2013-2017 Range Rover L405 Rear Bumper: A Guide to Parking Sensor Variations
This guide explains the critical differences between the 4-sensor and 6-sensor rear bumpers to ensure you purchase the correct part for your 2013-2017 Range Rover.
- The most critical factor is verifying if your vehicle has the 4-sensor standard system or the 6-sensor Automatic Park Assist system.
- Part number LR057291 is for the 4-sensor system, while LR057290 is for the 6-sensor system with side flank guards.
- When buying used, prioritize inspecting all mounting tabs and the wiring harness for damage, as this is common.
- A known issue is water ingress into the Blind Spot Monitoring modules located behind the bumper, which may require bumper removal to replace.
Key Differences: Standard vs. Automatic Park Assist
The single most important factor when replacing the rear bumper on a 2013-2017 Range Rover is the vehicle's specific parking assistance package. While the bumpers look nearly identical, the number and location of sensor holes are different, and they are not interchangeable. Installing the wrong bumper will result in system errors and non-functional driver aids.
Standard Park Assist (4-Sensor System)
Vehicles with the standard front and rear parking aid system have four ultrasonic sensors mounted on the rear bumper face. This system provides audible and visual warnings of obstacles directly behind the vehicle. The correct bumper cover for this system will have only these four sensor holes. The primary OEM part number for this version is LR057291.
Automatic Park Assist (6-Sensor System)
Vehicles equipped with the advanced 'Park Assist' feature, which can automate parallel and perpendicular parking maneuvers, use a six-sensor system. This includes the four standard sensors on the rear face, plus two additional 'flank guard' sensors, one on each corner of the bumper, facing outwards. These side sensors are necessary for the system to measure the length of a parking space as you drive past it. The correct bumper cover for this system has six sensor holes. The primary OEM part number for this version is LR057290.
Pro Tip: The easiest way to identify your system is to physically count the sensors on your current bumper. Look at the corners just behind the rear wheels. If you see a sensor on the side of the bumper, you have the 6-sensor Automatic Park Assist system.
Symptoms of Failure
Failure of the rear bumper assembly can be either physical or electronic.
- Physical Damage: This is the most common failure. Look for cracks, deep scuffs, punctures, or broken mounting tabs, usually resulting from a collision. A loose or sagging bumper can be a road hazard.
- Parking Aid System Faults: A message on the dashboard such as "Park Assist Unavailable" can indicate a problem. This could be a failed sensor, a damaged wiring harness within the bumper, or water intrusion into a connector.
- Constant Beeping: A continuous tone from the parking system when in reverse can mean one of the sensors has failed or is obstructed.
- Blind Spot Monitor Faults: The Blind Spot Monitoring System (BSMS) modules are located behind the bumper cover. An impact that doesn't visibly crack the bumper can still damage these sensitive electronic modules, causing system warnings and malfunction.
Known Issues, TSBs, and Recalls
While there are no specific recalls for the rear bumper assembly itself, several Technical Service Bulletins (TSBs) and related issues are important for owners to know.
- TSB LTB00660 - Bumper Wiring Harness Damage: Land Rover identified that the rear bumper wiring harness could become damaged through contact with other components. The official fix involves installing a protective sleeve on the harness to prevent future damage. When inspecting a used bumper, check the harness for any signs of chafing or previous repairs.
- TSB NSO-LTB00781NAS1 - Rear Bumper Harnesses: A TSB with this title exists for 2015 models, indicating a known issue, though specific details are limited. It reinforces the importance of inspecting the wiring harness.
- Service Action N031 - Blind Spot Module Water Ingress: On 2015 models, the Blind Spot Monitoring Control Modules (located behind the bumper) were found to be susceptible to water getting inside. This can cause failure of the blind spot system. The fix involves replacing the modules, which requires removing the rear bumper cover.
Buying a Used Bumper Assy, Rear
A used OEM bumper is often the best value, providing factory-grade fit and quality at a lower cost. However, careful inspection is crucial.
Verification Checklist:
- Confirm Sensor Count: This is the most critical step. Count the sensor holes. Ensure it's 4 or 6, matching your vehicle's system exactly.
- Match the Part Number: If possible, get the part number from the seller and match it to your original part or the known variants (LR057290 for 6-sensor, LR057291 for 4-sensor).
- Inspect All Mounting Points: Carefully check all plastic tabs, slots, and brackets, especially on the top edge where it meets the body and at the corners where it attaches to the quarter panels. These are easily broken during removal and are essential for proper alignment.
- Look for Hidden Repairs: Check the backside of the bumper for signs of plastic welding, epoxy, or body filler. These repairs may not be visible from the painted side but can compromise the integrity of the bumper.
- Check the Wiring Harness: Inspect the included wiring harness for any cut wires, damaged connectors, or signs of chafing. A damaged harness can be difficult and expensive to fix.
- Understand What's Included: Clarify with the seller if the assembly includes the sensors, wiring harness, tow eye cover, and lower valance. A "bare" bumper cover will require you to transfer all these components from your old bumper.
Warning: Avoid cheap aftermarket bumpers. For a precision vehicle like the Range Rover, aftermarket panels often suffer from poor fitment, leading to uneven gaps, difficult installation, and a finish that doesn't match the original texture and durability.
Cost Comparison
Prices can vary based on condition, location, and included components. The following are estimates as of late 2024.
| Part Type | Estimated Cost | Notes |
|---|---|---|
| New OEM | $1,200 - $1,400 | Sold unpainted (primered). Does not typically include sensors or harness. |
| New Aftermarket | $450 - $700 | Fit and quality can be inconsistent. May require significant prep work before painting. |
| Used OEM | $400 - $650 | Best value. Comes in a factory color but may have minor cosmetic flaws. |
| Shop Labor for Replacement | $250 - $450 | Typically 2-3 hours of labor. Does not include painting. |
Replacement Overview
Replacing the rear bumper cover is a moderately difficult job that a skilled DIY mechanic can perform. The process generally involves removing fasteners in the wheel wells, the undertray, and the tail lights to access the main mounting bolts and clips.
- Difficulty: 3/5
- Estimated Time: 2-3 hours
- Tools Needed: Basic socket set, screwdrivers, plastic trim removal tools.
- Key Steps:
- Disconnect the battery.
- Remove the rear tail lights to access upper bumper fasteners.
- Remove screws inside the rear wheel arches.
- Remove bolts and clips securing the plastic undertray.
- Carefully pull the sides of the bumper cover outwards to release it from the clips on the quarter panels.
- With a helper, pull the bumper back slightly and disconnect the main electrical connector for the parking sensors and lights.
- If reusing components, transfer the sensors, wiring harness, and any trim to the new bumper cover before installation.
Caution: The parking aid sensors are delicate. When transferring them to the new bumper, handle them with care and ensure they are seated correctly in their brackets.
Frequently Asked Questions
How do I know for sure which park assist system my Range Rover has?
The most reliable method is a visual inspection. Stand at the rear corner of your vehicle and look at the side of the bumper, just behind the rear wheel. If you see a round sensor, you have the 6-sensor Automatic Park Assist system. If there is no sensor there, and you only have sensors on the flat rear face of the bumper, you have the standard 4-sensor system.
Can I install a 6-sensor bumper on my 4-sensor car?
No, this is not recommended. The vehicle's Parking Aid Module (PAM) is programmed for a specific number of sensors. Installing a 6-sensor bumper on a car equipped for 4 will leave two sensors disconnected, likely causing a system fault error on the dashboard. The reverse is also true.
Do used bumpers come painted?
Yes, a used OEM bumper will be in its original factory color. You may be able to find one that matches your vehicle, saving you the cost of painting. However, expect minor scratches or scuffs from normal use. New OEM or aftermarket bumpers are typically sold with only a primer coat and will always require painting.
My parking sensors stopped working after a minor bump, but the bumper looks fine. What could be wrong?
Even a small impact can cause problems. The force could have dislodged a sensor from its mounting bracket, damaged the delicate wiring harness running inside the bumper, or cracked an internal component of the sensor itself. In some cases, the impact can damage the Blind Spot Monitoring module mounted behind the bumper cover. A diagnostic scan with a Land Rover-specific tool can help pinpoint which sensor or component is at fault.
Technical Specifications
OEM Part Numbers: LR036693 LR038771 LR053740 LR056298 LR057290 LR057291
Material: Plastic composite. Variants exist for 4-sensor (standard park assist) and 6-sensor (automatic park assist) systems.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Land Rover Range Rover:
- Key Differences: Standard vs. Automatic Park Assist
- Standard Park Assist (4-Sensor System)
- Automatic Park Assist (6-Sensor System)
- Symptoms of Failure
- Known Issues, TSBs, and Recalls
- Buying a Used Bumper Assy, Rear
- Verification Checklist:
- Cost Comparison
- Replacement Overview
- Frequently Asked Questions
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