Honda Accord Forum - Honda Accord Enthusiast Forums

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- Engine & Internal (https://www.hondaaccordforum.com/forum/engine-internal-11/)

- - F23A1 or F23A4 (https://www.hondaaccordforum.com/forum/engine-internal-11/f23a1-f23a4-19356/)

dstarnik

Jun 26, 2008 01:52 PM

F23A1 or F23A4

I'm trying to get O2 sensors for my Accord, but am not sure which engine I have.
What is the difference between an A1 and an A4?
As far as I can tell the A1 = VTECH and the A4 = ULTECH, but I'm not sure.

I called my local Honda dealer, and they don't even know.

dstarnik

Jun 26, 2008 01:54 PM

RE: F23A1 or F23A4

I just noticed the FAQ at the top of the forum list, and see that I was right about the VTECH thing.

falkore24

Jun 26, 2008 03:20 PM

RE: F23A1 or F23A4

yup .... it's a phone

http://affordablephones.net/fpdb/vtech-vt20-2431.jpg

JimBlake

Jun 26, 2008 04:13 PM

RE: F23A1 or F23A4

Look at the logo on thevalve cover.

VTEC = F23A1

ULEV VTEC = F23A4

vtech= plug it into the phone line...

ieetgluu

Sep 16, 2008 06:27 PM

RE: F23A1 or F23A4

I'd be more inclined to plug the phone line into it... just sayin. hah. hah.

00AccordLX5spd

Sep 17, 2008 10:48 AM

RE: F23A1 or F23A4

As has been said, look directly at the top of your engine.

If it says VTEC, it is an F23A1
If it says ULEV VTEC, it's an F23A4

If you want to be 100% certain, you could look for the stamp on the engine. It is to the left of the exhaust manifold beneath a radiator hose. Easy to see

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