Monroe
OESpectrum Passenger Car Shock Absorber

Monroe 5540 Shock Absorber - Rear

Brand Monroe 5540
Position Rear
Compressed Bumper Stop No
Compressed Length 16.34
Dust Shield No
Extended Bumper Stop Yes
Extended Hydraulic Lockout No
Extended Length 25.76
Lower Mounting Code LS29
Lower Mounting Type Loop Bushing & Sleeve Mount - 12MM Sleeve ID X 1.3/4" Sleeve OAL
Parts Pack P01682
Reserve Tube Diameter 1.519
Travel Length 9.42
Upper Mounting Code S1
Upper Mounting Type Stem Mount - Stem Length X M10 Thread Pitch
Product line OESpectrum Passenger Car Shock Absorber
Fits Mazda · 5 vehicles

Factory ride restored. Returns original drivability with precise handling and control.

Noise and vibration filtered. Helps reduce harshness for a quieter, smoother ride.

Stem and loop mounts. Built with a stem upper mount and loop bushing lower mount.

Cross-references Focus Auto Parts 346443, KYB 3430041 and 70207 for the same application. See all 6.

$56.88Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Shock Absorbers are typically replaced in pairs, axle by axle.
Order total $56.88
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.

Monroe OESpectrum Rear Shock for Mazda 3

Monroe OESpectrum 5540 is a rear suspension shock absorber for the 2014-2018 Mazda 3. It is built to restore factory-style drivability while improving handling precision and control, with tuning aimed at reducing noise, vibration, and harshness.

Key Features

  • Rear shock absorber for the 2014-2018 Mazda 3
  • Monroe OESpectrum passenger car shock absorber line
  • Compressed length: 16.34 in.; extended length: 25.76 in.
  • Travel length: 9.42 in. for rear suspension movement
  • Upper mount: stem mount with M10 thread pitch
  • Lower mount: loop bushing and sleeve mount with 12 mm sleeve ID
  • Extended bumper stop included in the design
  • Reserve tube diameter: 1.519 in.

Product Details

The Monroe OESpectrum Passenger Car Shock Absorber line is focused on OE-style ride control for daily-driven vehicles. Part number 5540 uses a stem upper mount and loop bushing lower mount to match the rear suspension layout on the Mazda 3, helping maintain consistent damping response and stable road feel. This part cross-references KYB 3430041 for the same application.

Compatible with 2014-2018 Mazda 3 rear suspension applications, Monroe 5540 is a direct-fit rear shock absorber for drivers replacing worn factory components. It is also listed for the same application under Focus Auto Parts 346443.

What It Helps Address

  • Excessive rear bounce after bumps or dips
  • Reduced body control during cornering and lane changes
  • Harshness or noise from worn rear shock damping
  • Uneven ride quality caused by aging suspension components
  • Loss of factory-like rear suspension response on a Mazda 3

Installation Notes and Tips

Verify rear fitment by year, make, model, and mounting style before installation. The upper mount is a stem mount with M10 thread pitch, and the lower mount is a loop bushing and sleeve design with a 12 mm sleeve ID and 1.75 in. sleeve overall length. Inspect surrounding suspension bushings, mounts, and fasteners for wear before replacing the shock.

Quality Assurance

Monroe designs the OESpectrum line to deliver OE-style drivability and controlled ride performance while filtering out unwanted noise, vibration, and harshness. Part number 5540 is engineered for the rear suspension of the 2014-2018 Mazda 3 and built around factory-style fitment requirements.

This part fits 5 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2018Mazda3RearEnhances performance for vehicles with stock components.; OESpectrum Passenger Car Shock Absorber
2017Mazda3RearEnhances performance for vehicles with stock components.; OESpectrum Passenger Car Shock Absorber
2016Mazda3RearEnhances performance for vehicles with stock components.; OESpectrum Passenger Car Shock Absorber
2015Mazda3RearEnhances performance for vehicles with stock components.; OESpectrum Passenger Car Shock Absorber
2014Mazda3RearEnhances performance for vehicles with stock components.; OESpectrum Passenger Car Shock Absorber
Directly replaces or cross-references 6 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Focus Auto Parts — 346443KYB — 343004170207BABF28700BBHN228910BBJS728700F