Both UCB and Stanford retain ABET accreditation for mechanical engineering.
UCB also has an aerospace engineering major that is too new to be ABET accredited. You may want to ask directly if it is seeking ABET accreditation for that major, which cannot be granted until after the first students have graduated in the major. If it does become accredited, the accreditation will be retroactive to those students who attended while it was seeking ABET accreditation.