Engine radiator Koyo or OEM Volkswagen

Koyo for top quality, mishimoto for normal quality. Both will do the job well

I just bought a Koyo, goes in tomorrow and appears to be great quality

Seems like a loose ground, my s13 did this when the grounds randomly came loose. That said my s13 cluster is so damn slow to react so I run an aftermarket gauge. I have a koyo rad which came with a slot for an aftermarket sensor.

Also i would hope it's not the case, however you mentioned this after an alternator change. I had a 96 civic with a turbo setup and I had an alternator with a failed voltage regulator, all of my aftermarket gauges and temp gauge was acting like this. I would check the volts from the alternator if this is the case, it also ballooned the hell out of my battery..

Koyo Radiator A2807. Great brand and very affordable.

My opinion koyo rad. But any with the heart symbol are favorites.

It’s got an actual Koyo radiator which is a good sign.

My only recommendation after testing several different radiators is to go with Koyo.

My '09 had the bad number, so I bought a Koyo radiator and spent an afternoon swapping it all. That was ~6-7 years ago.

Mine developed a small slow leak out of that nub two weeks after I bought it. Koyo gave me the run around on their warranty, insisting on photos of a destroyed radiator for replacement. I gave up. It’s a shame because it fit awesome and looked great.

Be careful with the early MK8s. Mine is a 2022 and boy howdy she's got issues. Shift knob broke, steering wheel capacitor issues that disable travel assist repeatedly, backup camera failure and others say they have issues with the radiator failing to be fully seated on its clips and causing big problems.