Front Left Steering Knuckle & Hub Bearing Assembly for 2012 Honda Civic 1.5L & 1.8L

A Front Left Steering Knuckle and Hub Bearing Assembly for the Civic

This is a front left (driver's side) steering knuckle and wheel bearing hub assembly built for the 2012 Honda Civic with either the 1.5L or 1.8L engine, cross-referenced to OE number 51216-TR3-Y00. If you're hearing a humming or grinding noise from the front left wheel that gets louder with speed, feeling a vibration through the steering wheel, or noticing the front end pull slightly to one side under braking, a worn front left steering knuckle and hub bearing is a common cause on this generation of Civic.

Why the Knuckle and Hub Bearing Are Sold as One Assembly

The steering knuckle is the cast metal part that connects the wheel hub, brake caliper, and suspension components together at each corner of the car, and on the Civic the wheel bearing is pressed into the knuckle itself rather than being a separate serviceable part. Because the two components are permanently mated at the factory, replacing a worn bearing means replacing the complete knuckle and hub assembly rather than pressing a new bearing into the old knuckle, which is why this part ships pre-assembled and ready to bolt in without special tools or a hydraulic press.

Key Features

• Cross-referenced to OE number 51216-TR3-Y00
• Innovative bolt-on, pre-assembled design that eliminates the need for a press
• Engineered with high-quality materials for long service life
• Backed by a 2-year warranty

Specifications

• Type: Steering knuckle and wheel bearing hub assembly
• Position: Front left (driver's side)
• Quantity: 1 piece
• Fitment type: Direct replacement
• Condition: New

Compatibility

Fits the 2012 Honda Civic with either the 1.5L or 1.8L four-cylinder engine, front left position only. Because the Civic's right side uses a different knuckle casting, it's worth double-checking that you need the left (driver's) side specifically before ordering, or contacting us if you're unsure which side has failed.

Signs Your Steering Knuckle and Hub Bearing Need Replacing

A failing front hub bearing on the Civic typically announces itself with a humming, growling, or grinding noise from the affected wheel that gets louder as speed increases and may change pitch when turning, a vibration felt through the steering wheel or floor, or play in the wheel when checked by hand with the car raised. Because the knuckle also anchors the lower ball joint and, on many trims, the ABS wheel speed sensor, a knuckle that's cracked or corroded around these mounting points can also affect steering feel and trigger ABS warning lights even when the bearing itself still feels tight.

Why Replace the Complete Assembly Rather Than Just the Bearing

Since the bearing is pressed into the knuckle at the factory and not designed to be serviced separately in the field, starting with a new, pre-assembled unit means the bearing, seals, and knuckle casting are all fresh at once. This avoids the risk of introducing play or misalignment that can come from attempting to press a new bearing into a knuckle bore that's already seen wear, and it removes the need for the specialized press equipment that a bearing-only repair would otherwise require.

Installation Notes

Replacing this assembly means removing the wheel, disconnecting the brake caliper and rotor, disconnecting the tie rod end and lower ball joint from the knuckle, removing the driveshaft axle nut, and separating the knuckle from the strut before installing the new assembly in reverse order. Because the axle nut is typically torqued well beyond what most hand tools can manage, doing the final torque with the vehicle's weight on its wheels rather than up on a jack is worth planning for ahead of time, and a new axle nut is generally recommended any time the old one is removed.

Ordering Information

This steering knuckle and hub bearing assembly is in stock and ships ready to install. Our Shipping Information page covers current timelines, and our Warranty and Returns pages explain what to do if anything isn't right on arrival. Not sure this is the side or engine you need? Our Request a Part page is the fastest way to confirm before you order.

Related Parts

This steering knuckle and hub bearing assembly is listed in our Honda collection, along with our Steering collection, where you'll find other steering and suspension components for the Civic.