1. Overview
The KOHLER 1133070 Bumper Service Kit is designed as a genuine replacement part for Kohler toilet seats. These bumpers are essential for providing stability and preventing direct contact between the toilet seat and the ceramic bowl, reducing wear and noise. This kit ensures your toilet seat functions correctly and maintains its intended position.
1.1. What's in the Box
- BUMPER, SERVICE KIT (Quantity as supplied by manufacturer, typically a pair)
2. Installation
Installing the KOHLER 1133070 Bumper Service Kit is a straightforward process. No special tools or adhesives are typically required. Ensure the toilet seat is clean and dry before installation.
2.1. Installation Steps
- Identify Bumper Locations: Locate the existing bumper recesses on the underside of your Kohler toilet seat. If replacing old bumpers, gently remove any remaining pieces from these recesses.
- Clean the Area: Clean the bumper recesses thoroughly to remove any dirt, debris, or residue. Ensure the area is completely dry before proceeding.
- Insert New Bumpers: Align the new KOHLER 1133070 bumpers with the clean recesses. Apply firm, even pressure to "pop" or press the bumpers into place. They should fit snugly without the need for adhesive.
- Verify Secure Fit: Once installed, gently tug on each bumper to ensure it is securely seated and will not easily dislodge during normal use.

Image 2.1: A pair of white KOHLER 1133070 toilet seat bumpers, designed to fit into designated recesses on the underside of Kohler toilet seats, providing cushioning and stability.
3. Function and Usage
The KOHLER 1133070 bumpers serve a critical role in the proper functioning of your toilet seat. They provide a stable contact point between the toilet seat and the ceramic bowl, preventing the seat from shifting or sliding during use. This stability also helps to protect both the toilet seat and the bowl from potential damage due to impact, and reduces noise when the seat is lowered.
Properly installed bumpers ensure a consistent gap between the seat and the bowl, contributing to the overall longevity and comfort of your toilet fixture.
4. Maintenance
Regular maintenance of your toilet seat bumpers can extend their lifespan and ensure continued performance.
- Cleaning: Clean the bumpers regularly with mild soap and water. Avoid abrasive cleaners or harsh chemicals, as these can degrade the material over time.
- Inspection: Periodically inspect the bumpers for signs of wear, cracking, or compression. If bumpers appear worn or are no longer providing adequate support, they should be replaced to prevent damage to the toilet seat or bowl.
- Secure Fit: Occasionally check that the bumpers remain securely seated in their recesses. If a bumper becomes loose, re-insert it firmly.
5. Troubleshooting
Here are solutions to common issues you might encounter with your toilet seat bumpers:
| Issue | Possible Cause | Solution |
|---|---|---|
| Toilet seat slides or shifts | Worn, missing, or improperly installed bumpers. | Inspect all bumpers. Replace any worn or missing bumpers with new KOHLER 1133070 bumpers. Ensure all bumpers are firmly pressed into their recesses. |
| Bumper falls out of seat | Bumper not fully seated or recess is dirty. | Clean the bumper recess thoroughly. Re-insert the bumper, ensuring it "pops" securely into place. If the bumper is damaged, replace it. |
| Seat makes noise when lowered | Worn or missing bumpers, or uneven contact. | Check all bumpers for wear and secure fit. Replace as needed. Ensure the toilet seat hinges are also properly tightened. |
6. Specifications
- Model Number: 1133070
- Brand: Kohler
- Material: Plastic (commonly used for toilet seat bumpers)
- Color: White (as depicted, compatible with Vikrell Swirl toilet seats)
- Product Dimensions (approximate, per bumper): 1.5" (Length) x 0.75" (Width) x 0.3" (Height)
- Item Weight (approximate, for the kit): 0.176 ounces
- Country Of Origin: China
- UPC: 650531965103
7. Warranty and Support
As a genuine Kohler part, this bumper service kit is subject to Kohler's standard warranty terms for replacement parts. For specific warranty details, claims, or technical assistance, please contact Kohler Customer Service directly.
You can typically find contact information for Kohler Customer Service on their official website or through the documentation provided with your original Kohler toilet seat or fixture.
Kohler Official Website: www.kohler.com





