Parts for a brake overhaul for 2017 BMW 440i GC with M Sport brakes

cfm56d7b · 05-21-2021, 03:52 PM

I am planning a brake overhaul brake project for my 2017 BMW 440i GC with OEM M Sport brakes.

Parts planned:

- 2 x Zimmermann Coat Z Disc Brake Rotors / Front / Smooth
- 2 x Zimmermann Coat Z Disc Brake Rotors / Rear / Smooth
- 1 x OEM Brake Pads / Front
- 1 x OEM Brake Pads / Rear
- 1 x Brake Pad Wear Sensor / Front Left
- 1 x Brake Pad Wear Sensor / Rear Left

Anything else to add?

Logicoeur · 05-22-2021, 09:55 AM

Fluid. Stainless rotor screw if not already

435gc · 05-22-2021, 09:56 AM

Shouldn't need to replace the sensors unless they have been tripped.

aardate · 05-22-2021, 10:17 AM

Brake fluid?

cfm56d7b · 05-22-2021, 11:17 AM

Quote:

Originally Posted by aardate

Brake fluid?

Yes - will also change the brake fluid and replace OEM brake lines with stainless steel reinforced ones.

Daftasabrush · 05-22-2021, 12:40 PM

Zimmerman discs are single piece, if you care about weight and corrosion, you want the two piece discs like Textar.

The stock pads are a waste of time, go for Ferrodo DS2500s instead

cfm56d7b · 05-22-2021, 12:55 PM

Quote:

Originally Posted by Daftasabrush

Zimmerman discs are single piece, if you care about weight and corrosion, you want the two piece discs like Textar.

The stock pads are a waste of time, go for Ferrodo DS2500s instead

What do you like about Ferrodo brake pads?

Daftasabrush · 05-22-2021, 01:11 PM

Quote:

Originally Posted by cfm56d7b

Quote:

Originally Posted by Daftasabrush

Zimmerman discs are single piece, if you care about weight and corrosion, you want the two piece discs like Textar.

The stock pads are a waste of time, go for Ferrodo DS2500s instead

What do you like about Ferrodo brake pads?

The Ferrodos have way more initial bite and a higher coefficient of friction which remains pretty constant across normal operating temperatures meaning fade is perceptively non existent on the road.

Logicoeur · 05-22-2021, 01:35 PM

Quote:

Originally Posted by Daftasabrush

Quote:

Originally Posted by cfm56d7b

Quote:

Originally Posted by Daftasabrush

Zimmerman discs are single piece, if you care about weight and corrosion, you want the two piece discs like Textar.

The stock pads are a waste of time, go for Ferrodo DS2500s instead

What do you like about Ferrodo brake pads?

The Ferrodos have way more initial bite and a higher coefficient of friction which remains pretty constant across normal operating temperatures meaning fade is perceptively non existent on the road.

This. Mine have been great the last two months. I did a complete overhaul. Powdered and rebuilt calipers, lines, motul 5.1, Platz1 340mm 2 piece rotors in the front, 345 Brembos with r1 concepts rotors in rear. Car is sturdy in brakes now.

cfm56d7b · 05-22-2021, 01:56 PM

Quote:

Originally Posted by Daftasabrush

The Ferrodos have way more initial bite and a higher coefficient of friction which remains pretty constant across normal operating temperatures meaning fade is perceptively non existent on the road.

Interesting. So Ferrodos have a more aggressive initial bite than BMW OEM pads?

cfm56d7b · 05-22-2021, 02:00 PM

Quote:

Originally Posted by Logicoeur

This. Mine have been great the last two months. I did a complete overhaul. Powdered and rebuilt calipers, lines, motul 5.1, Platz1 340mm 2 piece rotors in the front, 345 Brembos with r1 concepts rotors in rear. Car is sturdy in brakes now.

I am changing my mind about Zimmermann smooth rotors. While inexpensive, I would like to find rotors which are lighter.

Recommendations for a 2 piece, floating rotor in M Sport brake size:

Front: 370x30mm
Rear: 345x24mm

435gc · 05-22-2021, 02:45 PM

Stoptech make some that are are nice, but pricey. EBC has some that are a bit cheaper. I think brembo has some too.

Logicoeur · 05-22-2021, 03:20 PM

Quote:

Originally Posted by cfm56d7b

Quote:

Originally Posted by Logicoeur

This. Mine have been great the last two months. I did a complete overhaul. Powdered and rebuilt calipers, lines, motul 5.1, Platz1 340mm 2 piece rotors in the front, 345 Brembos with r1 concepts rotors in rear. Car is sturdy in brakes now.

I am changing my mind about Zimmermann smooth rotors. While inexpensive, I would like to find rotors which are lighter.

Recommendations for a 2 piece, floating rotor in M Sport brake size:

Front: 370x30mm
Rear: 345x24mm

Like said below stoptech aero are abput 700 a rotor. Girodisc also makes some but again close to 2K.

Then there is Platz1 on eBay. They are Taiwanese, and the front set is about $700 shipped.
A bit cheaper than ECS/Turner 2 piece in the 8-900 range.

Haven't seen anyone make 2 piece for the rear. I believe there is just not enough space.

Daftasabrush · 05-22-2021, 03:26 PM

Yes I wasn't talking about two piece floating, more the composite ones like the factory discs where the hats are aluminium and the rotors are steel.

Daftasabrush · 05-22-2021, 03:41 PM

This is what I meant, most Zimmerman discs you see are single casting

https://www.otto-zimmermann.de/en/pr...-f-brake-disc/

cfm56d7b · 05-22-2021, 04:58 PM

Did anyone purchase EBC 2-Piece brake rotors? Any impressions to share?

https://www.buybrakes.com/bmw-440i-g...-coated-rotors

Daftasabrush · 05-22-2021, 05:38 PM

Quote:

Originally Posted by cfm56d7b

Did anyone purchase EBC 2-Piece brake rotors? Any impressions to share?

https://www.buybrakes.com/bmw-440i-g...-coated-rotors

I don't know what things are like in the US but that seems expensive. No doubt a good product but I bought these for £203 last year and the weight and specs matched the bmw discs. https://www.ebay.co.uk/itm/Genuine-O...-/192307413629

cfm56d7b · 05-22-2021, 05:41 PM

One more request - did anyone purchase rotors from Brakekinetic?

https://www.brakenetic.com/product/f...-bprs88668-14/

Tommi_Mav · 05-24-2021, 04:37 AM

Quote:

Originally Posted by Daftasabrush

This is what I meant, most Zimmerman discs you see are single casting

https://www.otto-zimmermann.de/en/pr...-f-brake-disc/

Zimmerman's Formula F line discs are two piece... It's also obvious in the pic you posted.

OP can consider Brembo two piece line also...
https://www.ebay.com/itm/35259329734...cAAOSwIz5cpaCv

which are almost same price with Zimmerman Formula F.

cfm56d7b · 05-24-2021, 01:15 PM

Quote:

Originally Posted by Tommi_Mav

Zimmerman's Formula F line discs are two piece... It's also obvious in the pic you posted.

OP can consider Brembo two piece line also...
https://www.ebay.com/itm/35259329734...cAAOSwIz5cpaCv

which are almost same price with Zimmerman Formula F.

Tommi_Mav, thanks for the recommendation. I am looking for smooth rotors since M Peformance style slotted / dimpled rotors tend to be noisy.

cfm56d7b · 05-24-2021, 01:16 PM

When do brake dust shields need to be changed?

Appreciate feedback.

Polo08816 · 05-24-2021, 02:20 PM

Is anyone going to have an application where the 1 piece will not be sufficient? It's fine even if you're tracking the car. The extra weight of the rotor versus savings is not significant.

05-21-2021, 03:52 PM	#1
cfm56d7b Lieutenant General 5886 Rep 10,256 Posts Drives: 2017 440i Gran Coupe & 2015 X5 Join Date: Nov 2012 Location: Orange County, CA iTrader: (2)	Parts for a brake overhaul for 2017 BMW 440i GC with M Sport brakes I am planning a brake overhaul brake project for my 2017 BMW 440i GC with OEM M Sport brakes. Parts planned: - 2 x Zimmermann Coat Z Disc Brake Rotors / Front / Smooth - 2 x Zimmermann Coat Z Disc Brake Rotors / Rear / Smooth - 1 x OEM Brake Pads / Front - 1 x OEM Brake Pads / Rear - 1 x Brake Pad Wear Sensor / Front Left - 1 x Brake Pad Wear Sensor / Rear Left Anything else to add?
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05-22-2021, 09:55 AM	#2
Logicoeur Lieutenant Colonel 993 Rep 1,934 Posts Drives: F30 335i xDrive Join Date: Feb 2018 Location: Boston iTrader: (0)	Fluid. Stainless rotor screw if not already __________________ F30 335iX \| Remus Axleback \| Fabspeed Catted DP \| VRSF Comp IC \| 18X9 ET35 19lb MT1 \| 255/40/18 ECS \| Ohlins RT Millway Street \| Millway Control Arm Bushings \| Turner Endlinks \| TMH 75mm 14x1.5 Studs \| BMW MPerf LSD \| XDelete \| Pipercross Filter \| MHD Stg2 93
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05-22-2021, 09:56 AM	#3
435gc Lieutenant 174 Rep 461 Posts Drives: 2015 435i Gran Coupe xdrive Join Date: May 2019 Location: Charlotte iTrader: (0)	Shouldn't need to replace the sensors unless they have been tripped.
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05-22-2021, 10:17 AM	#4
aardate First Lieutenant 194 Rep 343 Posts Drives: X4MC Join Date: Aug 2020 Location: Houston, TX iTrader: (0)	Brake fluid?
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05-22-2021, 12:40 PM	#6
Daftasabrush Fool 1857 Rep 3,542 Posts Drives: F31 340i Join Date: Jul 2014 Location: England iTrader: (0)	Zimmerman discs are single piece, if you care about weight and corrosion, you want the two piece discs like Textar. The stock pads are a waste of time, go for Ferrodo DS2500s instead __________________
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05-22-2021, 02:45 PM	#12
435gc Lieutenant 174 Rep 461 Posts Drives: 2015 435i Gran Coupe xdrive Join Date: May 2019 Location: Charlotte iTrader: (0)	Stoptech make some that are are nice, but pricey. EBC has some that are a bit cheaper. I think brembo has some too. Last edited by 435gc; 05-22-2021 at 02:58 PM..
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05-22-2021, 03:26 PM	#14
Daftasabrush Fool 1857 Rep 3,542 Posts Drives: F31 340i Join Date: Jul 2014 Location: England iTrader: (0)	Yes I wasn't talking about two piece floating, more the composite ones like the factory discs where the hats are aluminium and the rotors are steel. __________________
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05-22-2021, 03:41 PM	#15
Daftasabrush Fool 1857 Rep 3,542 Posts Drives: F31 340i Join Date: Jul 2014 Location: England iTrader: (0)	This is what I meant, most Zimmerman discs you see are single casting https://www.otto-zimmermann.de/en/pr...-f-brake-disc/ Attached Images __________________
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05-22-2021, 04:58 PM	#16
cfm56d7b Lieutenant General 5886 Rep 10,256 Posts Drives: 2017 440i Gran Coupe & 2015 X5 Join Date: Nov 2012 Location: Orange County, CA iTrader: (2)	Did anyone purchase EBC 2-Piece brake rotors? Any impressions to share? https://www.buybrakes.com/bmw-440i-g...-coated-rotors
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05-22-2021, 05:41 PM	#18
cfm56d7b Lieutenant General 5886 Rep 10,256 Posts Drives: 2017 440i Gran Coupe & 2015 X5 Join Date: Nov 2012 Location: Orange County, CA iTrader: (2)	One more request - did anyone purchase rotors from Brakekinetic? https://www.brakenetic.com/product/f...-bprs88668-14/
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05-24-2021, 01:16 PM	#21
cfm56d7b Lieutenant General 5886 Rep 10,256 Posts Drives: 2017 440i Gran Coupe & 2015 X5 Join Date: Nov 2012 Location: Orange County, CA iTrader: (2)	When do brake dust shields need to be changed? Appreciate feedback.
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05-24-2021, 02:20 PM	#22
Polo08816 Brigadier General 1610 Rep 3,947 Posts Drives: 2014 335i M Sport Join Date: Sep 2010 Location: MD iTrader: (0)	Is anyone going to have an application where the 1 piece will not be sufficient? It's fine even if you're tracking the car. The extra weight of the rotor versus savings is not significant.
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