2006-2018 BMW 335i Brake Upgrade Options

By Core Brake Parts Tech Team — Circleville, OH warehouse

The best brake upgrade for a BMW 335i depends on which 335i you own. On the E90/E92/E93 cars (2007 to 2013) the smart money goes into quality pads, fresh rotors and new fluid on the stock single-piston floating calipers, and on an F30 (2012 and later) the biggest step is converting a base car to the factory M Sport 370 mm Brembo package. A big brake kit only makes sense once you are regularly overheating pads on track.

Know Which 335i Brakes You Have First

BMW sold the 335i name across two very different 3 Series generations, and parts do not cross over. Before you buy anything, confirm your chassis code, drive type and production date.

E90, E92 and E93 (2007 to 2013)

The N54 and later N55 powered E9X 335i uses a 348 mm by 30 mm vented front rotor gripped by a single-piston sliding caliper, with a smaller single-piston caliper and vented rotor out back. That front rotor is shared by the 335i, 335is and 335xi coupes, convertibles and sedans, but BMW changed the sedan for 2012, so a 2012 or newer four-door is not an E90 and does not take the same rotor.

There is also a mid-cycle split that trips people up: brake kits for these cars are sold separately for cars built before March 2010 and cars built after March 2010. Model year is not enough here. Read the production month off the sticker in the driver door jamb before you order pads or rotors, and check whether the car is rear drive or xDrive (335xi / 335i xDrive), because the all-wheel-drive cars use their own parts.

F30 and F32 (2012 to 2018)

The F30 sedan and F32 coupe 335i and 435i came with three different brake setups:

The M Sport package did not add bigger hardware; it only changed pad compounds. Blue calipers are the quick visual tell for the real M Sport Brakes. That option required 18-inch wheels, and from 2016 it could only be ordered as part of the Track Handling Package rather than on its own.

Signs Your 335i Needs More Than New Pads

A 335i is a heavy, quick car, and the stock brakes on both generations are built for street driving. Upgrade symptoms look different from ordinary wear:

• Pedal goes long or soft after a hard run. This is usually brake fluid boiling, not worn parts. Fresh, higher-boiling fluid is the cheapest fix.
• Fade that recovers after the car cools. The pad compound is past its temperature range. A performance pad is the answer.
• Vibration under braking at highway speed. Uneven pad deposits or rotor thickness variation. Replace the rotors and bed the new pads properly.
• Grinding or the brake wear warning on the dash. These cars use electronic pad wear sensors. Once a sensor has worn through it must be replaced along with the pads.
• Cracks running out from drilled holes, or a lip on the rotor edge. Measure thickness; rotors below the minimum stamped on the hat must go.

Upgrade Step 1: Brake Fluid

If your pedal fades on a mountain road or at an autocross, start here. Federal Motor Vehicle Safety Standard 116 sets minimum boiling points for each fluid grade, and the gap between them is exactly what you feel when the pedal goes soft:

"Wet" means fluid that has absorbed moisture over time, which is why old fluid boils so much sooner than new. Use the fluid specification in your owner's manual or on the reservoir cap, flush on the schedule BMW gives, and flush before any track day. Never put silicone DOT 5 into a BMW system.

Upgrade Step 2: Performance Pads

For most 335i owners, pads are where the real change happens. A stronger compound adds bite and fade resistance on the stock calipers and rotors with no fitment risk. The trade-off is more dust and, with aggressive track compounds, some noise when cold.

• Daily driver: a quality low-dust ceramic brake pad keeps the wheels clean and stops the car well in everyday use.
• Spirited street and occasional track: a performance street/track compound. For 2006 to 2012 E9X cars we carry EBC Bluestuff NDX front pads for the E90/E92/E93 335i and the matching EBC Bluestuff NDX rear pads for the E9X 335i. For the F30, see the EBC Bluestuff NDX rear pad set for the 2013-2018 F30 335i.
• Dedicated track car: a race compound, swapped back to a street pad for daily use.

Keep front and rear compounds in the same family. A very aggressive front pad with a mild rear pad shifts brake balance forward and changes how the car behaves under hard braking.

Upgrade Step 3: Rotors

New rotors should go on with new performance pads unless the old rotors are well above minimum thickness and dead flat, because a fresh pad beds best on a fresh surface. Your options are:

• OE-style blank rotors: the most durable choice for street and track. Look for good cooling vane design; DBA's 348 mm by 30 mm HD rotor, for example, uses curved "Kangaroo Paw" vents and lists a 28.4 mm minimum thickness.
• Slotted rotors: slots wipe the pad face and keep bite consistent. Good for hard street driving.
• Drilled and slotted rotors: the classic look. Fine on a street car, but on repeated track sessions the holes are where heat cracks start.
• Two-piece floating rotors: an aluminum hat with an iron ring. Lighter and better at shedding heat, at a higher price.

Browse our brake rotors by vehicle, and install new rotor retaining screws and a fresh pad wear sensor with them.

Upgrade Step 4: Bigger Brakes

Only move to bigger calipers and rotors once fluid, pads and rotors are sorted and you still overheat the brakes.

F30/F32 owners have the easiest path: the factory M Sport Brakes (370 mm front, 345 mm rear, blue Brembo calipers) fit the same car, and BMW's later M Performance red, orange or yellow calipers are interchangeable with them. The larger front rotor needs 18-inch wheels, so check your wheels before you buy.

E9X owners need an aftermarket big brake kit, which typically replaces the single-piston front caliper with a fixed multi-piston unit and a larger two-piece rotor. Expect to need wheels that clear it, and budget for pads that fit the new caliper.

What to Replace at the Same Time and How Hard the Job Is

Pads and rotors on either generation are a straightforward driveway job with basic hand tools, a torque wrench and a scan tool or procedure to clear the service reminder. Plan on:

• New pad wear sensors front and rear if the old ones have been triggered.
• New rotor retaining screws and, on the E9X, new caliper slide hardware or a brake hardware kit if the pins are dry or the boots are torn.
• A full fluid flush, since the system is already open.
• Stainless braided brake lines if you are tracking the car; they firm up the pedal slightly and resist swelling when hot.

Torque caliper bolts and wheel bolts to the values in the factory service information, clean rust off the hub face before fitting new rotors, and bed the pads with a series of moderate stops before any hard use. A full caliper swap to M Sport Brakes or a big brake kit adds bleeding the system and possibly new lines, which makes it a solid intermediate job.

A check of NHTSA's recall database for the 2008 335i showed campaigns for air bags and electrical items but no brake recalls, so an upgrade here is about performance, not a known defect. Run your own VIN through NHTSA before buying parts for any used car.

Frequently Asked Questions

Will F30 M Sport brakes fit an E90 335i?

No. The E9X and F3X are different chassis with different knuckles and mounting. Upgrade parts must be chosen for your chassis code.

How do I tell if my F30 has M Sport brakes?

Look through the wheel. The M Sport Brakes use blue Brembo calipers, a 370 mm front rotor and a two-piston rear caliper. Grey calipers mean the 340 mm system, even on a car with the M Sport package.

Do I need to replace rotors when I upgrade pads?

It is strongly recommended. A new compound will not bed cleanly onto a rotor coated with the old pad's material, and uneven deposits cause vibration. At minimum, rotors must be above their stamped minimum thickness and free of cracks.

Why does my 335i need a new brake pad sensor?

The sensor is designed to wear through when the pads reach their limit, which is what triggers the dash warning. Once worn through it cannot reset, so it is replaced with the pads.

Is it worth upgrading the rear brakes?

Match the rear pad compound to the front so balance stays correct. Bigger rear hardware matters less than the front, since the front axle does most of the stopping.

Sources

1. BimmerWorld - F30 M Sport Brakes - F30/F32 335i base, P337A, S2NH and ZTR rotor sizes, caliper pistons, 18-inch wheel requirement, M Performance interchange
2. BimmerWorld - E9X 335i front brake kit (early) - pre/post March 2010 production-date split, pad sensor and rotor screws
3. BimmerWorld - E9X 335i front rotor - shared E90/E92/E93 335i fitment and 2012+ sedan exclusion
4. Progressive Parts - E90 335i front discs - 348 x 30 mm front rotor size
5. DBA - 4000 Series HD rotor DBA42858 - 348 x 30 mm rotor, 28.4 mm minimum thickness, Kangaroo Paw vents
6. 49 CFR 571.116 (FMVSS 116) - DOT 3, DOT 4 and DOT 5.1 minimum boiling points
7. NHTSA recalls - 2008 BMW 335i - no brake-related recall campaigns