poor road condition decrease tie rods life significantly
i know a guy he drives only in highways and never changed a tie rod. his car still has the original ones from the factory with + 200k
my tie rods get 20k to 40k and also i drive in poor roads
but for a 5k i think something is wrong maybe you bought a cheap tie rod
one time a bought a cheap aftermarket tie rod and it lasted for 3 months
or maybe you re a crazy driver who drives with full speed in potholes

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1991 190D 2.5 515K