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The short version
- The J30 wheel bearing up front is a serviceable assembly, JRM3449-90UA1, with seal 710292.
- That front assembly is adjusted and repacked, not swapped as a sealed cartridge.
- The 1997-2001 Infiniti Q45 used the same front assembly, which keeps a J30 wheel bearing easy to source.
- The rear bearing holds no dedicated catalog listing, so match the old part rather than guessing.
The J30 never sold in huge numbers, and its pearl-shaped doors are easy to forget. Underneath, its front bearings belong to an older school of service work.
The front assembly and its seal
This covers the front bearing assembly on every 1993-1997 J30.
It is a serviceable design, adjusted and repacked rather than pressed out as a cartridge.
Infiniti J30 wheel bearing part numbers
| Years | Detail | Number |
|---|---|---|
| 1993-1997 | Front bearing assembly, serviceable | JRM3449-90UA1 check price |
| 1993-1997 | Front bearing seal | 710292 check price |
Every model year this chart resolves: 1993, 1994, 1995, 1996 and 1997.
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 rear bearing holds no dedicated catalog listing under the J30 name.
Match the old part when you replace it, rather than guessing at a number that was never assigned.
A shared front end with the Q45
The 1997-2001 Infiniti Q45 used the same front bearing assembly as the J30. That overlap is what keeps JRM3449-90UA1 in stock decades later.
Search a J30 wheel bearing today and Q45 listings often turn up first. The flagship sedan outlasted the J30 in the Infiniti lineup by four more model years.
Old-school service, not a swap
A J30 wheel bearing job looks more like a repack than a parts swap. The assembly gets cleaned, packed with fresh grease, and set with a proper adjustment.
Skipping that adjustment step is the fastest way to cook a good bearing early. That failure shows up long before tire wear would explain the noise.
Diagnosing a J30 wheel bearing
- Listen for a rolling drone. A failing J30 wheel bearing produces a low hum that rises with road speed.
- Rock the wheel by hand. Play at nine and three o’clock signals a loose or worn front assembly. See how to check a wheel bearing for the steps.
- Check grease condition first. On a car this old, dried or contaminated grease is often the real problem.
- Feel for heat at the hub. A hot hub after a short drive points to a bearing running dry or set too tight.
- Confirm the adjustment before condemning the part. A misadjusted assembly can mimic wear that a proper repack and reset will fix.
Common questions
What is the J30 front wheel bearing part number?
JRM3449-90UA1, with seal 710292. It covers the full 1993-1997 model run.
Is the J30 wheel bearing sealed or serviceable?
Serviceable. The front assembly is meant to be cleaned, repacked, and adjusted, not replaced as a sealed unit.
Does a J30 front bearing assembly fit the Q45?
Yes. The 1997-2001 Q45 used the same JRM3449-90UA1 assembly up front.
Is there a J30 rear wheel bearing part number?
No dedicated listing exists under the J30 name. Match the old part when you order a replacement.
Why does a J30 wheel bearing need adjustment after service?
It is a serviceable design, not a cartridge. Setting the preload correctly is what keeps the repacked bearing from running loose or too tight.