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These 2-piece floating rotors help dissipate heat better than a standard cast iron rotor and are also lighter for less unsprung weight. Managing heat in the brake system is vital to braking performance, especially on the track or when driven hard. It's why your brake rotors have internal vanes that vent heat as the rotor spins. These 2-piece ECS rotors feature an outer cast iron friction surface ring that is separate from the aluminum center hat. This allows better airflow through the vanes and for the friction ring can expand as it gets hot. The rotors are also cross-drilled for better ventilation and slotted to improve brake pad performance.
ECS 2-Piece Rotors feature:
These are the same size as the stock rotors so your stock caliper and mounting bracket will fit and there will be no clearance issues with your wheels or to other components. Stainless steel rotor retaining screws are included. You can use these with any brake pad.
Price is for the pair of 370mm brake rotors.
This item fits the following BMWs with 370mm M Sport/M Performance brakes:
2012+ F30 BMW 320i 320iX 328i 328iX 330i 330iX 335i 335iX 340i 340iX - Sedan
2012+ F31 BMW 328iX 330iX - Touring Wagon
2012+ F32 BMW 428i 428iX 430i 430iX 435i 435iX 440i 440iX - Coupe
2013+ F33 BMW 428i 428iX 430i 430iX 435i 435iX 440i 440iX - Convertible
2012+ F34 BMW 328i 328iX 330i 330iX 335i 335iX 340i 340iX - Gran Turismo
2012+ F36 BMW 428i 428iX 430i 430iX 435i 435iX 440i 440iX - GranCoupe
These 2-piece floating rotors help dissipate heat better than a standard cast iron rotor and are also lighter for less unsprung weight. Managing heat in the brake system is vital to braking performance, especially on the track or when driven hard. It's why your brake rotors have internal vanes that vent heat as the rotor spins. These 2-piece ECS rotors feature an outer cast iron friction surface ring that is separate from the aluminum center hat. This allows better airflow through the vanes and for the friction ring can expand as it gets hot. The rotors are also cross-drilled for better ventilation and slotted to improve brake pad performance.
ECS 2-Piece Rotors feature:
These are the same size as the stock rotors so your stock caliper and mounting bracket will fit and there will be no clearance issues with your wheels or to other components. Stainless steel rotor retaining screws are included. You can use these with any brake pad.
Price is for the pair of brake rotors.
This item fits the following BMWs:
This item fits the following BMWs with their stock braking systems:
2014+ F22 BMW M235i M235iX
2012+ F30 BMW 335i 335xi - Sedan
2014+ F32 BMW 435i 435iX - Coupe
2014+ F33 BMW 435i 435iX - Convertible
2014+ F34 BMW 335iX - Gran Turismo
2014+ F36 BMW 435i 435iX - Gran Coupe
This item fits the following BMWs with the S2NHA M Sport brake option:
2014+ F22 BMW 228i 228iX
2012+ F30 BMW 328i 328xi - Sedan
2012+ F31 BMW 328i 328iX - Wagon
2014+ F32 BMW 428i 428iX - Coupe
2014+ F33 BMW 428i 428iX - Convertible
2014+ F34 BMW 328i 328iX - Gran Turismo
2014+ F36 BMW 428i 428iX - Gran Coupe
| F30 Brake FAQ Articles |
| F30 328i Brake Package Differences |
| Brake Rotor Buying Guide |
Replacement front brake rotors (340x30) for the 2012+ F30 335i/335xi and F32 435i/435xi. These rotors fit the standard 335/435 brake package or a 2012-2013 US-market 335i M Sport.
Zimmerman rotors are finished with an anti-corrosion zinc dichromate coating over the entire rotor. This coating is applied over the rotor hat, face, and through the vanes for total corrosion protection. Even after a year of use the Zimmerman coating doesn't change color or effectiveness. The rotors are ready to use after correct bed-in procedures have been done. In addition, Zimmerman uses a high carbon content in their discs for improved thermal performance.
F30 Brake FAQ Articles
F30 328i Brake Package Differences
F30 335i Brake Package Differences
Price is for a pair of rotors.
This item fits the following BMWs with their stock braking systems:
2014+ F22 BMW M235i M235iX
2012+ F30 BMW 335i 335xi - Sedan
2014+ F32 BMW 435i 435iX - Coupe
2014+ F33 BMW 435i 435iX - Convertible
2014+ F34 BMW 335iX - Gran Turismo
2014+ F36 BMW 435i 435iX - Gran Coupe
This item fits the following BMWs with the S2NHA M Sport brake option:
2014+ F22 BMW 228i 228iX
2012+ F30 BMW 328i 328xi - Sedan
2012+ F31 BMW 328i 328iX - Wagon
2014+ F32 BMW 428i 428iX - Coupe
2014+ F33 BMW 428i 428iX - Convertible
2014+ F34 BMW 328i 328iX - Gran Turismo
2014+ F36 BMW 428i 428iX - Gran Coupe
Replacement rear brake rotors (330x20) for the 2012+ F30 335i/335xi and F32 435i/435xi. These rotors fit the standard 335/435 brake package (not the optional M Sport upgrade or M Performance brakes).
Zimmerman rotors are finished with an anti-corrosion zinc dichromate coating over the entire rotor. This coating is applied over the rotor hat, face, and through the vanes for total corrosion protection. Even after a year of use the Zimmerman coating doesn't change color or effectiveness. The rotors are ready to use after correct bed-in procedures have been done. In addition, Zimmerman uses a high carbon content in their discs for improved thermal performance.
F30 Brake FAQ Articles
F30 328i Brake Package Differences
F30 335i Brake Package Differences
Price is for a pair of rotors.
These rear brake discs / brake rotors fit:
2012+ F30 BMW 335i - Sedan
2014+ F32 BMW 435i 435iX - Coupe
2014+ F35 BMW 435i 435xi - Convertible
Replacement front brake rotors (370x30) for the 2012+ F3X 335/435 with the largest M Sport brakes (option code S2NHA). These will also work on the M Performance big brake kit.
Zimmerman rotors are finished with an anti-corrosion zinc dichromate coating over the entire rotor. This coating is applied over the rotor hat, face, and through the vanes for total corrosion protection. Even after a year of use the Zimmerman coating doesn't change color or effectiveness. The rotors are ready to use after correct bed-in procedures have been done. In addition, Zimmerman uses a high carbon content in their discs for improved thermal performance.
F30 Brake FAQ Articles
F30 328i Brake Package Differences
F30 335i Brake Package Differences
Brake Rotor Buying Guide
Price is for a pair of rotors.
These rear brake discs / brake rotors fit:
2012+ F30 BMW 335i 335iX 340i 340iX - Sedan
2012+ F32 BMW 435i 435iX 440i 440iX - Coupe
2013+ F33 BMW 435i 435iX 440i 440iX - Convertible
2012+ F34 BMW 335i 335iX 340i 340iX - Gran Turismo
2012+ F36 BMW 435i 435iX 440i 440iX - GranCoupe
Upgrade your BMW's braking system with a pair of budget-friendly Zimmerman brake rotors. These quality replacements offer stock-like performance, ensuring safety and reliability without compromising on quality. Designed to combat issues like excessive rust and warping, these rotors guarantee smooth braking, eliminating vibrations and steering wheel shudders often associated with damaged rotors. Consider pairing them with ECS Tuning's diverse selection of stock replacement or performance brake pads to restore or enhance your braking system's performance.
Direct replacement REAR brake rotor for F3X 320iX/328iX and F32 428i/428iX with the N26 SULEV engine.
Zimmermann rotors are finished with an anti-corrosion zinc dichromate coating over the entire rotor. This coating is applied over the rotor hat, face, and through the vanes for total corrosion protection. Even after a year of use the Zimmerman coating doesn't change color or effectiveness. The rotors are ready to use after correct bed-in procedures have been done. In addition, Zimmerman uses a high carbon content in their discs for improved thermal performance.
F30 Brake FAQ Articles
F30 328i Brake Package Differences
Price is for a pair of rotors.
This item fits the following BMWs:
2012+ F30 BMW 320iX 328iX - Sedan
2012+ F31 BMW 328i 328iX - Wagon
2014+ F34 BMW 328i 328iX - Gran Turismo
2014+ F32 BMW 428iX - Coupe
2014+ F33 BMW 428i 428iX with N26 engine only - Convertible
N26 engine: the rear rotors were different on the F33 428 convertible based on which engine the car has. N20 is the ULEV engine; N26 is the SULEV low emissions engine. The emissions sticker under the hood will be labeled ULEV or SULEV.Application note: these rotors fit cars not equipped with the factory M Sport package or M Sport brakes upgrade
BMW F30 Front Brembo Rotor 370mm - OE Equivalent provides exceptional braking performance and durability for BMW drivers looking to maintain OE quality with Turner Motorsport’s trusted expertise. Engineered to the exact specifications of the original equipment, this Brembo rotor ensures reliable stopping power and superior heat dissipation, making it ideal for both everyday driving and spirited performance.
Replacement REAR brake rotors (345x24) for the 2012+ F3X 335/435 with M Sport brakes (option code S2NHA). These will also work on the M Performance big brake kit (but have a blank design instead of dimpled/slotted).
Zimmerman rotors are finished with an anti-corrosion zinc dichromate coating over the entire rotor. This coating is applied over the rotor hat, face, and through the vanes for total corrosion protection. Even after a year of use the Zimmerman coating doesn't change color or effectiveness. The rotors are ready to use after correct bed-in procedures have been done. In addition, Zimmerman uses a high carbon content in their discs for improved thermal performance.
F30 Brake FAQ Articles
F30 328i Brake Package Differences
F30 335i Brake Package Differences
Brake Rotor Buying Guide
Price is for a pair of rotors.
These rear brake discs / brake rotors fit:
2012+ F30 BMW 320i 320iX 328i 328iX 330i 330iX 335i 335iX 340i 340iX - Sedan
2012+ F31 BMW 328iX 330iX - Touring Wagon
2012+ F32 BMW 428i 428iX 430i 430iX 435i 435iX 440i 440iX - Coupe
2013+ F33 BMW 428i 428iX 430i 430iX 435i 435iX 440i 440iX - Convertible
2012+ F34 BMW 328i 328iX 330i 330iX 335i 335iX 340i 340iX - Gran Turismo
2012+ F36 BMW 428i 428iX 430i 430iX 435i 435iX 440i 440iX - GranCoupe
This is a Genuine BMW REAR brake rotor/disc (345x24mm) for all F30, F31 F32 F33 and F34 models with the BMW M Performance brakes. These will also work on the F3X 328iX/428iX with the optional M Sport Brakes upgrade. These rotors are dimpled and slotted to improve brake pad feel and give the brakes a sportier and more aggressive look. In addition, they are larger that the standard brake rotors to help in braking performance. These are not a direct replacement for the stock brakes and will only work with the M Performance or optional M Sport brake upgrade (328iX/428iX).
The M Performance brakes were a dealer-installed accessory that could have been ordered new or installed after the car was delivered. M Performance brakes were larger than stock and had a colored brake caliper (red, yellow, or orange). The M Sport 328iX/428iX optional brakes (option code S2NHA) were available as an additional option on top of the M Sport trim package but could also be ordered on their own. They featured the same size brakes as the M Performance accessory but with either blue or unfinished grey 2-piston Brembo calipers. Note that the RWD 328i/428i also used a 345mm rear rotor but the AWD has a different parking brake system. See below for a breakdown of the exact exact models and packages this rotor will work on.
F30 Brake FAQ Articles
F30 328i Brake Package Differences
F30 335i Brake Package Differences
This item fits the following BMWs with the M Performance accessory upgrade:
2012+ F30 BMW 320i 320iX 328i 328iX 335i 335iX - Sedan
2012+ F31 BMW 328i 328iX - Wagon
2014+ F34 BMW 328i 328iX - Gran Turismo
2014+ F32 BMW 428i 428iX 435i 435iX - Coupe
2014+ F33 BMW 428i 428iX 435i 435iX - Convertible
2014+ F36 BMW 428i 428iX 435i 435iX - Gran Coupe
This item fits the following BMWs (with S2NHA M Sport Brake Upgrade):
2012+ F30 BMW 320iX 328iX - Sedan
2012+ F31 BMW 328i 328iX - Wagon
2014+ F34 BMW 328i 328iX - Gran Turismo
2014+ F32 BMW 428iX - Coupe
2014+ F33 BMW 428i 428iX with N26 engine only - Convertible
2014+ F36 BMW 428i 428iX - Gran Coupe
N26 engine: the rear rotors were different on the F33 428 convertible based on which engine the car has. N20 is the ULEV engine; N26 is the SULEV low emissions engine. The emissions sticker under the hood will be labeled ULEV or SULEV.
This is a pair (2) of Genuine BMW REAR brake rotors/discs (345x24mm) for all F30, F31 F32 F33 and F34 models with the BMW M Performance brakes. These will also work on the F3X 328iX/428iX with the optional M Sport Brakes upgrade. These rotors are dimpled and slotted to improve brake pad feel and give the brakes a sportier and more aggressive look. In addition, they are larger that the standard brake rotors to help in braking performance. These are not a direct replacement for the stock brakes and will only work with the M Performance or optional M Sport brake upgrade (328iX/428iX).
The M Performance brakes were a dealer-installed accessory that could have been ordered new or installed after the car was delivered. M Performance brakes were larger than stock and had a colored brake caliper (red, yellow, or orange). The M Sport 328iX/428iX optional brakes (option code S2NHA) were available as an additional option on top of the M Sport trim package but could also be ordered on their own. They featured the same size brakes as the M Performance accessory but with either blue or unfinished grey 2-piston Brembo calipers. Note that the RWD 328i/428i also used a 345mm rear rotor but the AWD has a different parking brake system. See below for a breakdown of the exact exact models and packages these rotors will work on.
F30 Brake FAQ Articles
F30 328i Brake Package Differences
F30 335i Brake Package Differences
Price is for a pair of rotors.
This item fits the following BMWs with the M Performance accessory upgrade:
2012+ F30 BMW 320i 320iX 328i 328iX 335i 335iX - Sedan
2012+ F31 BMW 328i 328iX - Wagon
2014+ F34 BMW 328i 328iX - Gran Turismo
2014+ F32 BMW 428i 428iX 435i 435iX - Coupe
2014+ F33 BMW 428i 428iX 435i 435iX - Convertible
2014+ F36 BMW 428i 428iX 435i 435iX - Gran Coupe
This item fits the following BMWs (with S2NHA M Sport Brake Upgrade):
2012+ F30 BMW 320iX 328iX - Sedan
2012+ F31 BMW 328i 328iX - Wagon
2014+ F34 BMW 328i 328iX - Gran Turismo
2014+ F32 BMW 428iX - Coupe
2014+ F33 BMW 428i 428iX with N26 engine only - Convertible
2014+ F36 BMW 428i 428iX - Gran Coupe
N26 engine: the rear rotors were different on the F33 428 convertible based on which engine the car has. N20 is the ULEV engine; N26 is the SULEV low emissions engine. The emissions sticker under the hood will be labeled ULEV or SULEV.
This is a Genuine BMW FRONT brake rotor/disc (370x30mm) for all F30, F31 F32 F33 and F34 models with either the BMW M Performance brakes or 335/435 with the optional M Sport brakes upgrade. These rotors are dimpled and slotted to improve brake pad feel and give the brakes a sportier and more aggressive look. In addition, they are larger that the standard brake rotors to help in braking performance. These are not a direct replacement for the stock brakes and will only work with the M Performance or optional M Sport brake upgrade.
The M Performance brakes were a dealer-installed accessory that could have been ordered new or installed after the car was delivered. M Performance brakes were larger than stock and had a colored brake caliper (red, yellow, or orange). The M Sport 335/435 optional brakes (option code S2NH or S2NHA) were available as an additional option on top of the M Sport trim package but could also be ordered on their own. They featured the same size brakes as the M Performance accessory but with either blue or unfinished grey calipers. Note that only the 335 and 435 M Sport upgrade used 370mm rotors; the 328i/428i M Sport option used a 340mm rotor. See below for a breakdown of the exact exact models and packages these rotors will work on. And for more information on the brakes for the F30/F32 chassis, see our FAQ page.
F30 Brake FAQ Articles
F30 328i Brake Package Differences
F30 335i Brake Package Differences
This item fits the following BMWs with the M Performance accessory upgrade:
2012+ F30 BMW 320i 320iX 328i 328iX 335i 335iX - Sedan
2012+ F31 BMW 328i 328iX - Wagon
2014+ F34 BMW 328i 328iX - Gran Turismo
2014+ F32 BMW 428i 428iX 435i 435iX - Coupe
2014+ F33 BMW 428i 428iX 435i 435iX - Convertible
2014+ F36 BMW 428i 428iX 435i 435iX - Gran Coupe
This item fits the following BMWs with the S2NH/S2NHA M Sport brake option:
2012+ F30 BMW 335i 335i xDrive - Sedan
2014+ F34 BMW 335i xDrive GT - Gran Tourismo
2013+ F32 BMW 435i 435i xDrive - Coupe
2013+ F33 BMW 435i Convertible - Convertible
Replacement rear brake rotors (330x20) for the 2012+ F30 335i/335xi and F32 435i/435xi. These rotors fit the standard 335/435 brake package (not the optional M Sport upgrade or M Performance brakes).
F30 Brake FAQ Articles
F30 335i Brake Package Differences
Price is for a pair of rotors.
This item fits the following BMWs:
2012+ F30 BMW 335i 335iX - Sedan
2014+ F32 BMW 435i 435iX - Coupe
2014+ F33 BMW 435i 435iX - Convertible
2014+ F34 BMW 335iX - Gran Turismo
2014+ F36 BMW 428i 428iX 435i 435iX - Gran Coupe
| F30 Brake FAQ Articles |
| F30 328i Brake Package Differences |
| Brake Rotor Buying Guide |
| F30 Brake FAQ Articles |
| F30 328i Brake Package Differences |
| Brake Rotor Buying Guide |
Direct replacement REAR brake rotor for F30 320i/328i and F32 428i (RWD models) and F33 428i/428iX convertibles (with N20 engine, not N26 SULEV).
Zimmerman rotors are finished with an anti-corrosion zinc dichromate coating over the entire rotor. This coating is applied over the rotor hat, face, and through the vanes for total corrosion protection. Even after a year of use the Zimmerman coating doesn't change color or effectiveness. The rotors are ready to use after correct bed-in procedures have been done. In addition, Zimmerman uses a high carbon content in their discs for improved thermal performance.
F30 Brake FAQ Articles
F30 328i Brake Package Differences
Price is for a pair of rotors.
This item fits the following BMWs:
2014+ F22 BMW 228i 228iX
2012+ F30 BMW 320i 328i - Sedan
2014+ F32 BMW 428i - Coupe
2014+ F33 BMW 428i 428iX with N20 engine only - Convertible
N20 engine: the rear rotors were different on the F33 428 convertible based on which engine the car has. N20 is the ULEV engine; N26 is the SULEV low emissions engine. The emissions sticker under the hood will be labeled ULEV or SULEV.
Application note: these rotors fit cars not equipped with the factory M Sport package or M Sport brakes upgrade
| F30 Brake FAQ Articles |
| F30 328i Brake Package Differences |
| F30 335i Brake Package Differences |
| Brake Rotor Buying Guide |
These REAR rotors fit to F22 228, F30 328, and F32 428 models with the optional M Sport Brakes upgrade (option code S2NHA). These rotors are larger and have a dimpled/slotted surface compared to what came on the base, Luxury, Modern, Sport, and M Sport trim packages. The dead giveaway whether or not you have the M Sport option is the rear caliper - the S2NHA option added 2-piston Brembo calipers on the rear while all of the brakes were a standard single piston caliper (a Brembo caliper was also used on the front for S2NHA).
These rotors were originally part of the M Performance package, which was an accessory installed after the car was delivered. It was BMW's version of an aftermarket big brake kit but these rear rotors happen to be a direct fit to 228/328/428 when equipped with the optional S2NHA M Sport brake upgrade. They are dimpled and slotted to improve brake pad feel and give the brakes a sportier and more aggressive look. In addition, they are larger that the standard brake rotors to help in braking performance, especially when driven hard.
F30 Brake FAQ Articles
F30 328i Brake Package Differences
Price is for a pair of rotors.
This item fits the following BMWs (with S2NHA M Sport Brake Upgrade):
2014+ F22 BMW 228i 228iX
2012+ F30 BMW 328i - Sedan
2014+ F32 BMW 428i - Coupe
2014+ F33 BMW 428i 428iX with N20 engine only - Convertible
N20 engine: the rear rotors were different on the F33 428 convertible based on which engine the car has. N20 is the ULEV engine; N26 is the SULEV low emissions engine. The emissions sticker under the hood will be labeled ULEV or SULEV.
This is a pair (2) of Genuine BMW FRONT brake rotors/discs (370x30mm) for all F30, F31 F32 F33 and F34 models with either the BMW M Performance brakes or 335/435 with the optional M Sport brakes upgrade. These rotors are dimpled and slotted to improve brake pad feel and give the brakes a sportier and more aggressive look. In addition, they are larger that the standard brake rotors to help in braking performance. These are not a direct replacement for the stock brakes and will only work with the M Performance or optional M Sport brake upgrade.
The M Performance brakes were a dealer-installed accessory that could have been ordered new or installed after the car was delivered. M Performance brakes were larger than stock and had a colored brake caliper (red, yellow, or orange). The M Sport 335/435 optional brakes (option code S2NH or S2NHA) were available as an additional option on top of the M Sport trim package but could also be ordered on their own. They featured the same size brakes as the M Performance accessory but with either blue or unfinished grey calipers. Note that only the 335 and 435 M Sport upgrade used 370mm rotors; the 328i/428i M Sport option used a 340mm rotor. See below for a breakdown of the exact exact models and packages these rotors will work on. And for more information on the brakes for the F30/F32 chassis, see our FAQ page.
F30 Brake FAQ Articles
F30 328i Brake Package Differences
F30 335i Brake Package Differences
Price is for a pair of rotors.
This item fits the following BMWs with the M Performance accessory upgrade:
2012+ F30 BMW 320i 320iX 328i 328iX 335i 335iX - Sedan
2012+ F31 BMW 328i 328iX - Wagon
2014+ F34 BMW 328i 328iX - Gran Turismo
2014+ F32 BMW 428i 428iX 435i 435iX - Coupe
2014+ F33 BMW 428i 428iX 435i 435iX - Convertible
2014+ F36 BMW 428i 428iX 435i 435iX - Gran Coupe
This item fits the following BMWs with the S2NH/S2NHA M Sport brake option:
2012+ F30 BMW 335i 335i xDrive - Sedan
2014+ F34 BMW 335i xDrive GT - Gran Tourismo
2013+ F32 BMW 435i 435i xDrive - Coupe
2013+ F33 BMW 435i Convertible - Convertible
Replacement FRONT brake rotors (340x30) for the 2012+ F22 M235i/xi, F30 335i/335xi and F32 435i/435xi. These are the standard rotors fitted to 335/435 with base, Luxury, Modern, and Sport packages. They will also fit on the 2012-2013 US-market 335i M Sport brake option (option code S2NHA and grey unfinished calipers). These are also the rotors for a 228/328/428 with the M Sport brake option (option code S2NHA).
F30 Brake FAQ Articles
F30 328i Brake Package Differences
F30 335i Brake Package Differences
Price is for a pair of rotors.
This item fits the following BMWs with their stock braking systems:
2014+ F22 BMW M235i M235iX
2012+ F30 BMW 335i 335xi - Sedan
2014+ F32 BMW 435i 435iX - Coupe
2014+ F33 BMW 435i 435iX - Convertible
2014+ F34 BMW 335iX - Gran Turismo
2014+ F36 BMW 435i 435iX - Gran Coupe
This item fits the following BMWs with the S2NHA M Sport brake option:
2014+ F22 BMW 228i 228iX
2012+ F30 BMW 328i 328xi - Sedan
2012+ F31 BMW 328i 328iX - Wagon
2014+ F32 BMW 428i 428iX - Coupe
2014+ F33 BMW 428i 428iX - Convertible
2014+ F34 BMW 328i 328iX - Gran Turismo
2014+ F36 BMW 428i 428iX - Gran Coupe
These rotors fit to F22 228, F30 328, and F32 428 models with the optional M Sport Brakes upgrade (option code S2NHA). These are a much larger rotor than what came on the base, Luxury, Modern, Sport, and M Sport trim packages. The dead giveaway whether or not you have the M Sport option is the rear caliper - the S2NHA option added 2-piston Brembo calipers on the rear while all of the brakes were a standard single piston caliper (a Brembo caliper was also used on the front for S2NHA).
F30 Brake FAQ Articles
F30 328i Brake Package Differences
Price is for a pair of rotors.
This item fits the following BMWs (with S2NHA M Sport Brake Upgrade):
2014+ F22 BMW 228i 228iX
2012+ F30 BMW 328i - Sedan
2014+ F32 BMW 428i - Coupe
2014+ F33 BMW 428i 428iX with N20 engine only - Convertible
N20 engine: the rear rotors were different on the F33 428 convertible based on which engine the car has. N20 is the ULEV engine; N26 is the SULEV low emissions engine. The emissions sticker under the hood will be labeled ULEV or SULEV.