unit.
Identification issues are common. Customers enter different manufacturer names in forms, while the key information is on the label. Check in three steps whether this description applies exactly to your module.
1. Visual method – compare the casing design.
Take a look at the photos in this article. The amplifier we are writing about has a distinctive metal casing, which acts as a heatsink, i.e. a component that dissipates heat, and three main connector sockets on the front.
If your unit looks the same or very similar, that is already the first good sign.
2. Part numbers – the most reliable way to identify it
The most reliable method is to check the rating label on the amplifier casing. You will find the model designation and part number on it. It is worth looking for the following symbols:
- AMP-80SLE (96370-3W300, 96370-3U700, 963703Z101)
- AMP-80RPE (96370-A4100, 963703Z150)
3. Car model – where were these amplifiers fitted?
AMP-80 amplifiers were fitted as standard in many popular models from the sibling Kia and Hyundai brands. In practice, they are most often found in:
- Kia: Sportage, Sorento, Carens.
- Hyundai: i40, ix35, Veloster.
If you own one of these cars and have a sound problem, it is worth considering damage to this very component. In other words, the fault is very often caused by a defective AMP-80 series amplifier.
“The radio works, but there’s no sound” – How do you know it is definitely the amplifier’s fault?
Based on the enquiries we receive, we have put together a list of typical symptoms. It is worth noting that they almost always point to damage to the factory amplifier in your Kia or Hyundai. A good approach is to compare them with your own case and see whether any of these scenarios sound familiar.
- Complete loss of sound. This is by far the most commonly reported problem. Customers write, for example: “No sound, no voice” or “sound in the speakers doesn’t work, the radio powers up, the navigation works”. What is characteristic is that the rest of the system appears to be working — “all buttons and knobs work, it connects to the phone via BT […] but there is no sound from any speaker”. Importantly, in some cases you can hear system sounds, for example from navigation, but audio from media is completely absent.
- Flat battery. This is the second very worrying symptom, often appearing together with silence from the speakers. As one customer wrote, “with the amplifier connected, the battery goes flat”. This shows that the damaged amplifier draws power even after the ignition is switched off. In other words, it does not go into sleep mode, which can simply immobilise the vehicle.
- Blowing fuses. Customers also report that “the amplifier blows the fuse when connected”. This is a clear sign of a serious internal short circuit in the sound amplifier, i.e. the module responsible for amplifying the audio signal.
- Concerning noises: bangs, crackles or beeps. Before complete silence sets in, the amplifier can signal a problem in a very unpleasant way. You describe “a loud bang like a cannon pop” when switching off the ignition, or “crackling in the speakers even with the radio off”. It also happens that the sound appears irregularly. Then “you can hear beeping and it does not respond or responds with a delay to volume changes”.
- Sound disappearing after a while. This is simply one variation of the no-sound problem. As one customer describes it: “before the complete fault, the radio played for 2 minutes, didn’t play for 10, until after two days the sound disappeared completely”.
If any of the above symptoms occur in your car, you can be almost certain that the culprit is the faulty factory AMP-80 series amplifier.
Moisture and voltage surges from a booster pack – the two main causes of AMP-80 amplifier faults
From our experience, there are usually two scenarios behind problems with factory Kia and Hyundai amplifiers. It is worth noting that the symptoms — silence, crackling or bangs — can be very similar. In practice, however, the causes almost always come down to these two typical reasons.
- Moisture under the seat or in the boot. Customers often describe that after heavy rain or after washing the car, the mat under the passenger seat is wet, and the sound disappears straight away. Water can also get in through a leaking sunroof, scuttle seal, sound-deadening foam or the boot. Even a single drop can cause corrosion, i.e. gradual damage to the metal and connections, and in effect damage the connections on the amplifier’s main board.
- Voltage surges after emergency starting with a booster pack. A weak battery and using a poor-quality booster pack is a recipe for damaging delicate electronics. This also applies to the sound amplifier.
If the speakers have gone silent straight after heavy rain or after a “rescue” jump start from a booster pack, the AMP-80 amplifier is almost certainly to blame. The key point is that, with timely refurbishment, it can be successfully saved, rebuilt and protected against the problem returning.
Refurbish the amplifier or buy a used one?
When faced with the decision of what to do next with the faulty amplifier in your Kia or Hyundai, many drivers check the prices of used units on auction sites. That is understandable. However, it is worth considering that when you look into it more closely, the “apparent saving” can quickly turn into a much bigger expense and extra headaches.
| Option | Cost | Written warranty | Risk of repeat failure | Origin |
|---|---|---|---|---|
| “Working from an auction” | 800-2000 zł | 14 days | high — the damage can be hidden (moisture, water ingress) | Unknown / donor car from dismantling – usually a private seller or scrapyard. |
| New from an authorised dealer | approx. 4200 zł | 12 months | low, but 3× more expensive | Stock (Kia/Hyundai) – brand new module from the official dealer network. |
| Refurbishment at OEMatic | 1476 zł | 12 months | ≈ 0 % (new components, circuits, board protected with a coating) | Your original amplifier – removed from your car, fully restored and tested. |
Why does refurbishment win? The reason is simple: you keep your own original module instead of buying an unverified part from dismantling. It is worth noting that the refurbishment rules for the AMP-80SLE / AMP-80RPE amplifier are clear and fixed: 1476 zł incl. VAT, 12 months’ warranty, and the service itself takes 1–5 days. No extra charges “after diagnosis”. All damaged components are replaced, and the board is protected with a coating, which means the likelihood of the fault returning drops to zero. You also keep the car fully original, because after the repair the factory part number remains. In practice, the audio system works exactly as the manufacturer intended.
There is only one condition: the amplifier must not have been opened before or after attempted repairs. We also accept such cases, but we quote the refurbishment cost individually at the assessment stage, i.e. within 1–2 days of receipt.
