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The short version
- 1998-2005 GS300 (plus GS400 and GS430) front: press-in ball bearing 510017 with seal 1941, a press job.
- Same era rear: pressed bearing 511028.
- 2006-2009 GS300, GS350, GS430, GS450h and GS460 front: handed hub units, HA590137 on the right, HA590138 on the left, bolt-on.
- Nothing carries between the two eras, so a GS300 wheel bearing order has to start with the model year.
Lexus rebuilt this platform’s front suspension hardware partway through the model’s life, and the split falls right at 2006. Shoppers who assume one part fits the whole GS300 run end up with a box that does not bolt up. The fix is simple once the two eras are kept apart.
Two eras, one nameplate
The first-generation GS300 used a press-in front ball bearing and a separate seal, the same setup Lexus put in the LS400 and the SC coupes.
The redesigned GS switched to a bolt-on front hub, but that hub is handed. Order the wrong side and it will not go on.
GS300 wheel bearing part numbers
| Years | Detail | Number |
|---|---|---|
| 2006-2009 GS300 to GS460 | Front hub unit, right side | HA590137 check price |
| 2006-2009 GS300 to GS460 | Front hub unit, left side | HA590138 check price |
| 2006-2009 GS300 to GS460 | Rear bearing | own listings, match by VIN |
| 1998-2005 GS300/GS400/GS430 | Front bearing, press-in ball type | 510017 check price |
| 1998-2005 GS300/GS400/GS430 | Front seal | 1941 check price |
| 1998-2005 GS300/GS400/GS430 | Rear bearing, pressed | 511028 check price |
Every model year this chart resolves: 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 and 2009.
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.
The trap on this car is the handed front hub on the 2006-2009 body. HA590137 and HA590138 are mirror images of each other, not interchangeable side to side.
None of the 1998-2005 numbers carry forward either. A shop ordering a GS300 wheel bearing by memory instead of by VIN will get the wrong box more often than not.
What the early GS300 wheel bearing shares
The 1998-2005 front pairing, 510017 with seal 1941, is not unique to the GS. It is the same press-in bearing Lexus used in the LS400 and in the SC300 and SC400 coupes.
That overlap is why the early GS300 wheel bearing stays cheap and easy to source. Three related Lexus models draw from the same bin, so supply rarely runs thin. It is a press job, not a bolt-on swap, so budget shop time accordingly.
The later hub and its cousins
The handed HA590137 and HA590138 hub units are not exclusive to the second-generation GS either. Lexus fitted the same pair to the 2006-2008 IS250 and IS350, which sat under the GS in the lineup at the time.
Rear bearings for the 2006 and later GS have no single catalog listing. Buy by VIN and confirm the fitment before it ships. Related Lexus wheel bearing guides cover the rest of the lineup if the exact model year is unclear.
Diagnosing a GS300 wheel bearing
- Listen for the speed-linked hum. A worn GS300 wheel bearing produces a drone that rises and falls with road speed, not engine RPM.
- Jack up the corner and check for play. Grab the tire at 12 and 6 o’clock and rock it. Any looseness in the hub points to the bearing.
- Turn the wheel by hand. Roughness or grinding while spinning it freely usually means the bearing races are pitted.
- Confirm the noise moves with load. Weaving slightly at low speed and listening for a change helps separate a bearing from uneven tire wear.
- Rule out the source side. Bearing noise usually gets louder in turns away from the bad side, since that side carries more load.
Common questions
Do the 1998-2005 and 2006-2009 GS300 front bearings interchange?
No. The early car uses a press-in ball bearing and separate seal, while the later car uses a bolt-on handed hub. Neither part fits the other body style.
What is the rear bearing part number for the 2006-2009 GS?
There is no single number. Rear bearings for those years are own listings, so match by VIN.
Is the front GS300 wheel bearing a bolt-on part?
It depends on the year. The 1998-2005 front is a press-in bearing, while the 2006-2009 front is a bolt-on hub unit.
Can HA590137 be used on the left side instead of HA590138?
No. These are handed hub units built as mirror pairs. The wrong side will not seat correctly.
Does the GS300 wheel bearing share parts with other Lexus models?
Yes, in both eras. The early press-in bearing matches the LS400 and SC coupes, and the later hub matches the 2006-2008 IS250 and IS350.