Ive own both Mk6 1.8T Jetta and now have a Mk5 2.5L Jetta and both have required new radiators at 150k miles. they have not been leaking coolant since.
Super happy with my koyorad. I bought the manual version and kept my trans cooler from when I bypassed the stock one.
I've had a koyorad in mine for almost 4 years now, zero issues. Granted I've got a manual so the only thing running through mine is coolant.
I ordered the Nissen Radiator from Rock Auto for around $70 including shipping and ill go from there im planning on fixing it this weekend so ill keep updating
installed a koyo radiator. Very beautiful fitment
I've been running a Mishimoto in the racecar for 3 years now with 0 issues and their lifetime warranty including damage during use is hard to beat.
Car came with a mishimoto radiator with the shroud and fans. The car handles Texas heat pretty well during autox events.
With that taken care of reliability concerns would be pretty minimal and the core itself should be an improvement. I even confirmed with Mishimoto, in writing, that modifying the quick connects would NOT void my lifetime warranty with them.
Stay away from Mishi. That is certified garbage juice.
i've never really heard good things about mishimoto's fitment and for 500 bucks you could find better mods to do.
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