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Front window Bosch Icon wiper blades – 20A vs 20B size

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Old Nov 28, 2016 | 03:08 PM
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Front window Bosch Icon wiper blades – 20A vs 20B size

I'm looking for new wiper blades – I noticed that Bosch is offering 20A and 20B (driver/passenger) versions of their Icon blades. The 20B passenger size is supposedly angled differently for a better wipe.

TireRack indicates 20A + 20B for the FD3S but the Bosch website only shows the 20A for the RX-7 application. I think the TireRack system is probably wrong – I'm definitely overthinking this.

Opinions?
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Old Nov 28, 2016 | 03:44 PM
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I had bad luck with the Bosch Icon wiper blades on my FC.

Because of their shape I couldn't get them to stay down over 150mph, so I went back to stock Mazda wipers.

IDK if FD has this same problem because I just went for new stock Mazda wipers when I replaced the FDs.
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Old Nov 28, 2016 | 03:54 PM
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The Bosch Evolutions on my FD haven't given me any problems. I don't remember any unusual movement when I was driving on the track last time.

The FD windshield is pretty curvy. I think I got 2 x 20A last time.
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Old Nov 28, 2016 | 04:08 PM
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Originally Posted by BLUE TII

Because of their shape I couldn't get them to stay down over 150mph, so I went back to stock Mazda wipers.
Are you really driving 150 mph in the rain??
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Old Nov 28, 2016 | 04:26 PM
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Nope.
Also, I wouldn't care if the wipers wouldn't stay down/off in the rain.

What would happen is that with the wipers off, the wiper arms would slowly slide across the windshield to vertical on the windshield as speeds increased.
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Old Nov 28, 2016 | 04:46 PM
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Yeah, mine used to lift a little bit in the FC as well. They didn't creep up the windshield, but they'd lift off of the glass a little bit and rattle. I don't remember it happening in the 3rd gen.
lol, maybe because the FC was constantly taking a beating and still tickin', whereas the FD is on it's 3rd motor and I hardly ever go to the track anymore.

I'm talking about the cheapest Bosch blades I could find at OReilly's.
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Old Nov 30, 2016 | 01:51 PM
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I use to work for Bosch Automotive Aftermarket (Wiperblades), so if you have any questions just PM me.
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Old Nov 30, 2016 | 07:15 PM
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Thanks for the offer. I'm pretty sure 20A for both driver and passenger sides will work – they're working fine for me with the Evolutions.
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Old Nov 30, 2016 | 08:06 PM
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From: https://www2.mazda.com/en/100th/
look it up! Vehicle Search - bosch.com
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Old Nov 30, 2016 | 08:17 PM
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It indicates Bosch order number 3 397 013 254 for driver and passenger side, so I conclude that 20A for both is fine.

P.S. They call the 13B-REW an "Otto" engine. How literal.

Last edited by HiWire; Nov 30, 2016 at 08:19 PM.
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