M Sport Brakes - G20, G22
 
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M Sport Brakes - G20, G22

Revised 09/03/2021
This page is evolving as we continue to find exceptions and changes made in the middle of production.


The brake options on the G20 3-series and G22 4-series are much less confusing than their predecessors but there is still some confusion that needs clearing up. Luckily, it seems internet forums have already caught on to the differences and we included links to them below.

There are five factory brake options offered on G20 3-series and G22 4-series: 30i standard, 30i M Sport, M40i standard, Motorsport Engineering, and M Performance.


330i/430i Standard Brakes

Base model brakes with single-piston sliding calipers front and rear.
Front Rotor: 330x24mm, 1-piece, blank face rotors
Rear Rotor: 330x20mm, 1-piece, blank face rotors



330i/430i M Sport Brakes

If the M Sport package was selected at the time of ordering the brakes were upgraded to M340i/M440i specs. See below.



M340i/M440i Standard Brakes (M Sport)

As a full M Sport model the M340i and M440i received appropriate M Sport brake upgrades. These are Brembo 4-piston fixed calipers in the front and single-piston sliding calipers in the rear. These were offered in either blue or red color.
Front Rotor: 348x36mm, 2-piece, blank face rotors
Rear Rotor: 345x24mm, 2-piece, blank face rotors



M340i/M440i Motorsport Engineering/Track Package Option

In the BMW parts diagrams there is a listing for the "Motorsport Engineering" optional brakes. It's option code 033 (aka S033T or 033T or ZTK). We think this is a rare option and may not be offered in all markets. It was not offered for 330i/430i. The rotor size was increased to 374mm and the fixed caliper was changed for the extra 26mm of rotor diameter. Although the calipers look almost identical - and share some of the same components - they are slightly different. The pads are also different with the larger brakes getting a larger pad. The rear caliper remained a sliding single-piston design. These calipers were also offered as blue or red color. 19" wheels are required.
Front Rotor: 374x36mm, 2-piece, blank face rotors
Rear Rotor: 345x24mm, 2-piece, blank face rotors



M Performance Accessory Brakes (all models)

Available from the Accessories catalog, the M Performance brakes are a dealer-installed option. These match the specs of the Motorsport Engineering brakes but were only offered in the red color. 19" wheels are required.
Front Rotor: 374x36mm, 2-piece, dimpled & slotted rotors
Rear Rotor: 345x24mm, 2-piece, dimpled & slotted rotors



How To Tell
You can't tell which brakes you have by the color. Just because you have red calipers does not mean you have an upgraded brake kit.
You can't tell which brakes you have by the caliper - they are extremely similar in appearance.
The best way we have found so far is to measure from the exact middle of your wheel center cap to the outer edge of your brake rotor. Over 7 inches is the 374mm rotor; under 7 inches is the 348mm rotor.
If you have 18" wheels you definitely do not have the larger brakes.


Checking size on G20/G22 brakes. Click for larger.




Rotor Size
Base 330i/430i rotors are 330mm in diameter and 24mm thick.
Base M340i/M440i rotors are 348mm in diameter and 36mm thick. These are also the same rotors used for the 330i/430i M Sport package.
M Performance (MP) and Motorsport Engineering (ME) use the same size 374mm diameter and 36mm thickness. MP rotors have a dimpled & slotted pattern on the face but ME rotors are blank. Because of the size, 19" wheels were required.



Caliper Color
In the past the color of the caliper was a strong telltale sign of which brakes you had. But no longer.
Standard 330i/430i calipers are silver-grey.
M Sport brakes were either blue or red.
Motorsport Engineering brakes were either blue or red.
M Performance brakes were only offered as red.



Brake Pads
The standard 330i/430i pads are smaller and a very different shape than the M pads.
For the G2X models the brake pad changed size with each increase in rotor size. The contact area of the pad (swept area) got larger to match the increased diameter of the rotor. There are also other small details between them but because the size is different you will never be able to mix and match pads. However, because the calipers are so similar it could be very easy to order the wrong pads.

The M Performance (MP) and Motorsport Engineering (ME) pads are the same shape but different part numbers. This is not unusual and we suspect the ME brakes are more track-oriented. They likely have a higher coefficient of friction and will stop better when at higher brake temperatures. But as with any track-type pad they will be noisy when cold. We will update this page once we complete our testing and research.



Read More
Need help identifying which brakes I have. (g20.bimmerpost)
The M340i's ZTK Cooling and HP Tire Package is impressive (g20.bimmerpost)
New Track Package for the M340i in Canada (g20.bimmerpost)



Shop G20 / G22 Brake Parts:
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Front Brake Rotor, Zimmermann Coated - G20 330i, X3/X4 30i, Z4 30i

German-made, OEM-type replacement rotor with phosphate coating

Price: $110.99

197.11
View Product
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Front Brake Pad Set, OEM - G20, G22, G01 X3, G02 X4, G29 Z4 M40i

OEM brake pads for original braking performance on standard brakes (348mm). Replaces BMW part #34116889570.

Price: $253.99

View Product
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Front Left Brake Rotor, Zimmermann Coated - G20 G01 G02 G05 G29

German-made, OEM-type replacement rotor with phosphate coating

Price: $122.99

258.75
View Product
Zimmermann-Front-Right-Brake-Rotor-G20-34116860912-wp-tn.jpg

Front Right Brake Rotor, Zimmermann Coated - G20 M340i, G01, G02, G05, G29

German-made, OEM-type replacement rotor with phosphate coating

Price: $122.99

258.75
View Product
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Front Brake Pad Set, BMW - G20 G22 G23 G30 G12 G15 G05

Mildly aggressive M Sport brake pads. Direct replacement for BMW part #34106888459.

Price: $286.30

380.85
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Front Brake Pad Set, OEM- G20 G22 G23 G30 G12 G15 G05

OEM Ate brand set of mildly aggressive M Sport brake pads. Direct replacement for BMW part #34106888459.

Price: $259.40

380.85
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Front Left Dimpled Brake Rotor, M Performance - G20 330i/M340i, G22 430i/M440i

Front rotor used in M Performance BBK. Replaces BMW #34106895647.

Price: $432.74

487
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M-Performance-Big-Brake-Kit-G20-330i-M340i-34112450161-press-close-tn.jpg

Front Right Dimpled Brake Rotor, M Performance - G20 330i/M340i, G22 430i/M440i

Front rotor used in M Performance BBK. Replaces BMW #34106895648.

Price: $432.74

487.00
View Product
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