Product Description
★ Technical Specifications
Condition: NEW
Placement on Vehicle: Front
★ Replacing OE#
XL3Z3A788AA, XL3Z-3A788-AA, XL3Z 3A788 AA
★ Fitment
For 1999-2003 Ford F-150
For 2004 Ford F-150 Heritage
For 1999 Ford F-250
★ Product Highlights
-Compatibility with Compatible Vehicles
The auto hub lock vacuum check valve line elbow is compatible with compatible vehicles, helping to improve assembly smoothness.
-Pipeline Steering Assistance
Assists in realizing the steering layout of vacuum pipelines, which is helpful for optimizing the rationality of chassis pipeline routing and helps optimize the use feeling.
-Airflow Guidance Assistance
Assists in guiding the transmission direction of vacuum airflow, which is helpful for improving the responsiveness of hub lock vacuum control and helps optimize the use experience.
★ Installation Guide
-Basic Installation Steps
① Turn off the vehicle and cut off power to ensure operational safety.
② Locate the installation position of the auto hub lock vacuum check valve line elbow and remove the old parts and related components.
③ Clean the installation interface area and confirm the new check valve line elbow is compatible with applicable specifications.
④ Align with the installation position for stable assembly to ensure stable connection.
⑤ Check the installation situation and confirm the working condition of the check valve line elbow meets general usage requirements.
!!! THIS INSTALLATION GUIDE IS FOR REFERENCE ONLY. THE ACTUAL INSTALLATION PROCESS SHALL PREVAIL.
-Important Notes
☑ Verify the vacuum check valve line elbow's compatibility parameters before purchase to help with it being compatible with your vehicle.
☑ Check the cleanliness of the interface before installation to help with the smoothness of the assembly process.
☑ Operate the components gently during assembly to help with the check valve line elbow remaining structurally intact and undamaged.
☑ We strongly recommend that installation shall be done by professional people.
★ Why Choose Us
-Clear Product Information
We are committed to providing clear product information to make your shopping experience easier and more convenient.
-Responsive Service Support
We value your feedback and aim to facilitate solutions through attentive communication channels.
★ Package
1×Auto Hub Lock Vacuum Check Valve Line Elbow (As the pictures shown)
★ Frequently Asked Questions
Q: Need to clean the mounting position of the vacuum check valve line elbow before installation?
A: It is recommended to clean the contact surfaces before installation, which will help enhance the mounting fit and usage stability of the component.
Q: Is it hard to install this auto hub lock vacuum check valve line elbow by myself?
A: It involves precise pipeline connection and sealing operation, professional installation is recommended for best results of vacuum transmission function.
Note:
Communication is the best way to solve the problem. If you have any problems after purchasing, please contact us in time, before opening return or case.
Please confirm your Vehicle Identification Number with our part number or interchange part number before ordering.
If not sure, please send me some pictures of your original item & VIN number before ordering.
Professional installation in highly recommended (No instruction included).

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We have no responsibility for shipping address provided wrongly and will not accommodate address change requests.
2.Your purchase will be shipped within 1 day (2-3 days for Saturdays and Sundays). The estimated transit time for the package is 3-5 business days after shipment, depending on the location. We are unable to specify courier services at this time and international shipping services are not currently available.
3.We will ship the item to you with free shipping.