VIN etching most commonly involves the use of a stencil and an acidic etching paste to engrave a vehicle's vehicle identification number (VIN) onto the windshield and windows. Most parts on a vehicle already have at least a partial VIN stamped onto them, and many auto parts buyers will not purchase parts that carry identification numbers. Should a thief try to sell the parts from a vehicle for profit, those marked parts carry a higher risk for both the thief and the auto parts seller. Since automotive glass generally have no identification numbers, and are often interchangeable between many different years and models of vehicle, there is usually a much greater profit for the thief compared to other components on the vehicle. If a car's windows are stamped with the VIN, thieves would need to discard the glass before parting out the stolen vehicle, thus reducing or eliminating their profit. VIN etching can also increase the odds of recovery of a stolen car by police.
Some automobile dealers try to include VIN etching as an extra service to boost their profit margin when selling a car; they may even pre-print a charge for VIN etching on the bill of sale, as if to suggest that VIN etching is mandatory rather than an optional, add-on service. Inflated dealership fees of $200 or $300 for VIN etching are not unheard of. However, consumer advocates note that while some states do require that dealers offer VIN etching, no states require that consumers purchase it from the dealer.
Consumers who want to have the VIN etched on their car windows but are unable to find a free etching service in their area can often save hundreds of dollars over the dealership fee by using a do-it-yourself VIN etching kit purchased from an internet retailer, or a local auto parts dealer, for as little as $20-25.
- Culpeper County Sheriff's Office VIN Etching
- Lehigh University Police Department VIN Etching Program, retrieved May 4, 2010
- Allstate Insurance VIN Etching Fact Sheet
- NBC San Diego - VIN Etching Can Deter Thieves
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- Smith, Dylan. "Police: Free VIN etching can deter thieves". Tucson Sentinel. Retrieved 9 January 2012.
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