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The short version
- A Cadillac STS wheel bearing lookup starts with the wheel studs. Five stud and six stud cars use different numbers at both ends.
- RWD front: 512246 on 5-stud cars, 513197 on 6-stud cars. AWD front is 513238 for 2005-2010, and for 2008-2010 that excludes cars with Brembo brakes.
- Rear numbers also split by stud count: 512223 for 5-stud cars, 512243 for 6-stud.
- The same-era Cadillac CTS uses the identical 512223 and 512243 rear split, since the two cars share underpinnings.
Cadillac sold the STS on two different wheel stud patterns during its 2005-2011 run. Neither the front nor the rear bearing number is safe to guess without counting studs first.
Cadillac STS wheel bearing numbers at a glance
A 5-stud STS and a 6-stud STS take different front and rear bearings. RWD and AWD add another split on top of that.
Count the studs on the wheel before opening a catalog page. Year and trim alone will not settle it.
Cadillac STS wheel bearing part numbers
| Years | Detail | Number |
|---|---|---|
| 2005-2010 | Front hub, AWD (2008-2010 excludes Brembo brakes) | 513238 check price |
| 2005-2011 | Front hub, RWD, 6-stud wheel | 513197 check price |
| 2005-2011 | Front hub, RWD, 5-stud wheel | 512246 check price |
| 2005-2011 | Rear hub, 6-stud wheel | 512243 check price |
| 2005-2011 | Rear hub, 5-stud wheel | 512223 check price |
Every model year this chart resolves: 2005, 2006, 2007, 2008, 2009, 2010 and 2011.
Price links lead to Amazon searches for that number. As an Amazon Associate this site earns from qualifying purchases.
Lookups run through the cross reference page.
Stud count decides the Cadillac STS wheel bearing number at both ends of the car. A 5-stud front takes 512246, a 6-stud front takes 513197. The same split repeats on the rear, between 512223 and 512243.
Count the wheel studs before ordering anything. AWD adds a further wrinkle up front: 2008-2010 cars with Brembo brakes are excluded from the 513238 row and need their own lookup.
Cadillac STS wheel bearing family: the Sigma platform
The STS shares its Sigma platform with the same-era Cadillac CTS. The rear bearing numbers match exactly: 512223 for 5-stud cars and 512243 for 6-stud cars on both models.
The Cadillac SRX rode on related architecture from the same era. Its own bearing rows stay separate from the STS. The Cadillac lineup page covers the rest of the brand.
A note on the older Seville STS
Cadillac used the STS badge before 2005 on the Seville STS, a front wheel drive car built on a different platform. None of the rows above apply to it.
Anyone working on a pre-2005 STS badged Cadillac should treat it as a Seville, not this Sigma platform sedan. Look up parts accordingly.
Diagnosing a Cadillac STS wheel bearing
- Count the wheel studs. Five or six studs points you to the correct row before anything else.
- Confirm RWD or AWD. AWD cars take a different front number than RWD cars.
- Listen for a load-sensitive hum. A worn Cadillac STS wheel bearing often changes pitch when the car weights over in a turn.
- Rock the wheel at twelve and six. Looseness at the hub points to bearing wear rather than a suspension bushing.
- Check for a Brembo brake package on 2008-2010 AWD cars. That option changes which front number applies.
The general routine is on the checking page. The ABS warning light connection is covered on the ABS light page.
Common questions
How do I know if my STS is 5-stud or 6-stud?
Count the wheel studs directly, or check the wheel bolt pattern against the sale listing. Year alone does not settle it.
Does AWD change the Cadillac STS wheel bearing number?
Yes, up front. AWD cars from 2005-2010 use 513238, except 2008-2010 cars with Brembo brakes.
Do CTS parts fit my STS?
The rear numbers do. Both cars use 512223 on 5-stud wheels and 512243 on 6-stud wheels.
Is a pre-2005 STS covered by these numbers?
No. That car was the Seville STS, a different platform entirely, and none of these rows apply to it.
What is the rear Cadillac STS wheel bearing number?
512223 on 5-stud wheels, 512243 on 6-stud wheels, across the full 2005-2011 run.