We study Tauberian properties of regularizing transforms of vectorvalued tempered distributions, that is, transforms of the form M f ϕ (x, y) = (f * ϕ y )(x), where the kernel ϕ is a test function and ϕ y (·) = y −n ϕ(·/y). We investigate conditions which ensure that a distribution that a priori takes values in locally convex space actually takes values in a narrower Banach space. Our goal is to characterize spaces of Banach space valued tempered distributions in terms of so-called class estimates for the transform M f ϕ (x, y). Our results generalize and improve earlier Tauberian theorems of Drozhzhinov and Zav'yalov (Sb. Math. 194 (2003), 1599-1646. Special attention is paid to find the optimal class of kernels ϕ for which these Tauberian results hold.Dedicated to the memory of Vasiliȋ Sergeevich Vladimirov and Boris Ivanovich Zav'yalov 2010 Mathematics Subject Classification. 40E05, 46F05, 46F12.