Febi Bilstein 1.4 Bar Expansion Tank Pressure Cap for Select 1987 - 1993 318i, 318i, 325e, 325i and 525i Models, 17 13 7 639 023. Premium Febi Bilstein 1.4 bar expansion tank pressure cap. This will fir select models of the 1987 thru 1993 E30 3 series and E34 525i.
