Bilstein 13-20 Nissan Pathfinder B4 OE Replacement Shock - Rear

The Bilstein 19-301631 is a B4 OE Replacement series rear shock absorber engineered specifically for the 2013-2020 Nissan Pathfinder S, SL, SV, and Platinum. Built with Bilstein's proven twintube design, the 19-301631 delivers a direct, no-modification fit that matches original equipment specifications and restores the smooth, controlled ride your Pathfinder had when it left the factory. Whether your current shocks are worn, leaking, or simply no longer controlling body motion effectively, the 19-301631 is the correct OE-quality replacement for the rear position on all R52-generation Nissan Pathfinder trims.

Key Features

• Direct OE Replacement: The Bilstein 19-301631 is engineered to match factory dimensions, mounting geometry, and ride characteristics for the 2013-2020 Nissan Pathfinder R52 platform.
• B4 OE Replacement Series: Designed to restore stock ride height and handling, not to alter suspension tuning. Ideal for drivers who want factory feel with Bilstein build quality.
• Twintube Construction: The twintube design provides a consistent, compliant damping response across everyday driving conditions, making it well-suited for family hauling and daily commuting.
• Black Paint Finish: Durable black paint coating provides corrosion resistance in road salt and moisture environments.
• No Modifications Required: Bolt-on installation using factory mounting points. Upper and lower mount hardware uses existing OE hardware for a straightforward swap.
• Prop 65 Compliant Labeling: Properly labeled per California Proposition 65 requirements.
• Bilstein Limited Warranty: Backed by Bilstein's standard limited warranty for defects in materials and workmanship.
• Sold Individually: One rear shock absorber per listing. Order two for a complete rear axle replacement.

Specifications

What's Included

• 1x Bilstein 19-301631 B4 OE Replacement Rear Shock Absorber

Fitment

Installation Instructions

The following steps outline a typical rear shock absorber replacement for the 2013-2020 Nissan Pathfinder R52. Always consult your factory service manual for vehicle-specific procedures. Torque all fasteners to specification with the vehicle at ride height (suspension loaded) to prevent bushing preload issues.

• Step 1 - Gather tools and supplies: You will need a floor jack, jack stands, 19mm socket and wrench, torque wrench, and basic hand tools. Review all steps before beginning.
• Step 2 - Prepare the vehicle: Park on a level surface, engage the parking brake, and chock the front wheels. Loosen the rear lug nuts slightly before lifting.
• Step 3 - Raise and support the vehicle: Lift the rear of the vehicle using a floor jack at the manufacturer's recommended jack point. Place jack stands under the frame rails. Do not work under a vehicle supported only by a floor jack.
• Step 4 - Remove the rear wheel: Remove the lug nuts and pull the wheel. Set it aside.
• Step 5 - Support the rear axle/knuckle: Place a floor jack under the rear suspension knuckle or lower control arm to support it while the shock is removed. This prevents the suspension from dropping sharply and overextending brake lines or ABS harnesses.
• Step 6 - Remove the lower shock mount bolt: Using a 19mm socket, remove the lower mounting bolt securing the shock to the rear knuckle. Note the bolt orientation for reinstallation.
• Step 7 - Remove the upper shock mount nut: Access the upper shock mount through the cargo area or from above the wheel well. Remove the 19mm upper mount nut.
• Step 8 - Remove the old shock absorber: With both mounts free, withdraw the shock absorber from the vehicle. Compare it to the Bilstein 19-301631 to confirm identical length and mounting geometry before proceeding.
• Step 9 - Install the Bilstein 19-301631: Position the new 19-301631 shock absorber with the upper mount aligned to its mounting point. Hand-thread the upper mount nut first to hold the shock in place.
• Step 10 - Align the lower mount: Lower or raise the knuckle jack as needed to align the lower mount hole. Insert the lower mount bolt and hand-thread it.
• Step 11 - Lower the vehicle to ride height before final torque: This is critical. Lower the vehicle so the suspension is loaded under the vehicle's own weight before torquing either fastener. Torquing at full droop causes bushing wind-up and premature wear.
• Step 12 - Torque fasteners to specification: Torque the upper mount nut to 129 ft-lbs (19mm) and the lower mount bolt to 129 ft-lbs (19mm). Verify both fasteners are fully seated.
• Step 13 - Reinstall the wheel: Reinstall the wheel and torque the lug nuts to factory specification in a star pattern.
• Step 14 - Repeat for the opposite side if applicable: If replacing both rear shocks, repeat all steps for the other side before lowering the vehicle fully.
• Step 15 - Test drive and inspect: Perform a slow test drive and listen for unusual noises. Inspect mounting hardware after the first drive and re-check torque if any clunking is present.

Frequently Asked Questions

What is the difference between the Bilstein B4 and B6 shock absorbers?
The B4 OE Replacement series, which includes the 19-301631, is engineered to restore factory ride quality and damping characteristics. It is a direct replacement for worn OE shocks with no change in ride height or handling tuning. The B6 Performance series is a firmer, performance-oriented upgrade intended for drivers who want enhanced handling response and reduced body roll, often at the cost of a slightly stiffer ride. If your goal is to return the Pathfinder to how it rode when new, the B4 and the 19-301631 specifically are the correct choice.

What is the difference between twintube and monotube shock absorbers?
A twintube shock uses an inner working tube and an outer reserve tube. The reserve tube holds additional fluid and allows the shock to manage heat and fluid expansion during extended use. Twintube designs like the one used in the Bilstein 19-301631 are well-suited to everyday driving cycles, provide a compliant and comfortable ride, and are the correct OE replacement design for the Nissan Pathfinder R52 platform. A monotube shock uses a single tube with a floating piston separating gas and oil. Monotube designs are common in performance applications but are not required for OE replacement duty on a family SUV.

Will replacing the rear shocks fix a bouncy or wallowing ride on my Pathfinder?
Yes, in most cases. When a rear shock absorber loses its damping capability, the most common symptoms are excessive bouncing after bumps, a floating or wallowing sensation at highway speeds, and increased body roll in corners. Installing the Bilstein 19-301631 B4 OE replacement restores proper damping to the rear suspension and should eliminate these symptoms if the shocks are the root cause. Always inspect strut mounts, bushings, and springs at the same time, as worn components in those areas can produce similar symptoms.

Will the Bilstein 19-301631 fit the Infiniti QX60?
The Infiniti QX60 and the Nissan Pathfinder R52 share the same platform, and many suspension components are related. However, fitment must be confirmed by part number cross-reference before ordering. The 19-301631 is specifically listed for the 2013-2020 Nissan Pathfinder S, SL, SV, and Platinum. Do not assume fitment for the QX60 without verifying through a Bilstein fitment guide or your vehicle's factory part number.

How long does it take to install rear shock absorbers on a 2013-2020 Nissan Pathfinder?
For a technician with basic lift equipment, replacing both rear shocks typically takes one to two hours. A home mechanic working with floor jacks and jack stands should budget two to three hours to complete both sides, including the critical step of lowering the vehicle to ride height before final torque. The job requires no special tools beyond a torque wrench and 19mm sockets.

What warranty coverage comes with the Bilstein 19-301631?
The 19-301631 is backed by Bilstein's standard limited warranty covering defects in materials and workmanship. Warranty claims are handled through Bilstein's warranty process. See the Warranty section below for additional detail regarding your consumer rights under the Magnuson-Moss Warranty Act.

What does Prop 65 mean for this product?
California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986) requires businesses to provide warnings before knowingly exposing individuals to chemicals listed by the State of California as known to cause cancer, birth defects, or other reproductive harm. The Bilstein 19-301631 carries a Prop 65 warning because it contains or may expose you to such chemicals. This does not mean the product is unsafe for its intended use as an installed automotive component. The warning is a disclosure requirement, not a product defect. See the Prop 65 notice below for the full required warning text.

Is the Bilstein 19-301631 a performance upgrade or a stock replacement?
The 19-301631 is a stock OE replacement, not a performance upgrade. The B4 OE Replacement series is built to match the original damping rates, ride height, and handling balance specified by Nissan for the Pathfinder R52. If you are looking for a stiffer, sportier setup or want to pair with a lift or lowering spring, you would need a different Bilstein product line. The B4 is the correct choice when the goal is restoring the factory driving experience on a vehicle with high mileage or worn-out original shocks.

California Prop 65 Warning

WARNING: This product can expose you to chemicals including lead and its compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.

Warranty Information

The Bilstein 19-301631 is covered by Bilstein's standard limited warranty against defects in materials and workmanship under normal use and service conditions. This warranty is provided in addition to, and does not limit, any rights you may have under applicable federal or state law.

Under the Magnuson-Moss Warranty Act (15 U.S.C. 2301 et seq.), consumers have the right to know the terms of any written warranty before purchase. Bilstein's limited warranty is a written warranty as defined under Magnuson-Moss. This warranty does not require you to use any specific brand of replacement parts, fluids, or service in order to maintain coverage, provided such parts and service are equivalent in quality to OE specifications. Using non-Bilstein shocks on other axle positions does not void warranty coverage on a properly installed 19-301631.

Warranty claims and questions should be directed to Bilstein's customer service. Retain your purchase receipt as proof of purchase date.