Hello. I own a Toyota Yaris 1, 2003, 1.4 diesel, Japanese version. I want to mount a new radio. I have a few questions. - can I mount a new radio, so that the old one does not dump? (does not necessarily work) - what I need to buy to connect a new radio (some dice, new panel or something else) -...

1. You can mount a new radio. 2. You need an ISO connector for the Toyota, preferably when you take out the radio and see what kind of plug-in you have and then you will find the one on the Allegro. 3. Speakers can be replaced of course if current ones do not suit you. Here is one of the radio installation options

Can you tell me which speakers are good? I do not know completely, and I would not want to buy cheap.

At the beginning, stop the replacement of speakers, connect a new radio and listen to it, then you will make a decision.

the speakers at the factory radio in the middle of the volume scale are already grating, so I suspect that the new one will be similar. I would like to do it at one time and have it off my head

You have a fellow radio exchange: 1-- see what power or how much Watt has a new radio 2-- see how much Watt have your current in the car: you can find out from the catalog's manual of Toyota if there is, - or unscrew the loudspeakers and check their markings on the magnet 3 - now if the parameters agree, for example, radio eg 4 X 60 Watt, and when checking your speakers you will find that they also have 60 Watt you can leave them, - it will depend only on you what effect you need 4 - my suggestion, if you have a cassette, I recommend the radio I own this and do not complain 4 X 45Watt - loudspeakers - I am playing, I would even give 80 W here but I could not get another spacing and I mounted such ------ from my side is advice if you have questions, shoot ...

Hello gentlemen, I have a problem I have toyote yaris 1 from 2005 1.0 and I can't find the iso cable for the radio I ordered but it is a few mm too small. Maybe someone knows what to order? And now the question is important up or down the radio?

Patrycze97 Add some clearer photos

I can do it tomorrow maybe because I'm on the road ... And so the radio connects to the main radio on top or the one which is the cassette because I still see iso but on such small cubes ... even with a plug down and I don't get it now this: // and not the first time I see that there were balls in the stupid radio haha

Because it's not the cube. The power and front speakers are blue and the back speakers are smaller. This large cube is from the display on top.

Toyota Yaris 1 (2003, 1.4 Diesel, Japanese): New Radio Installation, Costs, Speaker Replacement

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#1 17174045 18 Apr 2018 04:29

burzyk1992 burzyk1992

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Post #1
17174045 18 Apr 2018 04:29

Hello. I own a Toyota Yaris 1, 2003, 1.4 diesel, Japanese version. I want to mount a new radio. I have a few questions.
- can I mount a new radio, so that the old one does not dump? (does not necessarily work)
- what I need to buy to connect a new radio (some dice, new panel or something else)
- it pays to replace the speakers on the front of the board and those in the door? Is it better to buy some new ones (eg to the rear regiment), or maybe both options?
- how much it can cost such an exchange with a specialist
- if I have to exchange loudspeakers, you can recommend them
Thank you for your help and best regards
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#2 17174258 18 Apr 2018 09:36

MietekFighter MietekFighter

Level 20

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Post #2
17174258 18 Apr 2018 09:36

1. You can mount a new radio.
2. You need an ISO connector for the Toyota, preferably when you take out the radio and see what kind of plug-in you have and then you will find the one on the Allegro.
3. Speakers can be replaced of course if current ones do not suit you.

Here is one of the radio installation options
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#3 17174819 18 Apr 2018 15:16

burzyk1992 burzyk1992

Level 6

» | Topic author Helpful post? (+3)

Post #3
17174819 18 Apr 2018 15:16

Can you tell me which speakers are good?
I do not know completely, and I would not want to buy cheap.
#4 17175395 18 Apr 2018 20:20

milejow milejow

Company Account
Level 43

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Post #4
17175395 18 Apr 2018 20:20

At the beginning, stop the replacement of speakers, connect a new radio and listen to it, then you will make a decision.

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#5 17175407 18 Apr 2018 20:23

burzyk1992 burzyk1992

Level 6

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Post #5
17175407 18 Apr 2018 20:23

the speakers at the factory radio in the middle of the volume scale are already grating, so I suspect that the new one will be similar. I would like to do it at one time and have it off my head
#6 17175593 18 Apr 2018 21:24

LWD11 LWD11

Level 31

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Post #6
17175593 18 Apr 2018 21:24

burzyk1992 wrote:
the speakers at the factory radio in the middle of the volume scale are already grating, so I suspect that the new one will be similar. I would like to do it at one time and have it off my head

This factory radio has a weak amplifier, at a certain volume the sound is not clean. Current radios have amplifiers much stronger which translates into better sound. As a rule, the listening session is done after the radio is exchanged, then the decision about replacing the speakers.
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#7 17184320 23 Apr 2018 19:56

Tomekck88 Tomekck88

Level 9

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Post #7
17184320 23 Apr 2018 19:56

You have a fellow radio exchange:
1-- see what power or how much Watt has a new radio
2-- see how much Watt have your current in the car: you can find out from the catalog's manual of Toyota if there is,
- or unscrew the loudspeakers and check their markings on the magnet
3 - now if the parameters agree, for example, radio eg 4 X 60 Watt, and when checking your speakers you will find that they also have 60 Watt you can leave them,
- it will depend only on you what effect you need
4 - my suggestion, if you have a cassette, I recommend the radio https://www.morele.net/radio-samochodowe-lg-lcs310ur-438304/ I own this and do not complain 4 X 45Watt
- loudspeakers http://www.audiopioneer.pl/peiying-py-1310c-i...lossing-with-with-60w-i-2-lata-gwarancji.html
- I am playing, I would even give 80 W here but I could not get another spacing and I mounted such
------ from my side is advice if you have questions, shoot ...
#8 18792485 30 Jun 2020 23:19

Patrycze97 Patrycze97

Level 6

» | Helpful post? (0)

Post #8
18792485 30 Jun 2020 23:19

Hello gentlemen, I have a problem I have toyote yaris 1 from 2005 1.0 and I can't find the iso cable for the radio I ordered but it is a few mm too small.
Maybe someone knows what to order?
And now the question is important up or down the radio?
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#9 18792610 01 Jul 2020 01:06

Tomekck88 Tomekck88

Level 9

» | Helpful post? (+1)

Post #9
18792610 01 Jul 2020 01:06

Patrycze97
Add some clearer photos
#10 18792754 01 Jul 2020 08:47

Patrycze97 Patrycze97

Level 6

» | Helpful post? (0)

Post #10
18792754 01 Jul 2020 08:47

I can do it tomorrow maybe because I'm on the road ... And so the radio connects to the main radio on top or the one which is the cassette because I still see iso but on such small cubes ... even with a plug down and I don't get it now this: // and not the first time I see that there were balls in the stupid radio haha
#11 18792903 01 Jul 2020 10:19

SZYMON BYDGOSZCZ SZYMON BYDGOSZCZ

Level 38

» | Helpful post? (0)

Post #11
18792903 01 Jul 2020 10:19

Patrycze97 wrote:
I can't find the iso cable for the radio I ordered but it is a few mm too small

Because it's not the cube.

The power and front speakers are blue and the back speakers are smaller.

This large cube is from the display on top.
#12 18793100 01 Jul 2020 12:11

Patrycze97 Patrycze97

Level 6

» | Helpful post? (+2)

Post #12
18793100 01 Jul 2020 12:11

I ordered something
#13 18793176 01 Jul 2020 12:55

SZYMON BYDGOSZCZ SZYMON BYDGOSZCZ

Level 38

» | Helpful post? (+2)

Post #13
18793176 01 Jul 2020 12:55

Patrycze97 wrote:
I ordered something

This is it.

Added after 54 [seconds]:

Patrycze97 wrote:
And now the question is important up or down the radio?

Down is the radio.

The top is an on-board computer and a radio display.
#14 18793655 01 Jul 2020 18:13

Patrycze97 Patrycze97

Level 6

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Post #14
18793655 01 Jul 2020 18:13

Thank you very much the audio is boasting how everything will be ok; p
#15 18796064 02 Jul 2020 21:43

Patrycze97 Patrycze97

Level 6

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Post #15
18796064 02 Jul 2020 21:43

It is only on Saturday to connect the amplifier wiring and it will roar ^^
#16 20403412 24 Jan 2023 20:24

jacentykasi jacentykasi

Level 2

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Post #16
20403412 24 Jan 2023 20:24

Hello,
and a lot of unscrewing to get to these cubes from the original radio? My wife doesn't let me live anymore, she says that pounding the lower right corner doesn't help anymore (the radio probably has cold February).
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Topic summary

✨ The discussion revolves around the installation of a new radio in a 2003 Toyota Yaris 1 (1.4 Diesel, Japanese version). Users confirm that a new radio can be installed without affecting the old one. An ISO connector is necessary for the installation, and it is recommended to check the existing plug type. The conversation also touches on speaker replacement, with suggestions to first test the new radio before deciding on speaker upgrades. Users note that factory radios often have weak amplifiers, and replacing them can improve sound quality. Recommendations for specific radio models and speakers are provided, emphasizing the importance of matching power ratings between the new radio and existing speakers.

FAQ

TL;DR: Expect 4×45–60 W head units for Yaris 1 installs—"I own this and do not complain 4 X 45Watt." Match radio power to your speakers and check markings before replacement. [Elektroda, Tomekck88, post #17184320]

Why it matters: For Toyota Yaris 1 (2003–2005) owners, this FAQ shows how to pick adapters, keep the top display, and plan upgrades.

Quick Facts

Radio location: lower unit is the radio; upper module is the on‑board computer/display. [Elektroda, SZYMON BYDGOSZCZ, post #18793176]
Connector layout: blue plug = power + front speakers; smaller plug = rear speakers; large plug = upper display. [Elektroda, SZYMON BYDGOSZCZ, post #18792903]
Power matching: aftermarket units often list 4×45–60 W peak; check speaker wattage on the magnet. [Elektroda, Tomekck88, post #17184320]
Sound quality: factory amp is weak; newer head units play cleaner at higher volume. [Elektroda, LWD11, post #17175593]
Adapter tip: pull the radio, confirm plug type, then buy a matching Toyota‑to‑ISO harness. [Elektroda, MietekFighter, post #17174258]

Can I install a new radio in a 2003 Toyota Yaris 1 and keep the upper display?

Yes. The Yaris 1 uses a two‑piece setup. The lower unit is the radio. The upper module is the on‑board computer and display. Install the new head unit in the lower slot. The upper display remains in place and continues its functions. [Elektroda, SZYMON BYDGOSZCZ, post #18793176]

Which harness/adapter do I need to connect an aftermarket head unit?

Use a Toyota‑to‑ISO harness that matches your car’s plug. Pull the lower radio, confirm connector shape, then order accordingly. Sellers like Allegro list options once you know the plug type. This avoids returns and wiring mistakes. [Elektroda, MietekFighter, post #17174258]

Where do the Yaris radio connectors go, and which plug powers what?

The blue plug carries power and front speakers. A smaller plug carries the rear speakers. The large multi‑pin plug is for the upper display, not the new radio. Using the display plug causes compatibility issues or no power. [Elektroda, SZYMON BYDGOSZCZ, post #18792903]

Up or down—where do I mount the new radio?

Mount it down. The lower unit space is the radio bay. The upper module serves as the dash computer and display. [Elektroda, SZYMON BYDGOSZCZ, post #18793176]

My ISO cable is a few millimeters too small—what did I do wrong?

You likely matched it to the wrong plug. The big upper plug is for the display. Order the adapter that fits the blue radio plug instead. That resolves the size mismatch and powers the unit. [Elektroda, SZYMON BYDGOSZCZ, post #18792903]

Should I replace factory speakers immediately, or try the new radio first?

Start with the head unit swap. The factory radio amplifier is weak. A modern unit often cleans up the sound. "Current radios have amplifiers much stronger which translates into better sound." Decide on speakers after listening. [Elektroda, LWD11, post #17175593]

Why do my stock speakers grate at mid volume?

The stock head unit distorts as volume rises because its amplifier lacks headroom. A stronger aftermarket radio reduces clipping at the same level. Many owners report better clarity after the swap alone. [Elektroda, LWD11, post #17175593]

What power ratings should I match between radio and speakers?

Check the head unit spec, often 4×45–60 W peak. Check each speaker’s magnet for wattage. If the numbers align, you can keep them. Some aim for 80 W speakers, but verify mounting spacing before purchase. [Elektroda, Tomekck88, post #17184320]

How much does a professional radio swap cost?

Prices vary by shop and parts list. Install time depends on whether you need only a harness or extra parts. Confirm the plug type before booking to avoid add‑on charges. Ask for itemized quotes covering harness and labor. [Elektroda, MietekFighter, post #17174258]

How do I hook up a new radio—what are the basic steps?

Remove the lower radio and inspect the factory connector shape.
Buy a Toyota‑to‑ISO adapter that matches that plug.
Connect adapter to the new head unit, test audio, and refit. [Elektroda, MietekFighter, post #17174258]

Will the upper display still show radio info after I swap the lower unit?

The upper module remains functional as the car’s computer and display. Your aftermarket radio uses its own display in the lower slot. The upper module does not replace the new unit’s screen. [Elektroda, SZYMON BYDGOSZCZ, post #18793176]

How do I reach the “cubes” (plugs)? Is there a lot of unscrewing?

Access the plugs by removing the lower radio assembly. The connectors sit on the back of that lower unit. Once out, you can verify the blue and smaller plugs. [Elektroda, SZYMON BYDGOSZCZ, post #18793176]

Tapping the lower right corner used to help; now it doesn’t—what’s likely wrong?

Intermittent audio that responds to tapping suggests cold solder joints in the factory radio. Repair or replace the unit. If replacing, use the lower slot and correct harness. [Elektroda, jacentykasi, post #20403412]

Any budget‑friendly radio and speaker examples members used?

An owner used an LG LCS310UR rated 4×45 W and Peiying PY‑1310C components. He advised checking wattage and mounting spacing. These worked acceptably for him. [Elektroda, Tomekck88, post #17184320]