Is replacing suspension hard?

Yes, replacing suspension is usually a challenging job that benefits from experience, proper tools, and a safe workspace.

On this page we examine why suspension work can be tough, what to expect for cars and bicycles, and how to decide whether to DIY or hire a professional. The discussion covers key factors that influence difficulty, typical steps at a high level, safety considerations, and practical guidance for planning the job.

What makes suspension replacement hard?

Several factors determine how difficult the job will be. The list below highlights the main ones that DIYers encounter.

• Suspension design and component type (struts, shocks, control arms, linkages, or air springs). More complex multi-link setups or integrated units are harder to service than simple shocks.


• Access and space under the vehicle or bike frame. Cars with low ground clearance or tight wheel wells and bikes with obscured mounting points raise the difficulty.


• Safety-critical systems and ancillary hardware. Brake lines, ABS/EDS sensors, or electronically controlled suspension require extra care and potentially recalibration.


• Tools, equipment and workspace. Spring compressors, torque wrenches, alignment equipment, jack stands, and a flat, level workspace are essential for safe replacement.


• Experience, manuals and correct specs. Following the factory service manual and using the right torque specs and procedures is crucial to avoid damage or unsafe riding.

In short, the difficulty scales with design complexity, access, and the need to preserve safety-critical systems. For many DIYers, professional service or at least a thorough manual review is a prudent choice.

Car suspension replacement basics

Before tackling a car suspension job, understand the general workflow and where safety considerations come in.

• Identify the exact component to replace (for example, strut assemblies, shocks, control arms, or sway links) and verify compatibility with your vehicle.


• Safely lift and support the vehicle, remove wheels, and access mounting points, taking care with loaded springs and delicate components.


• Remove the old part, inspect surrounding hardware, and install the new component with correct fasteners and torque specs. Replace any related hardware if recommended by the manufacturer.


• Reassemble, reconnect any sensors or lines as required, and verify that fasteners are torqued to spec. Check brakes and ensure no clearance issues.


• After installation, check for leaks, inspect ride height and alignment needs, and perform a careful test ride or road test in a controlled environment.

Common pitfalls include neglecting to support the springs safely, using incorrect torque values, or skipping an alignment when replacing suspension components that affect wheel geometry. If in doubt, consult the service manual or a professional shop.

Key considerations for car suspension work

Factory service manuals provide model-specific guidance, including torque specs, fastener replacement intervals, and alignment tolerances. Some cars require recalibration of adaptive dampers or alignment sensor reset after parts replacement.

Bicycle suspension replacement basics

For bicycles, suspension work ranges from simple fork oil service to complete damper or spring replacements, with less risk than a car but still requiring care.

• Confirm compatibility of the replacement fork or rear shock with your frame and wheel size, travel, and mounting standards.


• Prepare the bike by securing it in a stand, removing wheels if necessary, and safely decompressing any stored springs or air shocks.


• Use the correct tools and follow the manufacturer’s steps for removing and installing the new unit, including resealing and recharging air shocks if applicable.


• After installation, adjust preload, sag, and rebound according to your weight and riding style, and verify that the fork seals, bushings, and air pressures are correct.


• Test ride in a safe area to check for smooth operation, clearance, and any rubbing or binding, then recheck torque and connections after a short ride.

Even though bicycle suspension work is typically less hazardous than automotive work, improper setup can lead to poor handling or damage. Consult the manual or a shop if you’re unsure.

Important adjustment considerations for bikes

Proper sag, preload, and rebound settings are essential for predictable handling. Air shocks require accurate air pressure calibrations; coil forks and shocks use spring rates selected for rider weight and riding style.

Safety and when to seek professional help

Replacing suspension can involve high forces, compressed springs, or critical steering and braking links. If you lack proper tools, workspace, or experience, or if the vehicle or bike has complex electronics, consider professional service.

When in doubt, a professional mechanic or a trusted bike shop can verify alignment, calibrations, and safe operation after installation. This can save time and reduce risk of accidents caused by improper installation.

Summary

Replacing suspension is a challenging task that varies by vehicle type, suspension design, and the installer’s experience. Cars with complex multi-link systems or air suspensions and bicycles with advanced dampers present greater difficulty. Preparation, the right tools, adherence to manuals, and a clear safety plan are essential. If you’re unsure, seek professional help to ensure safe handling, proper alignment, and reliable ride quality.

Can I replace my shocks myself?

Yes, you can replace shocks yourself, but it's a more involved job that requires specific tools like a spring compressor, especially for struts. While rear shock replacement is often a straightforward task with basic tools, front struts can be more complex and may involve needing a spring compressor to safely remove and install the old and new springs. It is critical to have the vehicle properly supported on jack stands for safety before starting any work. 
What you'll need

• New shocks/struts: It's best to replace them in pairs, on the same axle. 
• Tools: A breaker bar, sockets (e.g., 15mm, 18mm), a torque wrench, and a jack are essential. 
• Penetrating oil: To loosen any rusted bolts. 
• Thread locker: Such as blue Loctite, to prevent bolts from loosening due to vibration. 
• Spring compressor: This is crucial and potentially dangerous if not used correctly. Consider buying a "quick strut" assembly that has the spring and top hat pre-installed, which eliminates the need for a spring compressor. 

This video demonstrates the basic steps for replacing shocks: 59sChrisFixYouTube · Jan 5, 2015
Safety and preparation

• Park on a flat surface: Ensure the parking brake is engaged. 
• Use jack stands: Lift the vehicle safely and secure it on jack stands at the manufacturer's recommended points. Never work under a car that is only supported by a jack. 
• Replace shocks in pairs: You should always replace both shocks on the same axle at the same time to maintain balance and proper handling. 

Key steps

1. Remove the wheel: Take the wheel off after the vehicle is on jack stands. 
2. Locate bolts: Find the top and bottom bolts of the shock absorber. 
3. Remove old shock: Use penetrating oil to help loosen any rusted bolts. Remove the bottom bolt first, then the top bolts. You may need to use a breaker bar or a pipe for extra leverage if the bolts are stubborn. 
4. Install new shock: Position the new shock and secure the bottom bolt first. 
5. Secure top bolt: Once the bottom is in place, compress the new shock if needed to align and install the top bolt, applying thread locker first. 
6. Torque to spec: Use a torque wrench to tighten all bolts to the manufacturer's specified torque setting. 
7. Reinstall wheel: Put the wheel back on. 
8. Lower the car: Safely remove the jack stands and lower the vehicle. 
9. Get an alignment: After replacing shocks and struts, it is necessary to get a professional alignment. 

How hard is it to replace suspension?

Honestly, it's pretty easy. Just make sure you get the right tools (breaker bar, sockets, etc.). Spray bolts with penetrating oil the night before. Try not to rip your axels out (unless you are replacing).

How long does it take to change suspension?

Replacing a vehicle's suspension can take anywhere from a couple of hours for basic parts like rear shocks to a full day or more for complex issues like a complete overhaul. The time varies based on the specific components being replaced, the vehicle's make and model, the mechanic's experience, and the condition of the parts, particularly if bolts are rusted or seized. For example, replacing front struts can take 1-2 hours, while replacing rear shocks might take about 2 hours for both, with rust adding significant time to any job. 
Factors that influence the timeline

• Type of repair: Simple jobs like replacing individual shocks or ball joints are quicker than replacing an entire assembly of parts like control arms, struts, and bushings. 
• Vehicle condition: If the vehicle is in a region that uses road salt, parts are likely to be rusted, which can cause significant delays, potentially turning a few hours' job into a full-day task. 
• Tools and experience: A skilled mechanic with the right tools, such as air tools and a lift, can complete the job much faster than a novice working with basic hand tools in their driveway. 
• Part availability: Some suspension systems have components that are easier to replace than others, and the overall time will depend on how complex the job is. 

Estimated time for common repairs

• Rear shocks: Around 1 to 2 hours for both, assuming no major issues with seized bolts. 
• Front struts: Approximately 1 to 2 hours for a DIY job, but a professional with the right tools can do it in under an hour. 
• Full front suspension replacement: Anywhere from 4 hours to a full day or more, depending on the complexity and condition of the vehicle. 

Important considerations

• Aftercare: After replacing suspension parts, the vehicle will need a wheel alignment, which should be factored into the total time and cost. 
• Re-torquing: It is crucial to re-torque bolts after about 30 days, especially after a full suspension replacement, to ensure everything is still secure. 

How much would it cost to replace a suspension?

Car suspension repairs typically cost between $150 and $800 for basic vehicles, but luxury models or complex repairs can exceed $2,000. The cost to repair or replace suspension components depends on what you need done — and in how many corners of the vehicle.