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I ended up fitting a 02-05 hyundai Getz wiper motor to my 81. the bolts all lined up and the wiper arm fitted the spline perfectly I did have to pack the motor as it is smaller so didn't rest against the cradle correctly and I spliced the connector off the Porsche motor to the hyundai wiring tail. It is only two speed but where I live it doesn't rain that much so two speeds and intermittent like every other car I have ever owned is just fine. I went down this road as I found one of these motors for $30 of eBay and second hand Porsche delivered was over $150
... "In my experience a new wiper motor can last around 15 to 20 years. The main bearing then gets noisy or seizes. A non-refurbished secondhand one may last 2 to 10 years, depending on the age of the car it came from. So a non-refurbished used replacement is not an ideal replacement"...Jonathan
Jonathan's rationale was that used was a poor choice (agree its a possible issue depending on sourcing) and he wanted new/refurbished even if an alternate part. But you have an indeterminately used Hyundai part. I understand this may have been the cheapest route for you - but I am rather confident a used Bosch motor would have better long term reliability all other things being equal.
I see a good condition (looking) Bosch from 928Intl @ $122 shipped to me in AZ. I'd do that unless cost was my only consideration - so then I'd have a very reasonable expectation of not needing to touch it ever again.
In my experience a new wiper motor can last around 15 to 20 years.
Really? Id bet the median lifetime of these units per model year in the 928 has to be damned near 98% of vehicle age..not sure how else to say that Id bet most 78s have a functional motor in them still.
I am with speedtoys My experience is that wiper motors rarely fail and I will add usually because of some mischief - and given I had just got the car who knows why it failed or even if the fault is still there and will burn out this motor in shout order.. I though the question was what motor fits without altering or filing parts of the car away. I have provided a solution that doesn't not require any permanent alterations, and is readily available. These cars have superb engineering but the quality of the parts provided by third parties is not that flash look at the alternator and the wiring harness.. People are happy to fit volvo hvac resistor block and any other combination of 3rd party manufactures for NLA parts. Why not a chineese/korean made wiper motor- good chance a modern bosch unit is made in china anyway.
I believe he was really only talking about the stock Bosch 928 part, he might have different or indeterminate thoughts on a used Hyundai motor...? so his answer may be actually more supportive of what I said. However if it works well for your needs then that is a good outcome - it's your car.
Some 928 owners will indeed fit anything that works regardless of source, some are more choosey about where they will use alternatives - and some stick with stock parts whatever the cost. I'd say probably most are quite choosey on this. But it's also fair to say at least some of the 928's stock parts are not very good at all! However for me, as Speedtoys alludes to: stock wiper motors have passed the tests of time in the excellent category overall.
Hi T J Brom, thanks for replying to my original query with your suggestion and experience. I have also been advised that Vauxhall Astra Mk4 wiper motors fit right hand drive 928s. These are available as brand new aftermarket replacements for £20 - about 25 USD!
I obtained one of the aftermarket wiper motors for an Astra Mk4 and it fits perfectly. 2 speed only of course. So these wiper motors are good as a permanent replacement or a temporary replacement while refurbishing an original wiper motor. If anyone wants wiring info for using one of these on a 928 please contact me with an email.
New aftermarket Wiper Motor for Astra Mk4
Last edited by Jonathan R; 07-21-2023 at 07:41 AM.
Really? Id bet the median lifetime of these units per model year in the 928 has to be damned near 98% of vehicle age..not sure how else to say that Id bet most 78s have a functional motor in them still.
In warm climates that may be right, unless the bearing grease dries up. In wet and damp climates I doubt your figure is anywhere near accurate.
In warm climates that may be right, unless the bearing grease dries up. In wet and damp climates I doubt your figure is anywhere near accurate.
I've been on this forum for >20 years and more than 5 before that on the email list - there just haven't been very many posts about wiper motors dying of old age or abuse. Many posts about intermittent wiping issues and parking issues - virtually all related directly to the intermittent relay. This covers a wide swath of usage in all climates - so they seem to be rather reliable IMO esp. given that even the newest 928s are now closing in on 30 years old.
However - its good that you found something that suits your needs at a very keen price. Is the mechanical fitment a direct drop in? or does it require some adaptation as with the other alternative motor mentioned earlier.
Hi Alan, not sure why you keep going on about how few people have issues with wiper motors. If this thread helps just a few people it is still worthwhile. The readily available aftermarket wiper motor I described is a direct drop-in. No modification required other than the wiring connector.
Hi Alan, not sure why you keep going on about how few people have issues with wiper motors.
I actually told you several times - I've been around here a long time paying attention. I would replace a failed motor with a good condition used Bosch 3 speed 928 motor in this situation, because they are reliable and have full function - that is still my advice - unless cost is the Only consideration. There are Porsche stock parts that are not good or reliable - where an alternative is better or as good and cheaper - this isn't one of them.
Please allow for the fact that others may hold a different view or preference to your own. There is at least one person on this list who has already replaced his wiper motor with an alternative modern one rather than a used original one, and others who have emailed me privately for info about the new alternative wiper motor. There are also no doubt plenty of 928 owners who refer to rennlist for solutions to 928 problems without ever posting those problems to rennlist.
Although I'm not a total purist myself, I do prefer to maintain original functionality where possible, and for the 3-speed wiper functionality I have now completed refurbishing my own 928 GT's wiper motor and refitted it.
I say what I say for the benefit of all owners, I'm not telling them what to do - merely giving my advice. They have already read your opinion on it and they have read mine too - now they get to choose based on the discussion for pros & cons. It does seem you too do value originality/full functionality in fixing & reinstalling the stock motor which is interesting. I can tell you that in Arizona although it rarely rains - when it does it often rains quite prodigiously - and wiper speed 2 is not sufficient to see the road clearly. Performance cars needs performance wipers too.
People can chose to do whatever they want with their cars - if they understand all the tradeoffs they'll make decisions they are less likely to regret.
07-06-2023, 02:32 PM
