2011-2012 Mitsubishi Galant Rear Coil Spring: Fixing Sag, Noise, and Ride Height Issues
This guide covers the common failure symptoms, replacement costs, and what to look for when buying a used rear coil spring for your 2011-2012 Mitsubishi Galant.
- This part is the REAR coil spring, OEM part number 4140A322, which fits the left or right side of all 2011-2012 Galant models.
- The most common symptoms of failure are a sagging rear end, clunking noises over bumps, and uneven tire wear.
- Always replace rear coil springs in pairs to maintain even ride height and safe handling. A wheel alignment is required after replacement.
- There are no recalls or common TSBs for this part; failures are typically due to age and corrosion.
Symptoms of a Failing Rear Coil Spring
Coil springs are simple but durable parts that wear out from metal fatigue over many years and miles. Failure is often gradual, but can sometimes happen suddenly if a spring cracks. Here are the most common signs that your 2011-2012 Galant's rear coil springs are worn or broken:
- Sagging Rear End: The most obvious symptom is a noticeable drop in ride height at the back of the car. You might see that one rear corner is lower than the other, or that the entire rear end sits lower than it used to, reducing the gap between the tire and the fender.
- Clunking or Popping Noises: A metallic clunking, popping, or creaking sound from the rear of the car, especially when going over bumps, speed bumps, or turning into a driveway, often points to a broken or shifting coil spring. A broken piece of the coil can move around in its seat, creating noise.
- Bouncy or Harsh Ride: While shocks control the bouncing motion, weak springs can't properly support the car's weight, leading to excessive bouncing after hitting a bump or a feeling that the suspension is bottoming out with a harsh bang.
- Poor Handling and Instability: Worn springs can make the car feel less stable, especially during turns or on uneven roads. The rear of the car may sway more, and steering can feel less precise because the suspension geometry is incorrect.
- Uneven Tire Wear: Sagging springs alter the wheel alignment angles (camber and toe). This change forces the tires to wear unevenly, often on the inside edge, which can ruin a good set of tires quickly.
Known Issues, TSBs, and Recalls
As of mid-2026, there are no active safety recalls from the National Highway Traffic Safety Administration (NHTSA) for the suspension or coil springs on the 2011-2012 Mitsubishi Galant. Likewise, there are no widespread Technical Service Bulletins (TSBs) from Mitsubishi pointing to a common defect with the rear coil springs on these models. Failures are typically due to normal wear and tear from age, mileage, and environmental factors like road salt causing corrosion.
Pro Tip: Some owners may mistake a rattling noise from a loose exhaust heat shield for a suspension problem. If you hear a metallic rattle, it's worth checking the heat shields above the exhaust system before assuming a spring has failed.
Buying a Used 2011-2012 Galant Coil Spring
A used OEM coil spring can be a smart, cost-effective choice, as factory springs are designed for the exact weight and handling characteristics of your Galant. Aftermarket springs can sometimes alter ride height or firmness. Here’s what to check before buying used:
- Always Buy in Pairs: This is the most important rule. Springs should always be replaced in pairs (both rear springs at the same time) to ensure the car sits level and handles predictably. A new spring on one side and an old, sagging spring on the other will create an imbalance. Ideally, source both springs from the same donor vehicle.
- Visual Inspection for Cracks: Carefully inspect the entire spring, paying close attention to the top and bottom coils where they sit in the suspension mounts. Look for any cracks, which are an immediate deal-breaker. A cracked spring is unsafe and has already failed.
- Check for Severe Rust or Pitting: Surface rust is normal, but deep, flaky rust or pitting weakens the metal and makes it prone to breaking. Pay special attention to the bottom coil, as this area often traps moisture and dirt, accelerating corrosion.
- Measure the Free Height: If possible, ask the seller for the free height (the length of the spring when it's not compressed). Compare this measurement between the two used springs you are buying. They should be nearly identical. A significant difference indicates one is more fatigued than the other.
- Avoid Heated or Cut Springs: Look for discoloration (blue or rainbow marks) which indicates the spring was heated with a torch, likely to lower the vehicle. This ruins the spring's temper and makes it unsafe. Also, ensure the ends of the spring are flat and tapered from the factory, not cut with a grinder.
Replacement Overview & Difficulty
Replacing the rear coil springs on a 2011-2012 Galant is a moderately difficult job for a DIY mechanic with the right tools and safety knowledge.
- Difficulty Rating: 3 out of 5
- Estimated Time: 1.5 - 2.5 hours for the pair.
- Key Steps: The process generally involves safely lifting and supporting the rear of the vehicle, removing the wheel, unbolting the lower shock absorber mount, and carefully lowering the control arm to decompress and remove the old spring. The new spring is then installed, and the components are reassembled.
Warning: While these rear springs are separate from the shock and under less tension than a front MacPherson strut assembly, they still store energy. You must properly support the vehicle on jack stands and control the downward movement of the suspension to avoid injury. Never work under a vehicle supported only by a jack.
Cost Comparison (For a Pair of Rear Springs)
Replacing springs in pairs is essential. The following table estimates the cost for replacing both rear coil springs.
| Part Type | Estimated Cost (Parts Only) |
|---|---|
| New OEM | $100 - $140 |
| New Aftermarket | $50 - $90 |
| Used OEM | $40 - $75 |
| Shop Labor | $200 - $400 |
Technical Specifications
- Part: Rear Suspension Coil Spring
- Fitment: Left or Right Side
- Vehicle Fitment: 2011-2012 Mitsubishi Galant (ES, FE, SE trims with 2.4L engine)
- OEM Part Numbers: 4140A322, MU4140A322
Frequently Asked Questions (FAQ)
Do I need a wheel alignment after replacing rear coil springs?
Yes, it is highly recommended. Replacing the springs changes the vehicle's ride height, which directly affects the rear wheel alignment angles (camber and toe). Driving without an alignment can cause poor handling and rapid, uneven tire wear.
Can I replace just one broken coil spring?
No, you should never replace just one spring on an axle. Springs wear out and sag over time, so replacing only one will result in an uneven ride height, causing the vehicle to lean to one side and handle poorly. Always replace them in pairs (both rears or both fronts).
Is it safe to drive with a broken coil spring?
It is not recommended. A broken spring can cause a loss of control, especially during turns or emergency maneuvers. In a worst-case scenario, the broken piece of the spring could shift and puncture your tire or damage other suspension components. The car should be repaired as soon as possible.
What's the difference between a coil spring and a strut?
A coil spring is the component that supports the vehicle's weight. A strut is a type of shock absorber that is also a structural part of the suspension, with the coil spring typically mounted around it. For the rear of the 2011-2012 Galant, the coil spring and the shock absorber are separate components, not a combined strut assembly.
Technical Specifications
OEM Part Numbers: 4140A322 MU4140A322
Position: Rear, Left or Right
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Mitsubishi Galant: