I've got some Accords and TSXs and TLs and am a stickler for using Honda/Acura parts instead of aftermarket. I've got some spare brake rotors from the cars which I'd like to get resurfaced and swap out. For the 03-07 and 08-12 Accord and 04-08 TL and TSX, there are three brake rotor part numbers for these cars: 45251-TA1-A01, 45251-TA5-A00, and 45251-TA6-A00. I'm trying to figure out what the difference between the TA1, TA5, and TA6 rotors is. They look dimensionally extremely similar and most aftermarket rotors interchange with all of these. Looking on HondaPartsNow/AcuraPartsWarehouse (since I don't have a real service information system), there is varying compatibility. Apparently some of the lower trim levels of the Accord are compatible with multiple of the TA1/TA5/TA6 rotors where the higher-end trims like EX and V6 and the Acuras are only compatible with one of the rotors.

Anyone know what the difference is? Think I can use the 45251-TA6-A00 rotor from an '11 Accord V6 on an '08 TSX that per AcuraPartsWarehouse takes the 45251-TA1-A01?

 

I see Chrisfrom1986 replied but then deleted his post, I guess because it was not correct. But he was on to something I think! What Chris said was that there's a difference in the center bore. Yes! But the info he had was not fully correct and also some details in my original post were wrong too.

I'm looking at these Brembo rotors on RockAuto just for reference:
Brembo 09793211: https://www.rockauto.com/en/moreinfo...t=1896&jsn=543
Brembo 09884011: https://www.rockauto.com/en/moreinfo...t=1896&jsn=546

Brembo 09793211 interchanges with 45251-TA0-AXX and 45251-TA5-A00 but not with TA1 and TA6. Brembo 09884011 on the other hand interchanges with 45251-TA1-AXX and 45251-TA6-A00 but not the TA0 and TA5. And it's obvious enough why looking at the specs on RockAuto. Not only is the center bore different but the rotor thickness and diameter are too. Okay! That explains why the TA5 works on the lower-end models. I wasn't even aware of the TA0 but I guess it's most similar to the TA5. Makes sense.

Okay so TA0/TA1 is a smaller rotor for a lower-end configuration of the car. I don't even own any of these since I only have Accord V6s and Acuras. But now what's the difference between TA1 and TA6?

 

As long as the rotor is 300mmx28mm and has the same centerbore as your hub it should be fine. I'm using a tl/tsx rotor because the accord rotor has a larger centerbore and it wouldn't work with the hub I was using.