Spec 11-13 BMW 335is 3.0L Steel Flywheel (6-Bolt)
The SPEC SB53S-3 is the late-production steel flywheel for N54 BMWs with the six-speed manual. SPEC lists it for the 2011-2013 335is and for the 135i, E9x 335i and E60 535i built from early 2009 through 2010. If your late N54 has a dual-mass flywheel that rattles at idle or bucks when you pull away, or you are building the car around a SPEC non-ratcheting clutch and need the flywheel that matches it, this is the part. It ships the same business day from the USA.
SPEC splits its N54 flywheels at the early 2009 production change and builds a separate -3 version for the later cars. Fitting the early -2 flywheel to a late car, or the reverse, means the clutch parts will not match up, so the build month decides this purchase more than the model year does. Our listing title calls this the 6-bolt version, against the 8-bolt early SB53S-2. When the old flywheel comes off, counting the crank bolts is an easy way to double-check what you have.
The factory flywheel is a dual-mass design: two halves joined by springs that absorb engine pulses. The 335is came from the factory with more boost than the regular 335i, and tuned cars push even harder, so those springs wear out and the flywheel starts to knock and shunt. The SB53S-3 replaces it with one solid piece of billet steel. With nothing inside to wear, the failure simply goes away.
SPEC lists it at 24 lb, a full 8 lb heavier than the SB53A-3 aluminum flywheel for the same cars. On a daily-driven 335is that weight helps: easier launches, smoother stop-and-go driving and more thermal mass for repeated hard pulls. The trade-off is slower rev changes than the aluminum wheel. Any solid flywheel also brings more idle gear rattle than a fresh dual-mass unit, so expect some.
Listen at idle in neutral, then press the pedal. A noise that changes with the pedal points at the flywheel. To check for slip, pull from around 2,500 rpm in fourth gear at full throttle and watch whether engine speed rises without the car pulling harder; the slipping diagnosis guide explains the test and the hydraulic checks to do first. A dual-mass flywheel that rocks or spins noticeably between its halves once it is out is finished.
SPEC lists the SB53S-3 for:
Our listing is titled for the 2011-2013 335is, but the earlier late-build cars are on SPEC's list too. SPEC still points the N54 Z4 35i to the -2 flywheel, and a 2009 car built in January 2009 or earlier needs the SB53S-2. Check the build month on the door jamb sticker. The flywheel is designed for SPEC's non-ratcheting clutch kits, not the factory self-adjusting clutch. Send us your VIN and we will confirm the version before it ships.
| Brand | SPEC |
| Part number | SB53S-3 |
| Fits | Spec 11-13 BMW 335is 3.0L Steel Flywheel (6-Bolt) |
| Vehicle fitment | BMW 335Is (2011-2013) |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Yes. SPEC lists it for E9x 335i and 135i cars built from February 2009 through 2010, the E60 535i from early 2009, and the 2011-2013 335is.
Check the build month on the door jamb sticker. January 2009 or earlier takes the SB53S-2; February 2009 or later takes the SB53S-3. If in doubt, send us your VIN.
SPEC lists the steel SB53S-3 at 24 lb and the aluminum SB53A-3 at 16 lb. Steel is easier to drive daily and holds heat better; aluminum revs up and down faster.
No. It is built for SPEC non-ratcheting clutch kits, not the factory self-adjusting clutch.
SPEC still lists the -2 flywheel for the Z4 35i, so the SB53S-2 is the steel option for that car.
