Parts for your 2018 Subaru Impreza-Coil springs

2018 Subaru Impreza coil springs — what they do and when to replace them

Coil springs are absolutely fitted to the 2018 Subaru Impreza. Technical references including the Subaru Factory Service Manual for MY18 Impreza (Front and Rear Suspension sections), Subaru’s Global Platform technical briefing for the 5th‑gen Impreza (MacPherson strut front, double‑wishbone rear), and major parts catalogues/workshop manuals all specify coil springs at both axles. The front suspension is a MacPherson strut with a coil spring over the damper, and the rear is a double‑wishbone layout with a coil‑over damper assembly.

On this model, the coil springs carry the car’s weight, hold the correct ride height, and soak up bumps so the tyres keep solid contact with the road. They work with the dampers to control body motion, reduce nose‑dive under braking, and keep things tidy through corners. If a spring sags or breaks, handling, braking, and tyre wear can all go pear‑shaped pretty quickly.

For routine servicing, it’s smart to have the springs and their hardware looked over at each service interval (typically 12 months/15,000 km). A technician will check for:

• Cracks, broken coils, rust flaking or damaged paint
• Sagging ride height side‑to‑side
• Noises over bumps (clunks/creaks), often from worn insulators or seats
• Damaged top mounts, isolators, or spring seats

Coil springs don’t have a strict replacement interval and can last well past 100,000 km, but coastal use, heavy loads, and rough roads can shorten their life. When replacement’s needed, best practice is to change springs in axle pairs to keep handling balanced. Always follow the factory procedure with a proper spring compressor, and have a wheel alignment done afterwards, as ride height changes will nudge camber/toe. While the struts/shocks can be reused if they pass inspection, many owners take the chance to refresh dampers, top mounts, and rubber isolators at the same time for a tighter, quieter result.

Go for OEM‑spec or reputable aftermarket springs matched to the Impreza’s exact variant (2.0i, Sport, etc.), including any factory ride‑height differences. Correct seating of the spring in its perch, clocking of the end coil, and torqueing fasteners to specification (per Subaru’s service manual) make all the difference to ride quality and longevity.

FAQs: 2018 Subaru Impreza coil springs

How long do the coil springs usually last on a 2018 Impreza?
There’s no fixed expiry, but many sets go well beyond 100,000–150,000 km. Exposure to road salt or coastal air, carrying heavy loads, and rough roads can age them faster. If you notice sag, uneven ride height, or knocking over bumps, get them checked sooner rather than later.

Do the springs need to be replaced together with the struts?
They don’t have to be, but it’s wise to inspect and often refresh struts/shocks, top mounts, and rubber isolators at the same time. Pairing new springs with tired dampers can leave the ride bouncy and reduce control. Replacing components in axle pairs maintains balance.

Is an alignment required after changing coil springs?
Yes. Any change in ride height or disturbance of suspension geometry calls for a wheel alignment. It ensures camber and toe are back in spec, protecting tyre wear and restoring the crisp steering the Impreza is known for.