Worn struts or shocks make your car feel floaty, bouncy, or downright scary over bumps, and they quietly eat into your tire life and braking distance along the way. Replacing them yourself can save a few hundred dollars per axle, but this is one of the more physically demanding and genuinely dangerous DIY jobs on a car because of the compressed spring sitting inside most strut assemblies. Read through this whole guide before you touch a wrench, and be honest with yourself about your tools, your workspace, and your patience before deciding this is a job for your driveway instead of a shop.
Signs You Need New Struts or Shocks
Struts and shocks rarely fail suddenly. Instead they degrade slowly, so a lot of drivers get used to a worse ride without noticing. Common symptoms include excessive nose-dive when braking, a bouncy or wallowy feeling over highway expansion joints, the front end continuing to bounce two or three times after you hit a pothole instead of settling right away, and uneven or cupped tire wear on the front tires. Some vehicles will also develop a clunking or knocking noise over bumps, which can mean a worn strut mount or a failing shock rather than the strut body itself.
A simple at-home check is the bounce test: push down hard on the front corner of the car and let go. If it bounces more than once or twice before settling, the strut or shock on that corner is likely tired. Visually inspect the strut body too. Any oily residue running down the outside of the shaft is a sign the seal has failed and it is leaking hydraulic fluid, which means it has lost most of its damping ability even if it still looks intact otherwise.
Most manufacturers suggest having struts and shocks inspected around 50,000 miles and replaced somewhere between 50,000 and 100,000 miles depending on driving conditions, vehicle weight, and road quality. If you tow, carry heavy loads regularly, or drive mostly on rough roads, you will likely be on the earlier end of that range. Pairing this job with your regular upkeep is smart, and a broader car maintenance schedule can help you catch wear before it turns into a safety issue.
Difficulty, Time, and Cost: Is This Worth DIYing
Be realistic about where this job sits on the difficulty scale. Replacing front struts or shocks is intermediate to advanced DIY work, not a beginner's first project. Expect to spend three to five hours per axle the first time you do it, even longer if bolts are rusted or seized, which is common on vehicles that have seen winter road salt. Budget a full weekend day if you are doing both front corners and you want time to double-check your work before driving on it.
Cost-wise, a quality pair of front struts or shocks typically runs $150 to $400 depending on your vehicle, plus another $50 to $150 if you choose loaded struts that already include the spring and mount, which skips the need for a spring compressor entirely. A basic spring compressor tool rents for $20 to $50 or costs $40 to $100 to buy, and you may also need new strut mounts, bearing plates, or boots, which add another $20 to $60 per side. All told, DIYing a front strut job often costs $250 to $600 in parts and tools versus $600 to $1,200 or more at a shop for parts and labor combined, so the savings can be real if you already own a reasonable set of tools.
Tools and Materials You'll Need
Gathering everything before you start saves you from stopping mid-job with the car on jack stands and a half-disassembled strut sitting on your bench. Here is a solid baseline list for most vehicles:
- Floor jack and two jack stands rated for your vehicle's weight
- Wheel chocks
- Lug wrench or breaker bar and socket set
- Spring compressor (unless you are installing pre-loaded struts)
- Torque wrench
- Penetrating oil for seized bolts
- Socket and wrench set, including deep sockets for strut shaft nuts
- Safety glasses and work gloves
- New struts or shocks, and new strut mounts or bearings if recommended
- Your vehicle's repair manual or model-specific torque specs
Exact tool needs and torque specifications vary by year, make, and model, so before you buy anything, look up your specific vehicle on CarCareKiosk, which has free step-by-step videos for thousands of vehicles by exact year, make, and model. Watching the actual procedure for your car once beforehand will save you a lot of guesswork.
Safety Precautions Before You Start
The spring compressor is the part of this job that demands your full attention. A coil spring compressed inside a strut assembly holds a tremendous amount of stored energy, and if it slips off a poorly seated compressor, it can launch with enough force to cause serious injury.
Never work under a car supported only by a jack. Always use rated jack stands on solid, level ground, and never place any part of your body in the path a spring could travel if a compressor were to slip.
Beyond the spring itself, make sure your jack stands are placed on the vehicle's actual frame or designated lift points, not on a plastic rocker panel cover or a suspension component that could bend or break. Wear safety glasses the entire time you have the spring under compression, and double-check that compressor hooks are fully seated on at least three coils before you start tightening. If anything about the compressor feels loose, uneven, or unstable, stop and reposition it before continuing.
Step-by-Step: Replacing Front Struts or Shocks
- Park on level ground, chock the rear wheels, and loosen the front lug nuts slightly before jacking up the car.
- Raise the front of the vehicle, support it securely on jack stands, and remove the front wheels.
- Locate the strut assembly and spray penetrating oil on the mounting bolts if they look rusted, giving it time to soak in.
- Disconnect the sway bar link, brake line bracket, and any wiring attached to the strut.
- Remove the lower strut bolts connecting it to the steering knuckle, supporting the knuckle so it does not drop suddenly.
- From the engine bay or under the hood, remove the upper strut mount nuts, then carefully lower and remove the complete strut assembly.
- If using an unloaded strut, attach the spring compressor evenly across the coils and compress the spring slowly and symmetrically until the upper mount can be removed from the old strut body.
- Transfer the spring, mount, and bearing to the new strut (or skip this step entirely if using a pre-loaded strut assembly).
- Slowly release the spring compressor once everything is reassembled, confirming the spring seats correctly in its perch.
- Reinstall the strut assembly in reverse order, torquing all bolts to your vehicle's specifications with a torque wrench.
- Reconnect the sway bar link and any brackets or wiring, reinstall the wheel, and lower the car.
- Repeat the entire process on the opposite side, since struts and shocks should almost always be replaced in pairs.
Take your time on torque specs in particular. Under-tightened strut bolts can work loose and cause dangerous handling issues, while over-tightening can strip threads or damage mounts.
After the Swap: Alignment, Break-In, and When to See a Mechanic
Once both struts are installed, get a wheel alignment within a week or two. Removing and reinstalling the strut can shift the camber and caster slightly even if you did not touch any alignment-specific bolts, and driving on misaligned wheels wears out your new tires quickly. While you are thinking about suspension-related upkeep, it is also a good time to check related wear items like brake pads, since you already have the front end apart; see our guide on how to change your brake pads for that process.
There are times this job is better left to a professional. If you do not have a safe, flat place to work with the car fully supported, if bolts are severely rusted and you lack the tools to deal with seized hardware safely, or if you are not confident handling a compressed spring, pay a shop for this one. Suspension work affects steering and handling directly, so there is no shame in outsourcing it if something feels outside your comfort zone. A mechanic can also catch related wear, like failing control arm bushings or tie rod ends, that are easy to miss on a first DIY attempt.
If you want more real-world car care content and behind-the-scenes garage work, follow TRE Forged on Instagram (@treforged) for tips between articles. And if you are trying to plan ahead financially for repairs like this one, it is worth reading up on what car maintenance actually costs so jobs like a strut replacement never catch your budget off guard.
Quick Recap
- Check for signs of worn struts or shocks, like excessive bounce, nose-dive, or uneven tire wear.
- Decide honestly whether this job fits your tools, workspace, and comfort with a spring compressor.
- Gather all tools and parts beforehand, including a torque wrench and your vehicle's specific torque specs.
- Set up safely with jack stands on solid ground and never work under a vehicle supported only by a jack.
- Raise the car, remove the wheel, and disconnect the strut from the knuckle and upper mount.
- Use a spring compressor carefully if needed, or skip it by using a pre-loaded strut assembly.
- Reassemble and torque every bolt to spec, then repeat on the opposite side since struts are replaced in pairs.
- Get an alignment afterward and watch for any unusual noises or handling changes before trusting the repair fully.