Should I replace all 4 struts?
In most cases, you don’t need to replace all four at once; replacing struts in pairs on each axle is common practice, but replacing all four may be wise if several struts show wear or you want balanced damping for the long term.
Struts are a central part of the suspension that affect ride comfort, handling, and safety. This article explains when to replace them, whether to replace all four at once, and what factors influence cost and decisions.
What do struts do and how do they wear?
Struts are a key component of many vehicle suspensions, combining a shock absorber with a coil spring. They dampen road impacts, help maintain tire contact with the road, and support the vehicle’s ride height. Over time, hydraulic fluid can leak, seals wear, and the internal piston or spring can lose stiffness, leading to degraded ride quality and handling.
Key signs of worn struts
Watch for the following indicators that a strut may be failing or nearing the end of its useful life. If you notice several of these, a suspension inspection is warranted.
- Leaking fluid around the strut body
- Excessive bouncing or a floaty ride after hitting bumps
- Increased body roll or nose-diving during braking
- Uneven or accelerated tire wear on one corner
- Clunks, knocking noises, or NVH (noise, vibration, harshness) when going over irregular surfaces
- Steering feel that wanders or becomes less precise
If you observe these signs, have a qualified technician inspect your suspension and confirm whether replacement is needed. Early attention can prevent further wear on other components.
Should you replace all four struts? Replacement strategies
Replacement decisions depend on wear patterns, budget, and how you use the vehicle. The following guidance reflects common automotive practices and what to consider when planning service.
- Replace only the struts that show visible failure or leakage, if the others are still performing well.
- Replace struts in pairs on the same axle (left and right) to maintain balanced damping and avoid uneven handling.
- Consider replacing all four if multiple struts are near end of life or if you want uniform ride quality and predictable handling for the long term.
- Inspect and, if needed, replace related components such as strut mounts, bearings, bump stops, and, in some cases, springs to prevent future issues.
- After installation, have the vehicle’s wheel alignment checked and corrected if necessary to ensure proper tire wear and steering response.
- For vehicles with complex suspension setups, or if you’re unsure about part compatibility, consult a shop for a full assessment and a written plan.
Bottom line: replacing in pairs is a prudent middle ground, while replacing all four is advisable if wear is widespread or you’re seeking consistent performance and confidence across all corners.
Cost, timing, and what to ask your shop
Costs vary by vehicle type, region, and the choice of parts. Here are the main factors to consider and questions to ask when budgeting for strut replacement.
- Parts cost: aftermarket or OEM struts typically range from roughly $100 to $350 per strut, depending on the vehicle and brand.
- Labor: installation and any required alignment can add several hundred dollars per axle; replacing all four struts is usually priced as two axles.
- Related parts: you may need to replace mounts, bump stops, bearings, or springs, which adds to both parts and labor costs.
- Alignment and warranty: insist on a wheel alignment after installation and ask about parts and labor warranties.
- Quotes: obtain a detailed, itemized quote that separates parts, labor, alignment, and any additional services.
Conclusion: plan for a comprehensive assessment, ask for a written plan with options (two-strut vs four-strut replacement), and confirm what is covered by warranty.
What to do next
If you’re facing suspension issues, schedule a diagnostic with a reputable shop. Bring a summary of symptoms, your mileage, and recent driving conditions. For DIY enthusiasts, ensure you have the proper tools and safety precautions; many strut replacements require tooling for spring loads. When in doubt, consult a professional to avoid compromising ride safety or vehicle alignment.
Summary
Most vehicles don’t require replacing all four struts at once. Replacing struts in pairs on the same axle is common practice to maintain balanced handling, while replacing all four is sensible if multiple units are worn or you want uniform performance and longer-term reliability. Always inspect for leaks and excessive wear, factor in related components and alignment, and obtain a clear, itemized quote before proceeding.
