F23A1 or F23A4

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Jun 26, 2008 | 01:52 PM

dstarnik

Unregistered

Posts: n/a

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.

Jun 26, 2008 | 01:54 PM

dstarnik

Unregistered

Posts: n/a

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.

Jun 26, 2008 | 03:20 PM

falkore24

Been Around A Long Time Member

Joined: Aug 2007

Posts: 6,213

From: Wayne, NJ

RE: F23A1 or F23A4

yup .... it's a phone

Jun 26, 2008 | 04:13 PM

JimBlake

Super Moderator

Joined: May 2006

Posts: 18,398

From: Wisconsin

RE: F23A1 or F23A4

Look at the logo on thevalve cover.

VTEC = F23A1

ULEV VTEC = F23A4

vtech= plug it into the phone line...

Sep 16, 2008 | 06:27 PM

ieetgluu

Joined: Feb 2008

Posts: 67

From: Lakes Region, NH

RE: F23A1 or F23A4

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

Sep 17, 2008 | 10:48 AM

00AccordLX5spd

Registered User

Joined: Jan 2007

Posts: 4,322

From: Brandon, MS

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