2004-2008 Cadillac XLR Rear Bumper: A Guide to Parking Sensors, Part Numbers, and Fitment

Symptoms of a Failing Rear Bumper Assembly

Failure of a rear bumper assembly is almost always due to physical impact. Unlike mechanical parts, bumpers don't typically wear out, but they can degrade from environmental exposure over many years. Symptoms are usually obvious on visual inspection.

• Visible Cracks, Scuffs, or Holes: The most common symptom is damage to the outer bumper cover from a collision. Deep cracks can compromise the cover's integrity and cannot be easily repaired.
• Broken or Damaged Mounting Tabs: The plastic tabs that hold the bumper cover to the body are fragile. If they break, the bumper can sag, look misaligned, or feel loose. This is a critical point to check on used parts.
• Poor Fit or Alignment: A noticeable gap between the bumper and the trunk lid or rear quarter panels can indicate a bent reinforcement bar or broken mounting brackets from a previous impact.
• Parking Assist System Malfunctions: If your XLR is equipped with parking sensors, damage to the bumper can push the sensors out of alignment or damage the sensors themselves, causing a "Service Park Assist" message on the driver information center.

Buying a Used 2004-2008 Cadillac XLR Rear Bumper

Due to the rarity and high cost of new OEM parts for the XLR, a quality used bumper assembly is often the best choice. However, there are critical details to verify before you buy.

1. Confirm the Correct Model Years (2004-2008)

The rear bumper assembly is the same for all Cadillac XLR models, including the base and V-series, from 2004, 2005, 2006, 2007, and 2008. The 2009 model year featured a significant facelift that included a new rear fascia design with different exhaust outlets, making it incompatible with earlier models.

2. Crucial: Check for Parking Sensor Holes

The rear park assist system was a common option. Bumper covers were produced in two styles: with and without the round cutouts for the ultrasonic parking sensors. Before purchasing, you must verify if the replacement bumper matches your vehicle's configuration. It is extremely difficult to cleanly add sensor holes to a bumper that was not made for them.

3. US vs. Canadian Market Bumpers (RPO BV7)

Cadillac produced different bumper systems for vehicles originally sold in the United States versus those exported to Canada. Vehicles built for the Canadian market have RPO code BV7, which indicates they have different bumper provisions to meet Canadian safety standards. This difference is in the internal reinforcement bar, not the outer cover. While the covers may be interchangeable, the reinforcement bars are not. Always try to source a bumper from the same market as your vehicle.

4. Physical Inspection Checklist

When inspecting a used bumper assembly, check the following:

• Mounting Tabs: Carefully inspect all mounting points, especially the tabs along the top edge and the connection points in the wheel wells. Ensure they are intact and not cracked.
• Structural Integrity: Flex the bumper cover slightly to check for hidden cracks. A small surface scratch can be painted, but a crack that goes through the plastic cannot be reliably repaired.
• Included Components: A complete assembly should include the outer cover, the foam energy absorber, and the steel reinforcement bar. Confirm which parts are included in the sale.
• Paint Condition: Expect to repaint any used bumper cover. Finding a used part in the correct color and in perfect condition is highly unlikely. Factor the cost of a professional paint job into your budget.

Known Issues, TSBs, and Recalls

There are no recalls or common Technical Service Bulletins (TSBs) specifically for the rear bumper assembly on the 2004-2008 Cadillac XLR. However, owners on forums have noted that the plastic bumper covers can sometimes sag slightly over time, creating a small gap below the taillights, a common issue for some GM vehicles of this era.

While not related to the bumper itself, be aware of NHTSA Safety Recall 04V525000 for 2004-2005 models, which addresses rear brake lines that could be too close to other components, potentially reducing brake performance.

Replacement Overview

Replacing the rear bumper assembly is a moderately difficult job that a skilled DIYer can perform. The process involves basic hand tools and careful handling to avoid scratching paint.

1. Open the trunk and remove the interior trim panel at the rear to access the upper bumper fasteners.
2. Remove upper clips/screws: There are typically five clips under the trim panel that secure the top of the bumper.
3. Remove lower screws: Look underneath the bumper for about six screws holding the bottom edge.
4. Remove wheel well fasteners: Inside each rear wheel well, remove the clips and screws (usually 7mm or 10mm) that attach the fender liner to the bumper. Pull the liner back to access the screws securing the corner of the bumper to the quarter panel.
5. Disconnect wiring: If you have parking sensors or additional lighting, carefully disconnect the wiring harness.
6. Remove the bumper: With a helper, carefully pull the bumper straight back to release it from the side retaining clips and remove it from the vehicle.

Cost Comparison

Prices for the Cadillac XLR are high due to its low production numbers. Expect to pay a premium for parts, even used ones.

OEM Part Numbers

The following is a list of known OEM part numbers associated with the 2004-2008 Cadillac XLR rear bumper assembly. Part numbers can change over time due to revisions. Always verify fitment with the seller using your vehicle's VIN.

• Rear Bumper Reinforcement (Impact Bar): 25919200
• Rear Bumper Impact Absorber/Spacer: 15916595, 15220803, 10345525
• Rear Bumper Cover (Fascia): 12335911, 15916595
• Tow Hook Cover Blank: 12335690

Frequently Asked Questions