Acura TSX Engine Replacement in Phoenix

The first-generation TSX used the K24A2, a higher-compression K24 with a revised cylinder head and intake that made it the most desirable K24 variant in the swap market. That popularity is the defining feature of this vehicle’s engine situation.

If you own a TSX and need a replacement, you are competing with swap buyers for the same units, and you need to be careful that a "K24A2" you are quoted actually is one. If you are buying a K24A2 for a swap, the same verification applies in reverse.

The second-generation TSX used the K24Z3, and from 2010 offered a J35 V6. Those are different conversations again.

Competing with the swap market for your own engine

The K24A2 is the preferred base for K-series swaps because of its head, intake and compression ratio. That demand comes from builders with a budget for a project, and it sits on top of demand from TSX owners who simply need their car running again.

The practical effect is that prices are firmer than for other K24 variants and that misdescription is more common. An engine advertised as a K24A2 is worth verifying against the stamp. If your car is a first-generation TSX, that verification is worth insisting on.

Where Acura TSX orders go wrong

• The K24A2 commands a premium, which makes verification of the stamped code more important than usual.
• First and second generation TSXs use different K24 variants.
• The second-generation V6 option is a J35, not a K-series.
• A K24A2 fitted to something that is not a TSX is a swap and needs the ECU and immobiliser addressed.

None of this needs to be worked out on your own. The Engine Finder asks for the year, model and trim and does the identification from there. The engine code field is optional precisely because most people do not have it.