Acura RDX Engine Replacement in Phoenix
The RDX is one of the few vehicles in this catalogue that spans three entirely different engine families.
The Acura RDX is one of the few vehicles in this catalogue that spans three entirely different engine families across its production run, which makes the generation the single most important piece of information when sourcing a replacement. The first-generation RDX (2007-2012) used the K23A1, a 2.3-litre turbocharged four-cylinder. The second-generation (2013-2018) switched to the J35Z5 V6. The third-generation (2019-2022) moved again to the K20C4, a 2.0-litre turbocharged four-cylinder.
Those are three fundamentally different engines in three consecutive generations. A buyer who says "RDX engine" without specifying the year is asking a question that has three different answers, none of which are interchangeable with the others.
The first-generation K23 is turbocharged and intercooled, with supporting hardware that is specific to that application. It is also the rarest of the three engines in the used market, which affects both availability and price. The second-generation J35 is the most straightforward to source because of shared family lineage with the Pilot and Odyssey, though the variant still needs confirming.
Three engines, three conversations
A buyer who says "RDX engine" without specifying the year is asking a question that has three different answers. The first-generation K23 turbo is a different engine from the K24 used in other Hondas, the second-generation J35 is a V6 shared with the Pilot, and the third-generation K20C4 is a direct-injection turbo unrelated to either.
The first-generation K23 is the rarest of the three in the used market, which affects both availability and price. The second-generation J35 is the most straightforward to source because of shared family lineage with the Pilot and Odyssey, though the variant still needs confirming.
What to have ready when you request a RDX engine
The model year is the most important piece of information on an RDX engine request. It determines which of the three engine families you need, and those three, the K23 turbo, the J35 V6 and the K20C4 turbo, are entirely different engines with no parts in common.
Supplying the VIN along with the model year gives a supplier everything needed to identify the exact engine variant, drivetrain configuration and turbo status. Without the year, any quote has assumed one of three different engines, and the assumption may be wrong. The first-generation K23 is less commonly available in the salvage market, which affects lead time and price, so the year matters for availability as well as identification.
Acura RDX engines by generation
Three generations, each with a different engine family.
| Generation | Years | Trim | Engine |
|---|---|---|---|
| First generation | 2007–2012 | All trims | K23A1Turbocharged. |
| Second generation | 2013–2018 | All trims | J35Z5 |
| Third generation | 2019–2022 | All trims | K20C4Turbocharged direct injection. |
Where Acura RDX orders go wrong
- Three different engine families across three generations; the generation is not optional information.
- The first-generation K23 turbo is a different engine from the K24 used in other Hondas, with different supporting hardware.
- The third-generation K20C4 is a direct-injection turbo, not interchangeable with earlier RDX engines or other K-series.
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.
Check availability for your Acura RDX
Year, trim and ZIP is enough to start. If you have the VIN it removes the guesswork entirely.
Common questions
Does my RDX have the K23 or the J35?
If it is a 2007-2012 model, it has the K23A1 turbocharged four-cylinder. If it is a 2013-2018 model, it has the J35 V6. If it is a 2019 or later, it has the K20C4 turbo. These are three different engines and are not interchangeable. Confirm the year and the stamped code on the block.
Why did Acura switch engines for the RDX?
Market and emissions requirements drove the changes. The first-generation K23 turbo was a relatively uncommon choice in the compact luxury SUV segment. The second-generation moved to the proven J35 V6 for broader appeal and simpler emissions compliance. The third-generation returned to a turbocharged four-cylinder for fuel economy and performance, but a different, more modern turbo engine than the original K23.
Related pages
- K24 EngineThe 2.4 K-series from the Accord, CR-V, Element and TSX.
- J35 EngineThe 3.5 Honda V6 from the Odyssey, Pilot and Ridgeline.
- Acura TLXDirect-injection K24 four-cylinder or J35 V6, with the fuel system differing between them.
- Honda CR-VEvery modern CR-V is a K24, but which K24 changes by generation.
- Acura EnginesAcura engine families and the Honda blocks they share.
- Repair or Replace Your EngineWhether to spend anything at all, before deciding what to spend it on.
Find the right engine for your vehicle
Tell us the year, model and trim. We identify the engine your vehicle takes and come back with current availability and pricing.
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