1. Introduction
Thank you for choosing the Denash Washer Bottle Cap. This product is a high-quality replacement part designed to ensure the proper sealing of your vehicle's windshield washer fluid reservoir. Manufactured with stable characteristics and high reliability, it is engineered to match original factory specifications for a perfect fit and long-term use.
2. Product Overview
The Denash Washer Bottle Cap is a durable plastic component that secures the washer fluid in its reservoir, preventing leaks and contamination. Its design incorporates a visual indicator for the washer function, ensuring easy identification.

Figure 2.1: Top view of the Denash Washer Bottle Cap, showing the integrated windshield washer icon.

Figure 2.2: Underside view of the Denash Washer Bottle Cap, highlighting the internal sealing ring.
3. Features
- High Quality: Brand new and manufactured to high standards.
- OEM Specification: Produced according to original factory specifications for a precise fit.
- Perfect Match: Designed to be a direct replacement for the original car part.
- Reliable Performance: Exhibits stable characteristics and high reliability.
- OE Number: Replaces OE number 643237.
4. Specifications
| Attribute | Value |
|---|---|
| Material | Plastic |
| Color | Blue |
| OE Number | 643237 |
| Package Weight | Approx. 10 grams |
| Product Dimensions (L x W x H) | 8 x 6 x 1 cm |
| Model Number | Denash6pxofnu8at |
| Manufacturer | Denash |
| Country of Origin | China |
5. Compatibility
This Denash Washer Bottle Cap (OE 643237) is compatible with the following vehicle models:
- C5
- C6
- 407
- 3008
- 5008

Figure 5.1: The washer bottle cap shown in context with a compatible vehicle.
6. Setup / Installation
Installation of the Denash Washer Bottle Cap is a straightforward process. Ensure your vehicle is parked on a level surface and the engine is off before proceeding.
- Locate the Washer Fluid Reservoir: Open your vehicle's hood and identify the windshield washer fluid reservoir. It typically has a cap with a windshield icon.
- Remove the Old Cap: Carefully twist and pull off the existing washer fluid reservoir cap.
- Install the New Cap: Align the Denash Washer Bottle Cap with the reservoir opening. Push down firmly and twist until it is securely seated. Ensure a tight seal to prevent fluid leakage.
7. Maintenance
The Denash Washer Bottle Cap requires minimal maintenance to ensure its longevity and proper function.
- Cleaning: Periodically wipe the cap clean with a damp cloth to remove any dirt or debris.
- Inspection: Regularly inspect the cap for any signs of wear, cracks, or damage. Replace the cap if any damage is observed to maintain a proper seal.
- Secure Fit: Always ensure the cap is securely tightened after refilling the washer fluid to prevent evaporation or leakage.
8. Troubleshooting
If you encounter any issues with your Denash Washer Bottle Cap, refer to the following common troubleshooting steps:
- Cap Does Not Fit:
- Verify that the OE number 643237 and your vehicle model (C5, C6, 407, 3008, 5008) are compatible.
- Ensure there is no obstruction in the reservoir opening.
- Fluid Leakage:
- Check if the cap is properly aligned and fully tightened.
- Inspect the cap's internal sealing ring for any damage or deformation.
- Ensure the reservoir neck is clean and free of debris that might prevent a proper seal.
9. Warranty and Support
For information regarding warranty, returns, or refunds, please refer to the Amazon return policy applicable at the time of your purchase. Generally, products can be returned within 30 days of receipt for reasons such as change of mind or if the product is defective or damaged.
For further assistance or specific product inquiries, please contact Denash customer support through the seller's contact information available on the Amazon product page.