A Professional Guide to 2020-2025 Mazda 3 Front Suspension Struts
Restore your Mazda 3's sharp handling and smooth ride by choosing the right replacement struts.
- Always replace struts in pairs to maintain vehicle stability and safety.
- A wheel alignment is mandatory after strut replacement to prevent tire wear and handling issues.
- For an OEM-like ride, KYB is the recommended aftermarket brand; FCS is a budget-friendly alternative.
- A clunking noise may be caused by a TSB for subframe bolts, not just a bad strut; proper diagnosis is key.
Is It Time for New Struts on Your Mazda 3?
The struts on your Mazda 3 are wear-and-tear items, typically lasting between 50,000 and 100,000 miles. However, driving on rough roads can shorten their lifespan. When struts wear out, the car's ability to handle and brake safely is reduced. You'll likely notice a change in how your car feels. 🎬 Watch: 5 symptoms of bad struts you should not ignore Paying attention to these signs can help you decide when it's time for a replacement.
Common Symptoms of Failing Struts:
- Bouncy or Floating Ride: The car feels unstable and continues to bounce after hitting bumps.
- Nose-Diving When Braking: The front of the car dips down excessively when you apply the brakes.
- Clunking or Rattling Noises: You hear noises from the front suspension when going over bumps. This could be the strut, but it's important to rule out other issues.
- Uneven Tire Wear: Worn struts can cause scalloped dips, known as 'cupping,' on your tires.
- Visible Fluid Leaks: Oil leaking down the side of the strut body is a clear sign of failure.
A Note on Suspension Noises
A clunking or rattling noise from the front end doesn't always mean your struts are bad. Mazda has issued a Technical Service Bulletin (TSB SA-057-22 / 02-003/24) for a rattle noise on 2019-2022 models caused by rusting front subframe bolts. 🎬 See how to fix this common Mazda 3 suspension clunk Before replacing struts for a noise, have a mechanic check if this TSB applies to your vehicle.
Choosing the Right Aftermarket Struts for Your Mazda 3
When it's time for a replacement, you have options outside of the dealership. Aftermarket parts offer a range of quality and price. For your Mazda 3, the choice comes down to whether you want to restore the original sporty feel or if a budget-friendly repair is your priority.
Brand Tiers:
Tier 1: OEM-Equivalent Quality (KYB)
KYB is a highly respected brand that is often the Original Equipment Manufacturer (OEM) for Mazda and other Japanese automakers. Choosing a KYB Excel-G strut is the best way to restore the original factory ride and handling your car was designed for. Drivers who switch to KYB often report a significant improvement in control and a reduction in the soft, bouncy feel of worn-out parts.
Tier 2: Budget-Friendly (FCS Struts)
FCS is known for its affordable struts and complete strut assemblies. While the lower price is attractive, the performance may not meet the expectations of a Mazda 3 owner who enjoys the car's handling. Some users report that FCS struts can feel too soft or may not last as long as premium brands, especially in harsh climates. These are a suitable choice if you're on a tight budget or planning to sell the vehicle soon.
Pro Tip: Bare Strut vs. Complete Assembly
You can buy a 'bare' strut (just the strut itself) or a 'complete strut assembly' (also called a 'quick strut'), which includes a new spring and mount. For the 2020-2025 Mazda 3, complete assemblies from aftermarket brands are common. While more expensive, they are much safer and faster to install because you don't need a dangerous spring compressor tool. It also ensures all related components are new.
🎬 Watch this step-by-step guide to replacing front strut assembliesHow Much Does It Cost to Replace Mazda 3 Struts?
The total cost depends on the parts you choose and local labor rates. Shops typically charge for 2-3 hours of labor to replace a pair of front struts, and a wheel alignment is required afterward.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Struts (Pair) | $134 - $187 |
| New OEM Struts (Pair) | $200 - $340 |
| Shop Labor (including alignment) | $366 - $537 |
| Total Estimated Cost (Aftermarket) | $500 - $724 |
| Total Estimated Cost (OEM) | $566 - $877 |
Frequently Asked Questions
Should I replace struts in pairs?
Yes, always. Struts should be replaced in pairs (both front or both rear) to ensure balanced handling and prevent unpredictable steering and braking. Replacing only one can create a dangerous imbalance.
Do I need a wheel alignment after replacing struts?
Yes, a four-wheel alignment is essential after replacing front struts. The strut is a key part of the suspension geometry, and replacement will alter the alignment angles. Skipping this step will cause poor handling and rapid, uneven tire wear.
Are there any recalls for the 2020-2025 Mazda 3 suspension?
As of early 2026, there are no active recalls from the NHTSA specifically for the struts or shock absorbers on the 2020-2025 Mazda 3. However, there is a TSB (02-004-22a) that notes some oil weeping from the strut shaft can be normal and not necessarily a sign of failure.
Can I replace the struts myself?
If you are replacing the complete strut assembly, the job is feasible for an experienced DIY mechanic with the right tools. However, if you are replacing only the bare strut, it requires a special spring compressor. This tool is very dangerous and can cause serious injury if not used correctly. For safety, this job is best left to a professional or an experienced DIYer using complete strut assemblies.
Helpful Videos
Technical Specifications
OEM Part Numbers: BDTS-34-90XK BDTS-34-70XK BDTS-34-90XN
The 2020-2025 Mazda 3 uses a MacPherson strut assembly in the front suspension. This is a structural component that integrates the shock absorber, coil spring, and upper mount. The rear suspension uses a separate shock absorber and spring. This article focuses on the front struts.
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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.
- Mazda 3:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is It Time for New Struts on Your Mazda 3?
- Common Symptoms of Failing Struts:
- A Note on Suspension Noises
- Choosing the Right Aftermarket Struts for Your Mazda 3
- Brand Tiers:
- Pro Tip: Bare Strut vs. Complete Assembly
- How Much Does It Cost to Replace Mazda 3 Struts?
- Frequently Asked Questions
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