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Old 03-06-2018, 12:57 PM   #1
thesunnyboi
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Default 2018 Sti headlights plug and play for 2015 Sti?

Does anyone know if the 2018 Sti stock headlights can be directly plug and play into a 2015 Sti? Thanks!
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Old 03-06-2018, 02:17 PM   #2
.akai
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The lights will work, the responsive steering will not.
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Old 03-06-2018, 03:23 PM   #3
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Quote:
Originally Posted by .akai View Post
The lights will work, the responsive steering will not.
Do you have a source for this? I've been researching this too and I thought the main connector was different. 2015-2017 LED did plug in to a base wrx with no auto-leveling functionality. Duhh, he said sti.....
but using that, 2015-2017 wrx AND sti used the same headlight plug. 2018 limited wrx and sti, I've only read that they have a different plug.

Last edited by amiexploited; 03-08-2018 at 07:23 PM. Reason: added more words
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Old 03-08-2018, 12:38 AM   #4
thesunnyboi
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I donít mind the responsive steering but more so the factory C light DRL is what I am looking for. I have a brand new set of Subispeed sequential headlights Iím selling or possibly trading for 2018 headlights plus cash if it works
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Old 03-08-2018, 06:33 PM   #5
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I believe that the Halogens are 12 pin where as the new 18+ headlights are 16pin. Lack of 4 pins could explain the missing steering response.
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Old 01-07-2019, 11:00 PM   #6
Prabh
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So has anyone confirmed this to be working?
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Old 01-08-2019, 02:04 PM   #7
depe
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Interested in this as well. I just picked up a 2015 sti limited.
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Old 01-15-2019, 10:51 AM   #8
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It works, I have a friend who's done it. I'm currently working on sourcing the connector for the 12 pin/old style headlights. I've determined the correct connector for the 16 pin. Once I have that worked out I'll sell the adapter harnesses. Only think that will not work is SRH as that is driven by a new/revised BIU.
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Old 01-15-2019, 11:03 AM   #9
amiexploited
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Quote:
Originally Posted by free_refil View Post
It works, I have a friend who's done it. I'm currently working on sourcing the connector for the 12 pin/old style headlights. I've determined the correct connector for the 16 pin. Once I have that worked out I'll sell the adapter harnesses. Only think that will not work is SRH as that is driven by a new/revised BIU.
Nice! Been wanting to hack an adapter if I ever got a set of 18+ headlights. I wonder if the 18+ impreza/crosstrek limited headlights use the same connector. Id want to do the led swap on my premium crosstrek.
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Old 01-23-2019, 09:49 PM   #10
c1em3ntchua
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There's a harness available on Japanparts. Not cheap though.

https://www.japanparts.com/parts/detail/55050
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Old 01-29-2019, 01:10 PM   #11
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Quote:
Originally Posted by free_refil View Post
It works, I have a friend who's done it. I'm currently working on sourcing the connector for the 12 pin/old style headlights. I've determined the correct connector for the 16 pin. Once I have that worked out I'll sell the adapter harnesses. Only think that will not work is SRH as that is driven by a new/revised BIU.
so i just bought some headlights online not knowing that they were for a 2018 limited( the Japanese translator suck) anyways i was wondering when you are going to be selling the harness bc i am definitely interested. i also dont want to pay over 200 from the link above for a harness.
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Old 10-01-2019, 11:40 AM   #12
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Quote:
Originally Posted by bassheadactivate View Post
so i just bought some headlights online not knowing that they were for a 2018 limited( the Japanese translator suck) anyways i was wondering when you are going to be selling the harness bc i am definitely interested. i also dont want to pay over 200 from the link above for a harness.
I still cannot find a source for the 12 pin plugs. The only source I can find is buying damaged 15-17 headlamps and removing the plug from them. I do know what the connector is for the 18+ 16 pin plugs. I could make them with 6" wire pigtails which you could solder or tap into the 12-pin plug harness wiring. PM me if you're interested in this.
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Old 10-01-2019, 05:40 PM   #13
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Quote:
Originally Posted by free_refil View Post
It works, I have a friend who's done it. I'm currently working on sourcing the connector for the 12 pin/old style headlights. I've determined the correct connector for the 16 pin. Once I have that worked out I'll sell the adapter harnesses. Only think that will not work is SRH as that is driven by a new/revised BIU.
Do you think that the BIU is a model year thing or a trim level thing? I'd love to get the SRH headlights in my wife's 19 WRX, assuming the SRH wires are farther up the harness somewhere.
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Old 10-03-2019, 10:59 AM   #14
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Quote:
Originally Posted by grafton View Post
Do you think that the BIU is a model year thing or a trim level thing? I'd love to get the SRH headlights in my wife's 19 WRX, assuming the SRH wires are farther up the harness somewhere.
Alright, so here's the research I've done. On the 18+'s, there are two additional wires for SRH on the wiring harness for the headlamps. These go to the Auto Headlight Beam Leveler CM (Control Module), which is above the fuse box on the drivers side next to the steering wheel column. Pin 14 on the 18+ headlight plug goes to Pin 7 on B150, the plug that goes into the CM. Pin 15 goes to Pin 9 on B150.

On the 15's, these two wires are not present or pinned out on this connector, from what I can tell in the service manual. I've found that the '17 CM is PN 84051VA110. The 18+ CM is PN 84051VA170. The modules are ~$150 from what I've seen online. I am yet to research what type of connector is on the CM, so that I could possible source additional pins to add Pin 7 & 9 to the harness, and run to the headlamps.

Shining Speed in Japan has a harness that does this. The full harness with the newer CM is ~$440 on their site. They mention that in order to not have error lights and get get SRH functioning, you have to swap the CM and have the dealer recalibrate the system. However, I've found the correct procedure for doing the calibration in the '18 Service Manual, and I don't believe that a special computer is required to perform the procedure as they mention. I could be wrong though. The procedure in the manual says this is what you do if you replace any part of the headlight system, including the CM.

Here's the info for the pinouts. I'm not sure if they are 100% correct as I have not yet performed this swap:

18+ LED Pinout:
1=Halogen high beam +12v
2=Ground (high beam)
3=Lo Beam +12
4=Headlight Leveler System Ground
5=Headlight Leveler Signal (To CM B150 #16 for LH, #5 for RH)
6=Side Marker/Clearance Light +12
7=+12v DRL C-Light
8=Turn Signal
9=Side Marker/Clearance Light Ground
10=Headlight Leveler Signal (To CM B150 #10)
11=Headlight Leveler Signal (To CM B150 #17)
12=Headlight Leveler Signal (To CM B150 #11)
13=SRH Swivel Actuator +12 (To CM B150 #1)
14=SRH Inputs (To CM B150 #7)
15=SRH Inputs (To CM B150 #9)
16=?

15 LED Pinout:
1=High Beam +12
2=Side Marker/Clearance Light Ground
3=BLANK
4=C-Light +12/Side Marker/Clearance Light?
5=High Beam Ground
6=Auto Headlight Beam Leveler (To CM B150 #16 for LH, #5 for RH)
7=Lo Beam Ground
8=Lo Beam +12
9=BLANK
10=Auto Headlight Beam Leveler (To CM B150 #17)
11=Auto Headlight Beam Leveler (To CM B150 #11)
12=Auto Headlight Beam Leveler (To CM B150 #10)

As I mentioned earlier, I cannot find the 12-pin connector from the 15 year models. If ANYBODY can source a store to purchase this connector at a decent price, I would GLADLY PAY A FINDERS FEE OF $100!!! This would allow me to build these harnesses for MUCH cheaper than $440 from some company Japan!
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Old 04-14-2020, 03:03 AM   #15
spacemonkeySTI
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sorry for reviving this thread, but wondering if there is an update on this? I have a 2015 wrx sti with subispeed v1 lights and looking to go back to oem. Having the SRH from 18+ models would be a nice thing to have and a guy with a 2019 sti is willing to trade with me, but just want to make sure the lights will work in my car. SRH doesn't need to function right now, but will be nice if this harness becomes available in the future.
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Old 04-14-2020, 03:30 AM   #16
spacemonkeySTI
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Quote:
Originally Posted by free_refil View Post
It works, I have a friend who's done it. I'm currently working on sourcing the connector for the 12 pin/old style headlights. I've determined the correct connector for the 16 pin. Once I have that worked out I'll sell the adapter harnesses. Only think that will not work is SRH as that is driven by a new/revised BIU.

how does this work considering my harness is 12pin and the headlight is 16pin? does it just fit with the bottom exposed?? I know that I don't have the SRH feature yet (till you make the harness haha)
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Old 06-06-2020, 12:20 AM   #17
baethief
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Bump. Any update? I have a 2017 STI and am looking to get 2018+ headlights. Iím not electrically inclined. Iím just wondering if I can plug the 2018 headlights into my car without buying a new harness, iím not worried about the SRH
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Old 06-07-2020, 09:59 PM   #18
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Quote:
Originally Posted by spacemonkeySTI View Post
sorry for reviving this thread, but wondering if there is an update on this? I have a 2015 wrx sti with subispeed v1 lights and looking to go back to oem. Having the SRH from 18+ models would be a nice thing to have and a guy with a 2019 sti is willing to trade with me, but just want to make sure the lights will work in my car. SRH doesn't need to function right now, but will be nice if this harness becomes available in the future.
i have a set of oem 15 STi headlights i just pulled off if anyones interested. Were in the process of doing the 18 STi front end on a 15 STi. So far i have ordered the front bumper, headlights and full headlight harness.
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Old 10-01-2020, 04:43 PM   #19
robertmccall
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Quote:
Originally Posted by free_refil View Post
Alright, so here's the research I've done. On the 18+'s, there are two additional wires for SRH on the wiring harness for the headlamps. These go to the Auto Headlight Beam Leveler CM (Control Module), which is above the fuse box on the drivers side next to the steering wheel column. Pin 14 on the 18+ headlight plug goes to Pin 7 on B150, the plug that goes into the CM. Pin 15 goes to Pin 9 on B150.

On the 15's, these two wires are not present or pinned out on this connector, from what I can tell in the service manual. I've found that the '17 CM is PN 84051VA110. The 18+ CM is PN 84051VA170. The modules are ~$150 from what I've seen online. I am yet to research what type of connector is on the CM, so that I could possible source additional pins to add Pin 7 & 9 to the harness, and run to the headlamps.

Shining Speed in Japan has a harness that does this. The full harness with the newer CM is ~$440 on their site. They mention that in order to not have error lights and get get SRH functioning, you have to swap the CM and have the dealer recalibrate the system. However, I've found the correct procedure for doing the calibration in the '18 Service Manual, and I don't believe that a special computer is required to perform the procedure as they mention. I could be wrong though. The procedure in the manual says this is what you do if you replace any part of the headlight system, including the CM.

Here's the info for the pinouts. I'm not sure if they are 100% correct as I have not yet performed this swap:

18+ LED Pinout:
1=Halogen high beam +12v
2=Ground (high beam)
3=Lo Beam +12
4=Headlight Leveler System Ground
5=Headlight Leveler Signal (To CM B150 #16 for LH, #5 for RH)
6=Side Marker/Clearance Light +12
7=+12v DRL C-Light
8=Turn Signal
9=Side Marker/Clearance Light Ground
10=Headlight Leveler Signal (To CM B150 #10)
11=Headlight Leveler Signal (To CM B150 #17)
12=Headlight Leveler Signal (To CM B150 #11)
13=SRH Swivel Actuator +12 (To CM B150 #1)
14=SRH Inputs (To CM B150 #7)
15=SRH Inputs (To CM B150 #9)
16=?

15 LED Pinout:
1=High Beam +12
2=Side Marker/Clearance Light Ground
3=BLANK
4=C-Light +12/Side Marker/Clearance Light?
5=High Beam Ground
6=Auto Headlight Beam Leveler (To CM B150 #16 for LH, #5 for RH)
7=Lo Beam Ground
8=Lo Beam +12
9=BLANK
10=Auto Headlight Beam Leveler (To CM B150 #17)
11=Auto Headlight Beam Leveler (To CM B150 #11)
12=Auto Headlight Beam Leveler (To CM B150 #10)

As I mentioned earlier, I cannot find the 12-pin connector from the 15 year models. If ANYBODY can source a store to purchase this connector at a decent price, I would GLADLY PAY A FINDERS FEE OF $100!!! This would allow me to build these harnesses for MUCH cheaper than $440 from some company Japan!
Is this the 12pin harness youíre looking for? https://parts.subaru.com/p/Subaru_2020_WRX-20L-6MT-Base/Headlight-Wiring-Harness/60018454/84981VA070.html?fbclid=IwAR2gCSmxFtNnlNZZwZjY-y58PdvaxiwcaalNWnVVZvDZgnvO-_APh15siss
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Old 10-01-2020, 04:51 PM   #20
Subbiespeed
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Quote:
Originally Posted by robertmccall View Post
Is this the 12pin harness youíre looking for? https://parts.subaru.com/p/Subaru_2020_WRX-20L-6MT-Base/Headlight-Wiring-Harness/60018454/84981VA070.html?fbclid=IwAR2gCSmxFtNnlNZZwZjY-y58PdvaxiwcaalNWnVVZvDZgnvO-_APh15siss
That's the harness that is on the back of the headlight, he needs the harness that starts at the fuse box and goes to the headlights. 4 differences between the 2 headlight harnesses. I've already swapped that harness from a 18 sti to a 15 sti and used the 18 headlights as well as the turn signal functioning. The only thing that doesn't work is the headlights turning with the steering wheel direction. Only way thatll work is if you replace the dash harness as well
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Old 10-01-2020, 06:14 PM   #21
amiexploited
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Quote:
Originally Posted by Subbiespeed View Post
That's the harness that is on the back of the headlight, he needs the harness that starts at the fuse box and goes to the headlights. 4 differences between the 2 headlight harnesses. I've already swapped that harness from a 18 sti to a 15 sti and used the 18 headlights as well as the turn signal functioning. The only thing that doesn't work is the headlights turning with the steering wheel direction. Only way thatll work is if you replace the dash harness as well
sounds like a great project. Did you have a write up for that? I figured the steering responsive retrofit was out of the question.
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Old 10-01-2020, 10:36 PM   #22
robertmccall
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How do you convert the 16pin limited SRH harness connections to the 12pin base/premium connection? I want to run premium headlights without SRH but not sure what is need to swap the 16pin connection for the 12pin connection.
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Old 10-05-2020, 10:05 PM   #23
Rukus Loves Subies
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Quote:
Originally Posted by robertmccall View Post
How do you convert the 16pin limited SRH harness connections to the 12pin base/premium connection? I want to run premium headlights without SRH but not sure what is need to swap the 16pin connection for the 12pin connection.
You need this:
https://www.subispeed.com/part/a-700...i#.X3vQqvcpDqu

I actually just installed 2019 headlights into my 2016 STI
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Old 03-08-2021, 04:02 AM   #24
Malik53
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Default Do the Adaptive or turning system work??

Quote:
Originally Posted by Rukus Loves Subies View Post
You need this:
https://www.subispeed.com/part/a-700...i#.X3vQqvcpDqu

I actually just installed 2019 headlights into my 2016 STI
that's cool!!

Do the Adaptive or turning system work?? how was your experience ?
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Old 05-01-2021, 09:43 PM   #25
whitie7291
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Hey can I get some info from you!
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