In Reply to: Strut terminology posted by Otto on April 26, 2000 at 10:23:52:
The strut housing is the tubular member with a spring perch and a stub axle. The strut insert is the actual damper that --inserts-- into the strut housing and has the long machined shaft that mounts to the strut bushing at the vehicle body.
Your receipt says they replaced the strut insert, and this is what is leaking. If its still under warranty, they should replace it.
'72 BMW 2002tii
'94 LR Defender 90
'83 Mercedes 300SD (274k on the clock)