Spec 10 BMW 335/535 Aluminum Flywheel
The SPEC SB53A-3 is the later-production version of SPEC's billet aluminum flywheel for N54 BMWs with a six-speed manual. It is for cars built from February 2009 on: the E9x 335i and E8x 135i through 2010, the E60 535i, and the 2011-2013 335is. If your late N54 has a dual-mass flywheel that knocks at idle, or you are building it with a SPEC non-ratcheting clutch and need the matching flywheel, this is the part. It ships same business day from the USA.
SPEC splits its N54 flywheels at the early 2009 production change and makes two versions. The -3 is for the later cars. Order the wrong one and the clutch parts will not line up, so the build date matters more than the model year here. SPEC lists the SB53A-3 at 16 lb.
The factory dual-mass flywheel uses internal springs to damp engine pulses. On a tuned N54, and on high-mileage cars, those springs wear out and the flywheel starts to rattle and shunt. The SB53A-3 is a single billet piece with no springs, so it cannot fail that way, and its lower mass lets the engine pick up and drop revs faster. Expect more idle gear rattle than a healthy dual-mass setup. For a heavier solid option, see the SB53S-3 steel flywheel.
Press the pedal at idle in neutral. If the noise changes, look at the flywheel first. To check slip, use fourth gear near 2,500 rpm at full throttle and watch whether the tach runs ahead of road speed; our slipping diagnosis guide covers that test. Also rule out the clutch hydraulics before you pull the gearbox.
SPEC lists the SB53A-3 for:
Our listing is titled 2010 BMW 335/535, but the production date is what decides it. Read the build month on the door jamb sticker. A 2009 car built in January 2009 or earlier needs the SB53A-2 instead. Note that SPEC still lists the -2 flywheel for the Z4 35i. The flywheel is designed for SPEC's non-ratcheting clutch kits, not the factory self-adjusting clutch. Send us your VIN and we will check it.
| Brand | SPEC |
| Part number | SB53A-3 |
| Fits | Spec 10 BMW 335/535 Aluminum Flywheel |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Only if the car was built from February 2009 on. SPEC lists earlier production N54 cars for the SB53A-2. Check the build month on the door jamb sticker or send us your VIN.
Yes. SPEC lists the SB53A-3 for the 2011-2013 335is with a SPEC non-ratcheting clutch kit.
No. The flywheel is meant for SPEC's non-ratcheting clutch kits, not the factory self-adjusting clutch.
SPEC lists it at 16 lb. It is a single billet aluminum piece with no internal springs.
Install the matching SPEC clutch kit with new flywheel bolts, check the rear main seal, and bleed the clutch hydraulics. Follow a gentle break-in before using full power.
