Extra ports on your new radiator? It may still be the right part.
You open the box, compare the new radiator with the old one, and spot two connections your car never had. Your first thought is understandable: “They sent me the wrong radiator.”
Maybe—but those extra ports alone do not prove it. Here is the detail I would check before sending it back.
One radiator can cover more than one setup
Some replacement radiators are cataloged for multiple engine and transmission combinations. They may include a built-in transmission oil cooler even when a particular approved application does not use it.
MAHLE explains that, on a radiator approved for both automatic and manual applications, the internal oil cooler and its connections can remain unused on the manual version. So your original radiator can lack those connections while the correct replacement includes them.
The two fluids have separate passages
The transmission oil cooler is a separate heat exchanger inside the radiator tank. In an intact unit, transmission fluid and engine coolant do not mix. The cooler exchanges heat with the coolant through its walls.
That is why an unused oil-cooler connection is not automatically a coolant leak. But do not apply that explanation to every opening on a radiator: a coolant port, drain or sensor opening is a different matter.
What I would check before calling it the wrong part
The exact application: year, model, engine, transmission, and the manufacturer's catalog notes for that part number.
The physical match: mounting points, hose locations, fan/shroud attachments, and any specified adapters.
The extra connections: confirm they really are oil-cooler ports and that your vehicle does not use them.
The instructions in the box: follow the manufacturer’s directions for unused ports, plugs and supplied fittings.
Plug requirements can vary. For example, one Spectra Premium technical notice specifies different supplied plugs according to transmission type and vehicle equipment. That is a part-specific instruction—not a rule to apply to every radiator.
Before you return it, let us check
Send us the new part number, your vehicle details or VIN, and clear photos of both radiators and the connections you are concerned about. We can review the application with you before you install it or start a return.
I would rather help you settle that question first than have you lose time shipping back a part that may be correct. And if the application does not match, we need to know that too.
The takeaway: extra transmission-cooler ports can be normal on a radiator approved for several configurations. They do not, by themselves, prove that it is the wrong part—or guarantee that it fits yours.
Ask Johann to check your radiator · Find a part for your vehicle
Manufacturer references
MAHLE: Unused radiator connections, Technical Messenger 07/2021
Spectra Premium: radiator plug selection, technical notice RIS52
Nissens: how engine and transmission oil coolers work
