Part 54507M: Nissan Altima 2005 2.5 Suspension Part Guide

If you own a 2005 Nissan Altima with the 2.5-liter engine and need a suspension component, you may have come across the part number 54507M. This article explains exactly what that part is, which vehicles it fits, common signs of failure, and how to approach replacement. Whether you are a DIY mechanic or working with a shop, understanding part 54507M can save you time and money.

What Is Part 54507M?

Part 54507M is an original equipment (OE) suspension component for the 2005 Nissan Altima 2.5L. Specifically, it is the front lower control arm – sometimes called the front lower arm or front suspension arm. The control arm connects the wheel hub and steering knuckle to the vehicle's frame, allowing the wheel to move up and down while maintaining proper alignment. It includes a ball joint at the outer end and two bushings at the inner mounting points. The "M" suffix often indicates a specific revision or left/right side, but 54507M is typically used for the driver's side (left) front control arm.

This part is made of stamped steel with pressed-in bushings and a non-serviceable ball joint. It is designed to be replaced as an assembly. Using an OE-grade part ensures correct geometry, proper material strength, and long service life.

Compatibility: Which Vehicles Use 54507M?

Part 54507M is engineered specifically for the 2005 Nissan Altima with the 2.5L QR25DE four-cylinder engine. It also fits other model years and trims, but always double-check.

• 2005 Nissan Altima 2.5 S (base trim) – direct fit
• 2005 Nissan Altima 2.5 SL – direct fit
• Some earlier Altimas (2002-2004) with the 2.5L may also use the same control arm, but the part number could differ. Verify using your VIN or existing part.

It does not fit Altimas with the 3.5L V6 (SE-R or 3.5 SL) – those use different control arms. Also, CVT or manual transmission does not affect the suspension part.

Important: Part 54507M is the left front control arm. The right front passenger side has a separate number (often 54506M or similar). Always confirm you are ordering the correct side.

Symptoms of a Failing Front Control Arm

Over time, the bushings and ball joint in the control arm wear out. Common symptoms include:

• Clunking or knocking noise from the front suspension when driving over bumps or turning.
• Steering wheel vibration or play at highway speeds.
• Uneven tire wear, especially on the inner or outer edges.
• Vehicle pulls to one side during braking or acceleration.
• Loose or vague steering feel.

If you notice any of these, inspect the control arm and its ball joint. A worn ball joint will have excessive play, which can be dangerous if it separates.

Replacement Tips for Part 54507M

Replacing the front control arm is a moderate DIY job if you have basic tools and mechanical experience. Here are key points:

1. Safety first: Support the vehicle securely on jack stands. Never rely on a jack alone.
2. Tools needed: Socket set, torque wrench, ball joint separator (pickle fork or press), breaker bar, and penetrating oil.
3. Steps:
   • Remove the wheel.
   • Unbolt the sway bar link if in the way.
   • Separate the ball joint from the steering knuckle using a separator tool.
   • Remove the two bolts at the inner frame mounting points.
   • Remove the old control arm and install the new one, using new hardware if provided.
   • Torque all bolts to manufacturer specifications (typically around 80-100 ft-lbs for the inner bolts, and 40-50 ft-lbs for the ball joint nut).
4. Alignment required: After replacement, the front end alignment must be checked and adjusted. Even small position changes affect toe and camber.
5. Consider replacing both sides: If one control arm is worn, the other side is likely close to failure. Replacing both at once ensures even handling performance.

Where to Buy Part 54507M

You can purchase this part from auto parts stores, online retailers, or a Nissan dealership. Common brands that produce OE-quality replacements include MOOG, ACDelco, Dorman, and TRW. Genuine Nissan parts are also available but often more expensive. When comparing options:

• Look for a direct fit or OE replacement design.
• Check whether the ball joint and bushings are pre-installed – most come as a complete unit.
• Read product descriptions carefully: some aftermarket arms include upgraded bushings for longer life.
• Avoid the cheapest options as they may use inferior steel or poor ball joint seals.

Note: Do not confuse part 54507M with other similar numbers like 54506M (right side) or 54500M (which might be a different component). Always verify using your vehicle's VIN or by inspecting the old part.

Final Recommendation

If your 2005 Nissan Altima 2.5 needs a new front left control arm, part 54507M is the correct OE replacement. For most owners, a high-quality aftermarket arm from MOOG or similar will perform as well as the factory part at a lower price. Replace it promptly if you notice clunking or steering issues, and always get a wheel alignment after installation. If you are not comfortable with suspension work, have a professional mechanic do the job – it's a safety-critical system.