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GoogleFor most drivers, a qualified mobile auto glass shop is a sound choice for a windshield replacement, as long as it uses the correct glass for your vehicle and completes any calibration the manufacturer recommends. A dealership makes more sense when the glass shop cannot perform or confirm that calibration, or when you want the vehicle brand’s own glass and the dealer can supply it. In California the choice is yours: the Motor Vehicle Glass Act, Senate Bill 988, says an insured’s right to select a glass repair shop or recalibration facility includes independent shops, network and non-network shops, dealerships and qualified specialists.
The real question is not the building but the work: the glass, the calibration and the paperwork you receive. This guide is written by Mavi Auto Glass, a locally owned, 100% mobile auto glass company based in Roseville that replaces windshields and performs ADAS calibration with its own Autel equipment across Sacramento, Rocklin, Folsom, Elk Grove and the rest of Greater Sacramento. It lists what to compare and what to ask either option.
What should you compare between a dealership and a glass shop?
Compare the same items on both quotes. The table shows what to look at and what to ask.
| What to compare | What to ask |
|---|---|
| The glass | Which windshield is identified for my VIN, and is it from an OEM supplier or the vehicle brand? |
| ADAS calibration | Is calibration recommended for my vehicle, who performs it and by which method? |
| Calibration result | Will I get written notice of whether the calibration was successful? |
| Where the work is done | At my home or work, or at your facility, and what does the location need? |
| Warranty | What does the warranty cover and what does it exclude? |
| Invoice | Will I receive an itemized invoice? |
What does California law require from a glass shop on calibration?
Notice before and after. Under SB 988, before the service a glass shop must tell you whether your vehicle has an advanced driver assistance system and whether calibration is recommended by the manufacturer, and whether the shop intends to calibrate it. If it cannot, it must tell you the vehicle should go to a dealership authorized by the manufacturer or a qualified specialist. After a calibration, the shop must give you written notice of whether it was successful (SB 988, Civil Code 1784.53 and 1784.54).
If the calibration is not successful, the shop must advise you not to rely on the driver assistance system until it has been calibrated by a dealership or a qualified specialist. That written result is useful whichever option you choose.
When is the dealership the better choice?
In a few clear situations. Consider the dealership in these cases.
- The glass shop cannot perform the calibration your vehicle needs, or cannot confirm the result
- A calibration was attempted and was not successful
- You want glass sold under the vehicle brand and the dealer can supply it
- The vehicle has other repairs at the dealer that affect the same systems
How does a mobile windshield replacement with calibration work?
It brings the glass and the calibration to where the car is parked, in most cases in one visit. With Mavi Auto Glass it works in 4 steps.
- Vehicle details: you share the year, make, model and a photo of the damage, and the VIN can follow to confirm the exact glass.
- Place and time: you choose where the vehicle will be and a time from the available appointments.
- On-site work: the windshield is replaced and the camera is calibrated when required, with our own Autel equipment.
- Ready to drive: the glass and work area are cleaned and you are told when the vehicle can be driven.
Some calibrations need adequate space, a level surface and suitable weather and road conditions. We use high-quality glass from trusted OEM suppliers, selected for proper fit, optical clarity, durability and safety. Genuine OEM glass is also available upon request and subject to availability. Learn more about windshield replacement and ADAS static and dynamic calibration.
Before you choose where to replace your windshield
Ask both options the same questions about glass, calibration, written results, warranty and invoice, and compare the answers line by line. If you are using insurance, remember that you can choose your shop and your recalibration facility, as explained in choosing your own auto glass shop in California.
