What an inner tie rod does and why it fails

An inner tie rod is the part of your steering linkage that connects the steering rack (the component that turns your wheels when you turn the steering wheel) to the outer tie rod, which then connects to your wheel hub. When you turn the wheel, hydraulic pressure or electric motors move the rack, and the tie rods transfer that motion to angle your wheels left or right.

Inner tie rods wear out because they live inside a rubber boot that can crack or tear. Once moisture and road salt get inside, the ball joint corrodes and the connection becomes loose. A worn inner tie rod causes play in the steering — you might notice the wheel doesn't respond when ready when you turn, or the steering wheel feels loose. Some vehicles also develop a clunking sound from the front end when turning or hitting bumps.

Replacement is necessary because a completely failed inner tie rod can cause sudden loss of steering control. Unlike an outer tie rod, which you can sometimes replace without special tools, an inner tie rod usually requires removing the steering rack from the vehicle or at minimum unbolting the rack from its mounts to access the connection point.

Key Takeaways

  • Inner tie rods connect the steering rack to the outer tie rod and fail when their protective boots tear, allowing corrosion of the ball joint inside.
  • Replacement typically requires removing or unbolting the steering rack, which means this job is more involved than replacing an outer tie rod.
  • You will need a tie rod removal tool (a puller) to separate the ball joint from the steering arm, and a wrench to remove the lock nut holding the tie rod to the rack.
  • After replacement, your vehicle must be realigned because moving the tie rod changes the toe angle of your wheels.
  • Labor costs vary widely by vehicle make and model; some racks are accessible from above, while others require removing the subframe.

Tools and parts you will need

Before you start, gather the correct replacement inner tie rod for your vehicle. Tie rods are not universal — they vary by steering rack design, thread pitch, and length. Order the part using your vehicle's year, make, model, and engine size. Many shops sell inner tie rods as an assembly (the rod, ball joint, and boot all together) rather than individual components.

Essential tools include a tie rod removal tool (also called a tie rod puller or ball joint separator), an adjustable wrench or socket set to fit your vehicle's lock nut, a jack and jack stands, and a way to remove the wheel (a lug wrench or impact wrench). You will also need a container to catch any fluid that drains from the steering rack when you disconnect the tie rod.

Optional but helpful: a breaker bar for stubborn fasteners, penetrating oil (like PB Blaster or Kroil) to spray on corroded connections the night before, and a torque wrench to tighten the new tie rod to the manufacturer's specification. If you are replacing both inner tie rods (which is common because if one has failed, the other is usually close behind), buy two assemblies.

Steps to remove the old inner tie rod

Raise the vehicle on a jack and support it with jack stands under the frame, never under the suspension. Remove the wheel on the side you are working on. Locate the inner tie rod where it connects to the steering rack — it will be bolted or threaded onto the rack itself, usually near the center of the vehicle under the engine.

Spray penetrating oil on the connection between the inner tie rod and the steering rack, and on the lock nut that holds it in place. Let it soak for 15 to 30 minutes. While you wait, locate where the outer tie rod connects to the steering arm (the part bolted to your wheel hub). You may need to remove the outer tie rod first to access the inner tie rod, depending on your vehicle's design.

Use the tie rod removal tool to separate the ball joint from the steering arm. Position the tool's jaws around the ball joint stud and tighten the center bolt until the joint pops free. Do not strike the steering arm with a hammer — this can damage the arm or the wheel bearing.

Once the outer tie rod is free, use your wrench to hold the inner tie rod steady while you unscrew the lock nut on the steering rack. Count how many full turns it takes to remove the old tie rod, or mark the position with tape — this helps you thread the new one to approximately the same length, which keeps your toe angle closer to correct.

Installing the new inner tie rod

Thread the new inner tie rod onto the steering rack by hand first, then use your wrench to tighten it. Tighten it to the same number of turns you counted during removal, or until it reaches the mark you made. Do not over-tighten — you are aiming for snug, not maximum force. If your vehicle's manual specifies a torque value for the tie rod, use a torque wrench to hit that number.

Reconnect the outer tie rod to the steering arm using the ball joint stud. Insert the stud through the hole in the steering arm and thread the castle nut (the nut with slots cut into it) by hand. Tighten it until snug, then tighten further only enough to align one of the slots with the hole in the stud — you will insert a cotter pin through the slot and stud to lock it. If the nut does not align with a slot at the correct tightness, tighten it a bit more and check again. Do not loosen it to make the slot line up.

Insert the cotter pin and bend both ends up to lock it in place. Reinstall the wheel and lower the vehicle. Repeat the process on the other side if you are replacing both inner tie rods.

Why alignment is necessary after replacement

The inner tie rod controls how far forward or backward the wheel sits relative to the centerline of the vehicle — this is called toe. When you remove and reinstall a tie rod, even if you thread it back to the same position, small variations in how tight you made it or where the threads sit can shift the toe angle by a quarter inch or more.

Incorrect toe causes uneven tire wear (the inside or outside edge of the tire wears faster than the center), pulls the steering wheel to one side, and reduces fuel economy. A four-wheel alignment machine measures the toe angle on all four wheels and adjusts the tie rods until the angles fall within the manufacturer's range. This usually costs between $100 and $200 depending on your location and whether the shop charges for a two-wheel or four-wheel alignment.

Some shops will perform a "toe-only" alignment if you are only replacing a tie rod, which is cheaper than a full alignment. Ask whether this is available for your vehicle.

Common problems and how to avoid them

The most frequent issue is a tie rod that is too tight or too loose on the steering rack. If you over-tighten it, you can strip the threads on the rack itself, which is expensive to repair. If you under-tighten it, the tie rod can unscrew while you are driving. Tighten until snug and the rod does not move by hand, then stop. If your manual gives a torque spec, use it.

Another common mistake is forgetting to reinstall the cotter pin on the outer tie rod's castle nut. The cotter pin is the only thing keeping that nut from vibrating loose. If you drive without it, the nut can back off and the tie rod can separate from the steering arm, causing complete loss of steering on that wheel.

On some vehicles, the steering rack is difficult to access without removing the subframe or engine cradle. If you find that you cannot reach the inner tie rod after removing the wheel and splash guard, stop and consult your vehicle's service manual or a shop. Forcing access can break plastic components or damage the suspension.

When to call a shop instead

If the lock nut on the steering rack is severely corroded and will not budge even after soaking with penetrating oil, a shop has access to heat guns and specialized tools that can free it without damaging the rack. If your vehicle requires subframe removal to access the tie rod, the labor time jumps significantly and the risk of making a mistake increases — this is a good time to let a professional handle it.

If you do not have a tie rod removal tool, you can rent one from most auto parts stores for $20 to $40, or borrow one from a friend. However, if you are uncomfortable working under a raised vehicle or do not have a safe place to work, a shop is the safer choice. Labor costs for inner tie rod replacement typically range from $150 to $400 depending on how accessible the steering rack is on your vehicle.

Frequently Asked Questions

Can I replace just one inner tie rod, or do I need to replace both?

You can replace just one, but if one has failed, the other is usually close behind because they wear at the same rate. Many shops recommend replacing both at the same time to avoid a second trip under the vehicle in a few months. If you replace only one, the other side may need replacement within the next year or two.

How do I know if my inner tie rod is actually bad and not just the outer one?

A bad outer tie rod usually causes a clunking sound when turning and visible play in the wheel when you grab it and try to move it side to side. A bad inner tie rod causes looseness in the steering wheel itself — you turn the wheel but it takes a moment for the wheels to respond, or the steering wheel feels vague. A shop can confirm by putting the vehicle on a lift and checking for movement at both the inner and outer connections.

Do I need to bleed the steering system after replacing an inner tie rod?

Most vehicles do not require bleeding after tie rod replacement because you are not opening the hydraulic lines — you are only disconnecting the rod from the rack. However, if your vehicle has a power steering system and fluid drains out during removal, you may need to refill the reservoir and check for leaks. Consult your manual to confirm.

What if the new tie rod is a different length than the old one?

This sometimes happens with aftermarket parts or if you order the wrong part number. Do not install it — return it and order the correct one. Installing a tie rod of the wrong length will put your toe angle so far out of spec that the alignment shop may not be able to correct it, and it can cause handling problems.

How long does it take to replace an inner tie rod?

If the steering rack is easily accessible, the job typically takes one to two hours for a single tie rod, or two to three hours for both. If the subframe must be removed, add another two to four hours. A shop can usually complete it in one day.