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Bmw M135I Coil Springs

Bmw M135I Coil springs

Coil springs for your Bmw M135I start at $103.95, and AutoBuffy stocks 1 options from Lesjofors. Coil springs bear the full weight of your vehicle and absorb road impacts by compressing and rebounding. When they crack, sag, or break, ride height drops, handling degrades, and uneven tire wear accelerates — problems that compound quickly if ignored.

Signs your Bmw M135I needs new coil springs

  • One corner of the vehicle sits noticeably lower than the others when parked on level ground
  • A sharp clunking or popping sound from the suspension when going over bumps or turning into driveways
  • Excessive body roll in corners that was not present before, even at moderate speeds
  • Uneven or accelerated tire wear, particularly on the inner or outer edges of the tread
  • Visible cracks, breaks, or rust corrosion on the spring coils when inspected under the vehicle
  • Bottoming out over moderate bumps that the suspension previously handled without bottoming

Which coil spring should you buy for your Bmw M135I?

The most important decisions are matching the correct spring rate and ride height to your intended use, and choosing between OE-replacement and performance-tuned options. Springs are sold individually or in pairs (axle sets), and replacing in pairs is strongly recommended to maintain balanced handling and even ride height.

OE-Replacement (standard rate)
Best for
Restoring factory ride and handling after a broken or sagged spring
What you get
Same spring rate and free length as the original; direct bolt-on fit with no alignment changes required
Heavy-Duty / HD Spring
Best for
Vehicles that frequently carry heavy loads, tow, or need added durability over rough roads
What you get
Higher spring rate than stock; resists sag under load; typically uses higher-grade steel or thicker coil wire
Lowering Spring
Best for
Drivers wanting improved handling and a lower stance without a full coilover kit
What you get
Reduced free length lowers ride height 1–2 inches; firmer spring rate sharpens cornering but reduces suspension travel
Coilover Spring (sold separately)
Best for
Enthusiasts running adjustable coilover dampers who need a specific rate or length
What you get
Available in a wide range of spring rates; length and ID must match the specific coilover sleeve — not a universal drop-in

Coil springs brands we stock for your Bmw M135I

Lesjofors
1 option · from $103.95

Replacing coil springs on a Bmw M135I

Advanced⏱ 2–3 hours per axleSpring compressor (rented or professional-grade)Floor jack and jack standsSocket and ratchet setTorque wrenchPry bar

Coil spring replacement is rated Advanced primarily because of the spring compressor step — a compressed spring stores enormous energy and can cause serious injury if it releases unexpectedly. The spring must be fully compressed before the strut assembly is disassembled or the spring is removed from a solid-axle perch. Once the spring is safely out, installation is straightforward: seat the new spring correctly in its upper and lower perches, ensure any pigtail or end coil aligns with the locating notch, and reassemble to manufacturer-specified torque ranges using a service manual for your Bmw M135I.

Frequently asked questions

How much does it cost to replace coil springs on a Bmw M135I?
Parts alone start at $103.95 at AutoBuffy. A complete DIY job adds only basic tooling costs. Professional installation typically runs one to two hours of labor per axle on top of parts cost. Replacing springs in pairs on the same axle is standard practice and keeps total costs predictable.
Can I drive my Bmw M135I with a broken coil spring?
No — driving on a broken coil spring is unsafe and should be avoided. A fractured spring can puncture a tire, damage the strut or shock, and cause sudden loss of vehicle control. The corner with the broken spring will sit low and handling will be unpredictable, especially during emergency maneuvers.
How long do coil springs last on a Bmw M135I?
Coil springs typically last many years, but lifespan varies widely based on road conditions, load habits, and climate. Vehicles regularly exposed to road salt, potholes, or heavy cargo tend to see springs sag or crack sooner. Inspect springs any time struts or shocks are replaced, since both wear on similar timelines.
Do I need an alignment after replacing coil springs on my Bmw M135I?
Yes, a four-wheel alignment is strongly recommended after coil spring replacement. Even OE-spec springs can shift alignment angles slightly during installation, and lowering springs will almost certainly change camber and caster. Skipping the alignment accelerates tire wear and can cause the vehicle to pull to one side.
Should I replace coil springs in pairs on my Bmw M135I?
Yes — always replace coil springs in axle pairs. Springs on the same axle wear at nearly the same rate. Installing one new spring alongside an old, sagged spring creates a height imbalance that causes uneven handling, pulling, and accelerated wear on tires and other suspension components.
What is the difference between a coil spring and a strut on my Bmw M135I?
A strut is a structural suspension component that combines a shock absorber with a mounting point for the steering knuckle. A coil spring is a separate load-bearing component that may surround the strut or mount independently, depending on the suspension design. Both work together, but they are distinct parts with different failure modes.

Shop coil springs by year for the Bmw M135I

20212020

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