Dorman - HELP Headlight Adjusting Screw P/N:42161
Replace a stripped, broken or missing adjuster with the Dorman headlight adjusting screw, part number 42125 from the Dorman - HELP line. It lets you set the headlamp's aim and hold it there. It fits many vehicles, among them the 1975-1979 Buick Skylark, 1976 Pontiac Ventura and 1973-1975 Buick Apollo. See the "Vehicles it fits" section for the full list of applications and engine details.
A headlight adjusting screw is turned to move the headlamp and set the aim of the beam. Signs this part may need replacing include:
If a worn or damaged screw is the cause, this part replaces it. After installation, check and set headlamp aim following the vehicle's service information.
Interchange: 1235816 · 1493541 · 421252
This part cross-references / interchanges with the following part numbers:
What does a headlight adjusting screw do?
It sets the headlamp's aim. Turning the screw moves the headlamp so the beam can be pointed where the vehicle's service information calls for.
Will this Dorman screw fit a 1975-1979 Buick Skylark?
Yes. The 1975-1979 Buick Skylark is among the listed applications, along with the 1976 Pontiac Ventura and the 1973-1975 Buick Apollo. Check the "Vehicles it fits" section for your exact vehicle.
What are signs a headlight adjusting screw may need replacing?
Look for a headlamp that won't hold its aim, sits loose, or doesn't move when the adjuster is turned, or a screw that is broken or missing. Diagnose the cause first, since other mounting parts can also be at fault.
Is it designed to match the original part?
Yes. Dorman designs it to match the original part's fit and function on the listed applications, and builds it from quality materials for reliable performance.
Should I re-aim the headlights after installing it?
It's a good idea to check headlamp aim after installation. Follow the vehicle's service information for the correct procedure and specifications.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.