I imagine you are using a rebuilt. Real bad idea unless it is a MB, Denso, or maybe Behr. In the condition you have it you are obviously not using one of those three.
You may get away with it, as the rest are probably only 25% defective immediately. Not likely to stay sealed in another 25% in the first year.... still 50-50 not too bad odds.
But you really don't want to down size a Nippondenso as they are weaklings anyway. The 10p15c only does good on a 190, it is mediocre in a 300 and in a 126 car it will be lacking.
Bosch Master, ASE Master, L1
33 years MB technician