moin also…. i drive a ’97 toyota corolla 1.4l petroler and he has in the standgas and with undertouring gas giving son siren, rattle, rattle….I heard that are the hydrozünsel…….?!! and now my questions…. 1. are these really the hydrozünsel if yes what do they do at all and can you replace the then cost-effective notfals itself ?!?! 2. if not what is it then and how can you replace it cheaply or at least eliminate the noises the good car has now I don’t want to invest a lot of money anymore, but otherwise I’m quite satisfied … I changed the achskopf cuffs for the first time at 175tkm and otherwise I didn’t get too much….. about other experiences which could be broken the next time I wouldn’t be disappointed……… thx in advance….