The hydraulic pump of your bmw z4 a pricey part that is key for the operation of your cabriolet roof system is located in an area that is not waterproof.
Fix z4 roof.
The roof motor container sadly has quite a design floor it is susceptible to back filling with water over time due to the main roof drains not being able to take the water away.
In this video we diagnose and fix a bmw z4 with a malfunctioning convertible roof.
Cayman autos specialise in bmw z3 and bmw z4 roof repairs at cayman autos we have a high level of customer service and turnaround for quick efficient and cost effective bmw roof repairs.
It has an 8 eight hour dis assemble order and at 75 100 plus per hour in repair cost you are looking at over 1000 dollars just to get to the power motor.
How to replace soft top motor without removing roof.
When a pump becomes water damaged it requires replacement.
All this information is in the owners manual but if you haven t got this to hand this video will help you release use the roof manually.
There is another issue that causes this motor to fail and here is what a z4 owner can do to prevent future problems.
The power roof motor is on the driver s side of the z4 below the roof.
What s more if you do not have your rear drains cleared regularly don t expect a new pump to last too long.
Here are some nice instructions with pictures.