Folks,
Not sure if this is new information, but thought I’d share what I found regarding the hydraulic pump motor for the convertible top. I had water in the trunk, which caused the A6A3 error (dead hydraulic temp sensor in the motor) and I assumed I needed to replace the motor.
Used hydraulic units and rebuilding all sounded a bit much and I didn’t think that the motor for the BMW would be unique to the Z4. So I looked around on eBay and found that the motor looked awefully similar to the ones on the hydraulic top units on other cars, like the 2010-17 Audi A5/S5 convertibles, down to the electrical connector.
So I bought a 2010 Audi A5 hydraulic unit for $160 shipped on eBay to test my theory. It arrived yesterday. Took the motor off the Audi unit and it’s identical! I swapped it in about 5min with the broken one on my hydraulic unit and it works perfectly. Top moves smoothly and no errors.
So, if you need a new motor for the hydraulic top unit, this will work for under $200.
Hope this helps someone.
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Audi A5 top hydraulic unit motor fits Z4
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Audi A5 top hydraulic unit motor fits Z4
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Audi A5 top hydraulic unit motor fits Z4
Probably used on many vehicles, just knowing what variation fits what.
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Audi A5 top hydraulic unit motor fits Z4
Did Robbi not comment on this before and he says the pumps are different?
E89 2014 35i M Sport Black with Black leather
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Audi A5 top hydraulic unit motor fits Z4
Great information, thanks for sharing.
'07 Z4M Interlagos Blue. All options except extended leather.
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Audi A5 top hydraulic unit motor fits Z4
That's a great find, assuming it continues to last you as well as it has so far. Top stuff.
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Audi A5 top hydraulic unit motor fits Z4
It's much cheaper to
Most A5 pumps offered on eBay & Co. have massive traces of corrosion! Be very carefully, as there is no reason to sell a perfect working pump by a private seller.
- renew the 2 salmon relays next to the pump on a regular base
- avoid water around the hydraulic pump => "HowTo Maintenance thread"
- just replace the NTC temp. sensor. It costs about 0.50€ plus shipping
Most A5 pumps offered on eBay & Co. have massive traces of corrosion! Be very carefully, as there is no reason to sell a perfect working pump by a private seller.
Pardon, je suis Allemand
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