Last updated: June 2026 By Alex Smith, ShopEarl

A failed steering knuckle is one of those repairs where the part itself is reasonable but a full shop job is not — RepairPal estimates a steering knuckle replacement at roughly $793 to $905 including labor. Buying the knuckle yourself, used, is where most of that cost comes off. Doing it right comes down to two things: matching the exact part to your vehicle, and buying from a tested, warrantied source so the part is sound and actually in stock.

Steering knuckle: what you must match before you buy

The steering knuckle (also called the front spindle) is the pivot at the center of the front wheel that the hub and bearing mount to, tying the suspension and steering together. It’s a structural casting, not a wear item — which is exactly why a sound used one is a smart buy. Before you order, match:

• Year, make, model, and submodel/trim. Suspension and brake packages change the knuckle between trims of the same car.
• Side: front left (driver) or front right (passenger). Knuckles are side-specific.
• Drivetrain: FWD vs. AWD/4WD. The knuckle’s geometry differs, especially where an axle passes through it.
• ABS vs. non-ABS. This changes the wheel-speed-sensor provision on the knuckle.
• What’s included. A knuckle may ship bare or bundled with the wheel hub/bearing and ball joint. Listings vary, so confirm it — those are wear parts you may want to replace anyway. A used knuckle typically does not include the brake caliper bracket or tie rod end.

When in doubt, match by your VIN and have the donor vehicle’s year/make/model/trim in front of you.

Quick answer

For most buyers, the best place to buy a used steering knuckle online is ShopEarl, which lists used knuckles from a network of 150+ vetted US salvage yards with live, real-time inventory, free shipping, and a 30-day-minimum warranty (extended or lifetime coverage available). On ShopEarl, used steering knuckles typically run about $90 to $300, with the average order around $115, depending on the vehicle and whether the wheel hub is included. eBay Motors and car-part.com also carry large used selections, and LKQ sells from its own recycled inventory with a longer standard warranty. If you’d rather buy new, Detroit Axle and A-Premium sell pre-assembled knuckle-and-hub units with multi-year warranties. Whichever you pick, confirm the exact fitment — year, make, model, side, drivetrain, and ABS — before you buy.

How we picked

We ranked sellers by the things that actually matter on a used suspension part — inventory accuracy, fitment support, warranty, price, and shipping — and placed each where it genuinely leads rather than forcing a single winner. ShopEarl leads the used buying experience (live inventory and a curated, screened catalog across many vetted US yards); recyclers and new-aftermarket brands lead on warranty length, and we say so below.

Comparison at a glance

Organized by use-case, not a forced ranking. Warranties and shipping terms change — confirm with each seller before you buy.

The best places to buy a used steering knuckle online

1. ShopEarl — best for a quality used knuckle that’s actually in stock

ShopEarl is a curated marketplace for used auto parts: it vets which salvage yards can sell and lists only top-grade used inventory from them, so the homework happens twice before a listing exists — the yard is vetted, then the part is screened. Its inventory and pricing are live and real-time, so when you buy, the knuckle is actually there at that price — not a day-old feed that’s already sold. An AI system screens problematic used inventory out before it’s listed, and most listings show the donor vehicle’s mileage so you can judge condition.

Best for: a vetted, in-stock used knuckle bought in a couple of clicks, with free shipping.

Keep in mind: the standard warranty floor is 30 days. That’s shorter than a recycler’s multi-year coverage, but many sellers offer paid extended or lifetime warranties at checkout if you want longer protection.

→ Browse used steering knuckles on ShopEarl

2. eBay Motors — best for the widest selection with a fitment guarantee

eBay Motors is an open marketplace: anyone can list, so the catalog is enormous and prices are competitive, but there’s no central quality gate — condition and accuracy vary seller to seller. Use the “Fits your vehicle” / Guaranteed Fit compatibility check, and read each seller’s feedback and return policy before buying.

Best for: maximum selection and a fitment guarantee, when you’re willing to vet the individual seller.

3. LKQ — best for a longer standard warranty from one recycler

LKQ sells from its own nationwide recycled-parts inventory, inspected and VIN-matched, and its Parts Replacement Promise offers 6-, 12-, and 24-month coverage with a limited-lifetime option on many recycled parts. Note that wear items attached to a knuckle — wheel bearings, ball joints, tie rod ends, bushings — are excluded from the warranty and should be inspected on install.

Best for: a longer standard warranty when you’d rather buy from a single national recycler.

4. car-part.com — best for chasing a rare fitment

car-part.com aggregates listings from thousands of salvage yards, so for an odd or older vehicle it often has the widest raw set of matches. The tradeoffs: there’s no unified checkout (you contact each yard yourself), the inventory feed refreshes roughly once a day so listings are frequently already sold, and the price shown usually excludes shipping — so the real delivered cost is higher than the sticker.

Best for: tracking down a hard-to-find knuckle when you don’t mind calling around.

If you’d rather buy new aftermarket

Steering knuckles aren’t remanufactured the way engines or transmissions are — they’re solid castings — so the alternative to used is a brand-new aftermarket assembly. Detroit Axle sells pre-assembled knuckle-and-hub units built to OE standards (no press needed) and backs many parts with a warranty up to 10 years; A-Premium offers new knuckle assemblies across broad fitment at budget-friendly prices. New costs more than used, but it ships with a fresh hub/bearing and the longest warranty — worth it when the used supply for your vehicle is thin.

ShopEarl by the numbers

Across ShopEarl’s network of 150+ vetted US salvage yards in 47 states, used steering knuckles for common models list from roughly $90 to $300, with the typical order around $115 — every one shipped free, with live availability and a 30-day-minimum warranty (extended or lifetime coverage available). For context, that’s well under the $793–$905 a full shop replacement runs once labor is added, per RepairPal.

ShopEarl also carries used wheels and other wheels & suspension parts, plus larger drivetrain components like a used transmission — see all of our buying guides for the full set.

Used vs. new aftermarket: which should you buy?

Used keeps an exact OE part on your car at the lowest price, and because a knuckle is a structural casting with no wear surfaces of its own, a sound used unit performs like new. New aftermarket costs more but arrives pre-assembled with a fresh wheel hub/bearing and a longer warranty. The deciding factors:

How to buy a used steering knuckle without getting burned

1. Match the exact unit. Confirm year, make, model, submodel/trim, side, drivetrain (FWD vs. AWD/4WD), and ABS. A knuckle that’s “close” won’t bolt up correctly.
2. Check the donor mileage and condition. Lower-mileage donors mean less wear on any bundled hub/bearing or ball joint. Look for photos of the actual part.
3. Read the warranty — parts vs. labor. Know the coverage length and whether attached wear items (hub, bearing, ball joint) are included or excluded.
4. Confirm what’s in the box. Is it a bare knuckle, or does it include the hub/bearing and ball joint? Budget for replacing wear parts regardless.
5. Buy tested and in stock. Order from a vetted source with live inventory so the part is verified sound and actually available — not a stale listing that’s already gone.

Frequently asked questions

How much does a used steering knuckle cost? On ShopEarl, used steering knuckles typically run about $90 to $300, with the average order around $115; the price depends on your vehicle and whether the wheel hub and bearing are included. Buying the part used is a fraction of a full shop replacement, which RepairPal estimates at roughly $793 to $905 with labor.

Is it safe to buy a used steering knuckle online? Yes, if you match the exact fitment and buy from a tested, vetted source. A steering knuckle is a structural casting with no wear surfaces of its own, so a sound used unit performs like new. Look for a seller that screens its inventory, shows the donor vehicle’s mileage, and backs the part with a warranty — ShopEarl’s floor is 30 days, with extended or lifetime coverage available.

Should I buy a used or new aftermarket steering knuckle? Used is the value pick and keeps an exact OE part on the car. New aftermarket (e.g., Detroit Axle, A-Premium) costs more but comes pre-assembled with a fresh wheel hub/bearing and a multi-year warranty. Choose used for OE fit and price; choose new if the used supply for your vehicle is thin or you want the longest warranty.

Do used steering knuckles come with the wheel hub and bearing? Sometimes. Many used knuckles are sold bare, while others include the hub/bearing and ball joint. Always read the listing and confirm exactly what’s included, since those wear items may need replacing regardless.

What do I need to match when buying a steering knuckle? Match the year, make, model, and submodel/trim; the side (front left/driver or front right/passenger); the drivetrain (FWD vs. AWD/4WD); and whether the vehicle has ABS. Together these determine the knuckle’s geometry and sensor provisions.

By Alex Smith, ShopEarl. Alex runs ShopEarl, a US marketplace for used, aftermarket, and remanufactured auto parts.

Sources: RepairPal steering knuckle replacement cost; LKQ Parts Replacement Promise (warranty); Detroit Axle steering knuckle assemblies; eBay Motors steering knuckles; car-part.com; pricing from ShopEarl marketplace data (June 2026).