I also have a question on code 17843 secondary air inject...

Hello, my name is \*\*\*\*\* \*\*\*\*\* I will be helping you with your question today. I've been working on Audis for over 30 years now, so I should be able to help you through this. Please understand that some of my suggestions may require special diagnostic tools and equipment that many home mechanics may not have, but are often required. So, my first question is whether you're planning on performing your own repairs, or are you wanting to be armed with information before bringing it into your mechanic? **Also, the site automatically prompts for a phone call. It's very rare that I'm available by phone, so let's hold off on that for now. If needed after we exchange some information, I will do my best to take the time for the call.** Couple of questions here: 1) can I get a VIN? 2) do you own and are familiar with using a DVOM(multimeter)? 3) are you comfortable with reading wiring diagrams? 4) what exact relay did you replace? Any chance you can take a picture of it and attach it here?

I plan on doing it myself

Ok, got that so far

1) \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* 2)and yeah sort of 3) not really maybe if I can see it4#

I replaced the white relay which was the secondary air injection relay and replaced it with a similar one which is the black one

Which exact relay in which panel? Ok, got that also. Thanks. Few moments please

I replayed it from The panel that’s on the corner of the engine bayyeah take your time

Actually, I was hoping for the location in the car itself. I want to make sure you replaced the correct relay.

There box of relays located by the engine and it’s the corner of the bay

Which corner? This is pretty important

The left corner the side of driver

And the SAI relay in on the passenger side, hence the detailed info requests

Detailed info

Relay number is \*\*\*\*\* in position 3 on the passenger side. Best to undo what you did on the driver's side, and replace relay in position 3 on the passenger side with Audi part number 4H0 951 253 A That white relay on the driver's side is the fuel pump relay And yes, that one has the same pin configuration

Can I help finding the 373 relay for the secondary air injection relay? or what’s the part number for it

I posted the exact part number and location. Relay panel on right side, position 3, part number 4H0 951 253A

Do I paste that part number on the web or how? When I did I got different number relays 373 didn’t show up

373 is printed right on the relay itself. And you can buy that part number right from the dealer. They're about $35

Is it the one

yeah might get it from dealer but just wondering if that one i sent is the correct one

That part number doesn't cross in my information, and I'm connected right to the Audi parts server. Just get that part number I posted from the dealer so that you know it's correct. There is a lot of aftermarket junk on Ebay

How can I search it online what site do I go to find from the Audi dealer

Just type in the part number, or call your local dealer and buy it. Here is an online source that I use: [https://www.ecstuning.com/b-genuine-volkswagen-audi-parts/multipurpose-relay-priced-each/4h0951253a~oev/](https://www.ecstuning.com/b-genuine-volkswagen-audi-parts/multipurpose-relay-priced-each/4h0951253a~oev/)

I found this one?

If click on it you can maybe see more info

That looks to be the correct part number, yes.

is it located on the right side corner of the engine bay

The best I can do is offer location and part replacement information. I cannot verify whether certain online sellers are offering genuine parts. Hopefully this has helped, and yes it's in the exact location that I mentioned previously.