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      05-22-2019, 09:45 PM   #1
misguided_will
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M Sport Blue caliper versions..370mm vs 340mm rotor?

Hi there

I know the blue M Sport brakes on the 335i/435i/340i/440i have F 370mm/ R 340mm rotors.

The other Blues on 135i/140i/235i/240i/328i/330i are F 340mm/R 345mm

A wrecker is selling a CALIPER set which he says are from a 435.

QN: how will i know if the fronts calipers are infact for the 370mm and not the 340mm rotors? is there an OBVIOUS way to tell? I've not seen the difference versions side by side.

Thank you!!
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      05-22-2019, 09:54 PM   #2
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I think it’s stamped on the caliper
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      05-22-2019, 10:14 PM   #3
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Quote:
Originally Posted by misguided_will View Post
Hi there

I know the blue M Sport brakes on the 335i/435i/340i/440i have F 370mm/ R 340mm rotors.

The other Blues on 135i/140i/235i/240i/328i/330i are F 340mm/R 345mm

A wrecker is selling a CALIPER set which he says are from a 435.

QN: how will i know if the fronts calipers are infact for the 370mm and not the 340mm rotors? is there an OBVIOUS way to tell? I've not seen the difference versions side by side.

Thank you!!
You posted this question 2 days ago. And it was answered. Why ask again?
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      05-22-2019, 11:45 PM   #4
misguided_will
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eh sorry didn't see your reply hence reposted.

can anyone 100% confirm the stamping though? no refund of change of mind on the purchase hence tapping into the knowledge of members here.

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Originally Posted by Logicoeur View Post
You posted this question 2 days ago. And it was answered. Why ask again?
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      05-23-2019, 12:01 AM   #5
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Yeah....I don't believe that.

Anyway, again, It's stamped on the back of the Blue/Red/Yellow/Orange four piston Brembo.

Ask the seller to confirm what the stamping says, on the back of the item, they are trying to sell you. Or for the part number. If that's something they won't, or can't do, I suggest you not purchase it from that seller.

They aren't scarce on the market.
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      05-23-2019, 08:10 AM   #6
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As stated caliper will have cast/raised lettering on rear of caliper housing

Either '340' or '370/380'

Ask for pics of rear of calipers specifically of the cast in lettering. If they won't give it to you - buy them somewhere else...

In the pic below you can just make out the stamping I'm talking about directly above the yellow round sticker - in that case it says 370/380

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Last edited by 1QuikWS6; 05-23-2019 at 04:47 PM..
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      05-23-2019, 04:42 PM   #7
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Perfect!

This is exactly what I needed. Thanks so much!!!

Quote:
Originally Posted by 1QuikWS6 View Post
As stated caliper will have cast/raised lettering on rear of caliper housing

Either '340' or '370/340'

Ask for pics of rear of calipers specifically of the cast in lettering. If they won't give it to you - buy them somewhere else...

In the pic below you can just make out the stamping I'm talking about directly above the yellow round sticker - in that case it says 370/340

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