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GoogleAfter a windshield replacement in California, check three things: that the glass fits and the car behaves as it did before, that you know when it can be driven, and that the invoice carries what state rules already require. Under the Bureau of Automotive Repair rules, a windshield installation invoice must state the adhesive cure time, the date and time the installation was completed and whether the glass is OEM or non-OEM, and a mobile service invoice must also state where the work was done. On the day of the visit, look at the edges and moldings, confirm that wipers, sensors and the driver assistance camera work without warnings, and ask for the calibration result. In the first days, watch for water at the edges, new wind noise and dashboard warnings, and report them to the shop.
A few minutes of checking at the end of the visit is easier than a second appointment later. This guide is written by Mavi Auto Glass, a locally owned, 100% mobile auto glass company based in Roseville that replaces windshields and calibrates driver assistance cameras across Sacramento, Roseville, Rocklin, Folsom, Elk Grove and the rest of Greater Sacramento. It covers what to look at on the day, what the paperwork should say today and from 2027, and what to watch in the following days.
What should look right when the work is finished?
The glass, the features built into it and the parts that were removed to install it. The table shows what to look at and what a problem looks like.
| What to check | What looks right | What to mention to the technician |
|---|---|---|
| Glass and moldings | An even gap all around and moldings that sit flat | A molding that lifts, a corner that sits higher or a visible gap |
| View from the driver’s seat | Straight lines outside stay straight when you move your head | A wave or bend in front of the driver or behind the mirror |
| Wipers and cowl | Wipers park in place and do not touch the molding | A wiper that hits the trim or a loose cowl panel |
| Rain and light sensors | Automatic wipers and headlights respond as before | Wipers that do not react to water or headlights that stay on |
| Driver assistance camera | No warning light or message, and a calibration result if one was done | A lane keeping or collision warning message after the visit |
| Mirror and accessories | The rearview mirror and any toll tag are back in place | A loose mirror or an accessory left out |
| Inside the car | No adhesive on the dashboard, seats or trim | Smudges, glass fragments or a loose trim piece |
A warning light that goes off is not proof that the camera was calibrated, so ask what was done and how. The markings in the corner of the glass identify who made it, as explained in what the codes printed on your windshield mean. Which systems read through the windshield is covered in driver assist features that depend on the windshield camera.
What paperwork should a California glass shop give you?
A written estimate before the work and an invoice after it, with items that are specific to windshields. These come from the Bureau of Automotive Repair rules that apply today (BAR, Write It Right). California’s Motor Vehicle Glass Act, Senate Bill 988, adds duties for glass shops, and under the general rule for bills without an urgency clause they apply from January 1, 2027 (SB 988).
| Document | Required today (BAR) | Added from 2027 (SB 988) |
|---|---|---|
| Estimate | Whether the windshield is OEM or non-OEM, and a notice that the car cannot be driven for a period after installation | Whether the car has driver assistance features, whether the manufacturer recommends calibration and whether the shop will do it |
| Invoice | Adhesive cure time, date and time the installation was completed, OEM or non-OEM, parts and labor itemized | An itemized invoice and a receipt on payment |
| Mobile service invoice | The address where the work was done, or a description of the location | Same as above |
| Calibration | Not a specific invoice item, so ask for the result | Written notice of whether the calibration was successful and, if not, not to rely on the system until it is calibrated |
Work done at no charge or paid by insurance still belongs on the invoice. Under SB 988, a text message or an email counts as written notice.
How do you check the windshield on the day of the replacement?
Walk around the car, then check the features from the driver’s seat. If you only handed over the keys at the start, do it when you get back to the car, in 5 steps.
- Look at the edges from outside: the gap and the moldings should look the same on both sides and along the top.
- Look through the glass from the driver’s seat: pick a straight line outside, such as a roof edge, and move your head slowly; it should not wave or bend.
- Check the dashboard: with the ignition on, look for any driver assistance warning light or message.
- Test the features: if your car has automatic wipers or headlights, confirm they respond as they did before.
- Read the invoice: find the cure time and the completion time, and do not drive until that time has passed.
Most windshield replacements take approximately 1 to 2 hours, and a calibration adds time depending on the vehicle and the method. Who needs to be around during the visit is covered in being there for a mobile windshield replacement.
What should you watch for in the first days?
Signs that something changed with use. These are the ones worth reporting to the shop.
- Water inside the car near the top or the corners of the windshield after rain or a car wash
- A new whistle or wind noise at highway speed
- A rattle from the glass or the trim over bumps
- A driver assistance warning that appears while driving
- Lane keeping that pulls or reacts differently than before
- Automatic wipers or headlights that stop responding
- A molding that starts to lift or move
Follow the technician’s instructions on car washes and on any tape left on the glass, since the timing depends on the adhesive. A leak or wind noise should be inspected first, since the fix can be resealing, removing and reinstalling the glass or, in some cases, replacing it.
Does the warranty cover problems after a replacement?
It depends on the shop’s terms, so ask for them in writing. At Mavi Auto Glass, qualifying auto glass installations carry a lifetime workmanship warranty against installation-related leaks and wind noise. It does not cover new breakage, impacts or damage to the glass, and the ADAS system and the calibration follow the warranty disclosed with the estimate. Learn more about windshield replacement and ADAS static and dynamic calibration, and about claims in insurance claims.
Keeping the records of your windshield replacement
Save the estimate, the invoice and any calibration result in one place, together with the warranty terms. Take a photo of the new windshield and of the marking in its corner. If anything from the lists above appears later, write down when it happens and under which conditions, such as rain, highway speed or a specific warning message, and send it to the shop with photos. If a problem with the work cannot be resolved with the shop, the Bureau of Automotive Repair accepts complaints about auto repair, including windshield replacement.
