Is It Illegal to Put a Tracker on a Vehicle in California? What You Need to Know
Many Californians ask whether it is legal to place a tracking device on a vehicle. The answer depends on specific circumstances and consent. California Penal Code 637.7 establishes clear boundaries regarding electronic tracking devices, and violating these regulations can result in criminal charges, fines, and civil liability. Understanding when vehicle tracking becomes unlawful is essential for employers monitoring company assets, parents concerned about a minor’s safety, and individuals dealing with shared vehicles. This article explains California's electronic tracking law, legal exceptions, penalties for violations, and practical steps to ensure compliance.
California Penal Code 637.7: The Electronic Tracking Law
What the law says
California Penal Code Section 637.7(a) states: "No person or entity in this state shall use an electronic tracking device to determine the location or movement of a person" [1]. This prohibition applies equally to individuals, businesses, corporations, associations, and partnerships. The statute answers a common question: placing a tracker to monitor someone’s movements without proper consent generally violates California law.
The law provides two specific exceptions. First, tracking is permitted when the registered owner, lessor, or lessee of a vehicle has consented to the use of the electronic tracking device with respect to that vehicle [1]. Second, law enforcement agencies can lawfully use electronic tracking devices [1]. For the vehicle-owner exception, consent should be documented in writing. Rental companies must also disclose tracking practices in signed agreements and applicable employee policies.
A violation constitutes a misdemeanor offense [1]. For businesses, firms, companies, associations, partnerships, or corporations licensed under Division 3 of the Business and Professions Code, a violation creates grounds for revocation of the business license [1]. The statute also connects to California's constitutional right to privacy, recognizing that knowledge of a person's activities, such as doctors' visits, meetings with attorneys, and attendance at religious services, may violate constitutional privacy protections [3].
What qualifies as an electronic tracking device
The statute defines "electronic tracking device" as "any device attached to a vehicle or other movable thing that reveals its location or movement by the transmission of electronic signals" [1]. This definition encompasses GPS devices, AirTags, geolocation devices, and similar technologies [2]. The definition extends beyond cars and trucks to include boats, motorcycles, bicycles, golf carts, and even personal property such as backpacks, purses, wallets, and clothing.
Court rulings have clarified what does not qualify under this statute. In the case of Moreno v. San Francisco Bay Area Rapid Transit District (2017), the court reasoned that a cell phone application is not a "device attached" to a cell phone within the meaning of Section 637.7 [1]. The court noted that while a cellphone fits within the category of a moveable thing, a cellphone application is software rather than a physical device. Software is installed on a phone rather than physically attached to it. This reasoning was upheld in In re Google Location History Litigation (2019), which confirmed that a literal attachment (a joining or fastening to something) is required for liability under Section 637.7 [1].
How California differs from other states
California maintains stricter GPS tracking laws than most other states [4]. While many states address GPS issues under anti-stalking statutes, California has a specific tracking-device prohibition that explicitly requires consent for monitoring movements [5]. Similarly, states like Nevada, Maryland, North Carolina, New Jersey, and New York also typically require the tracked person's consent for GPS monitoring [5].
On the contrary, many states allow vehicle tracking without such explicit consent requirements. California's approach reflects broader privacy protections embedded in the state constitution [2]. The state is one of the few with an explicit constitutional right to privacy, and courts take violations seriously [2]. California's civil penalties can reach up to $5,000 per violation plus actual damages [5], creating financial consequences beyond criminal charges. This combination of criminal misdemeanor classification, potential business license revocation, and substantial civil liability makes California's framework notably more restrictive than states with general anti-stalking provisions alone.
When Vehicle Tracking Is Illegal in California
Tracking without consent
Tracking another person's location or vehicle without consent violates California law, regardless of the relationship between the parties [2]. This prohibition applies whether the tracked person is a spouse, employee, renter, girlfriend, boyfriend, or stranger [4]. In practice, installing a GPS tracker without permission may constitute an unlawful invasion of privacy.
Consider this scenario: David installs tracking devices on his girlfriend Diana's phone, vehicle, and in her purse without her consent or knowledge. David faces three separate violations of Penal Code 637.7(a) [2]. Each unauthorized device may be treated as a separate criminal violation. The law treats private individuals and business entities identically in this regard [2].
Personal vehicles and privacy rights
Personal vehicles represent protected private spaces under California law. Installing a GPS tracker on a vehicle you do not own, without consent from both the registered owner and the person whose movements the device will record, is a misdemeanor under PC 637.7 [4]. Your reason for installing the device holds no legal weight.
The consent requirement is not satisfied merely by ownership interest or access to the vehicle. A person maintains privacy rights in a vehicle they regularly drive, even if they do not hold title to it. This protection extends to all vehicle types, including motorcycles, boats, and golf carts [2].
Shared vehicles and co-ownership issues
Jointly owned vehicles create complex consent questions. A spouse cannot legally place a tracker on a jointly owned vehicle without the other spouse's knowledge and permission [4]. Community property status or having your name on the title does not provide sufficient legal basis for tracking [6].
Because the statute does not clearly address co-owned vehicles, some interpretations suggest that consent from a single registered owner may be sufficient. However, California courts have not fully resolved this issue, and the case law remains limited. California courts have consistently charged individuals who track spouses on shared vehicles [4].
Tracking in domestic relationships
One of the most commonly prosecuted PC 637.7 violations involves placing a tracker on a vehicle regularly driven by a spouse without that person’s knowledge. The People v. Agnelli case illustrates how these prosecutions unfold. Agnelli's case proceeded to trial and resulted in an initial conviction, confirming that law enforcement and prosecutors actively charge these cases [4]. Although the conviction was later reversed because of legal questions involving co-ownership, the case illustrates how aggressively prosecutors may pursue tracking-related charges.
Tracking an adult child without their knowledge also violates the statute [4]. A parent who owns the vehicle may track an adult child only if the parent has both installed the device and informed the adult child of its presence [4]. Secret monitoring of an adult child's movements, even on a parent-owned vehicle, creates legal exposure under PC 637.7 regardless of intent [4].
Notably, illegal tracking devices placed on domestically related persons typically lead to additional criminal charges, such as domestic battery (PC 243(e)(1)) or stalking (PC 646.9) [2].
Legal Exceptions: When You Can Use a Tracker
Employer tracking of company vehicles
Employers have broad legal authority to track vehicles they own. GPS tracking of company-owned vehicles is legal in all 50 states when employees are given proper notice [7]. Courts have consistently upheld this right under property-law principles [7]. The key consideration is ownership. Companies generally may track vehicles they own or lease for legitimate business purposes such as fleet management, route optimization, and theft prevention.
California employers can track company-owned vehicles without employee consent, as long as the owner of the vehicle consents [8]. However, notifying employees and obtaining their consent is the safest practice given the developing legal landscape, particularly with new privacy laws like the California Consumer Privacy Act [8]. Written notice protects employers in termination disputes or wage-and-hour claims [5].
Legal issues become more complicated when employees use company vehicles for personal purposes or take them home after work. Monitoring a company van 24/7 without disclosure creates legal uncertainty if tracking extends into non-work hours or personal activities [7]. Unionized workplaces may require GPS tracking to be negotiated as part of collective bargaining agreements [7].
Law enforcement use
Law enforcement agencies can lawfully use electronic tracking devices under California Penal Code Section 637.7(c). However, police must obtain a tracking-device search warrant before installing GPS devices on vehicles. California law permits courts to issue warrants authorizing GPS tracking for up to 30 days.
To secure a warrant, police must demonstrate that tracking will present evidence that someone has committed a felony, is committing a felony, or that tracking can assist in locating an individual involved in a felony [2]. Police do not have to notify the tracked person until after the tracking period ends. Notification must occur within 10 days after the tracking period concludes [2]. Law enforcement can track for longer than 30 days by showing good cause for an extension, with each extension lasting up to 30 days [2].
Vehicle owner consent
The registered owner, lessor, or lessee of a vehicle can consent to tracking device installation. Ownership provides the legal basis for tracking. If you own the vehicle, you can install a tracker to protect against theft, monitor a rental fleet, track equipment-transport vehicles, or keep tabs on a towed boat or RV [5]. This applies whether you are a private individual, rental business, farmer, or outdoor enthusiast [5].
Parent tracking of minor's vehicle
Parents have broad legal authority to track vehicles they own that their minor children drive [5]. Courts recognize extensive parental control over children, including the right to govern where children go [9]. Children owe a legal duty of obedience to parents [9]. These parental rights remain intact absent instances of parental neglect and abuse [9].
No separate consent from the minor is required when the parent owns the vehicle [5]. The parent-as-owner exception applies even in strict-consent states like California [5]. The vehicle must be titled in the parent's name. If a teen purchased their own car and holds the title, the ownership exception no longer applies [5].
In exceptional circumstances, courts can order tracking devices during parenting time if one parent convinces the court that the other parent risks taking children outside the jurisdiction without consent [10]. Such court-ordered tracking would be the only legal way for an ex-spouse to track during the other parent's parenting time [10].
Penalties and Consequences for Illegal Tracking
Criminal charges and jail time
Violating Penal Code 637.7 constitutes a misdemeanor offense in California [11]. The question of is it illegal to put a tracker on a vehicle carries real criminal consequences. Conviction results in up to six months in county jail for each violation [11]. Because each unauthorized device may constitute a separate offense, multiple trackers can significantly increase potential criminal exposure.
Courts may offer probation as an alternative to incarceration in some cases [12]. A probation sentence lasts one year and includes conditions such as criminal protective orders, restitution fines, and potentially domestic violence classes if the defendant and victim share a domestic relationship [12]. Whether probation is granted depends on criminal history, mitigating or aggravating factors, and negotiated plea agreements [12].
Fines and financial penalties
Courts can assess fines up to $1,000 for each violation [11]. Besides monetary fines, defendants face additional financial obligations including restitution to victims for documented losses [12]. Professional consequences extend beyond direct penalties. Any person, business, firm, company, association, partnership, or corporation licensed under Division 3 of the Business and Professions Code faces license revocation upon conviction [13]. Private investigators, attorneys, and other licensed professionals risk losing their ability to practice [14].
Civil lawsuits and damages
Victims can pursue civil compensation independent of criminal proceedings [15]. California law provides statutory damages of either $5,000 per violation or three times the amount of actual economic damages, whichever amount is higher [16][17]. For instance, a victim could recover $15,000 for three separate tracking device installations based solely on statutory damages, without proving actual economic harm.
Civil claims may include invasion of privacy, intentional infliction of emotional distress, and stalking [15]. Emotional distress damages and punitive damages are available remedies [11].
Impact on restraining orders and family law cases
Courts may issue protective orders prohibiting further contact or surveillance following tracking violations [11]. The overlap between illegal tracking and stalking allegations compounds consequences [11]. Evidence obtained through illegal tracking is considered null and void in courtroom proceedings [10]. Subsequently, such violations can negatively impact custody disputes and family law cases, particularly when tracking occurs during parenting time without court authorization [10].
How to Stay Compliant: Practical Steps
Getting proper consent
Written consent protects you from legal exposure under California's tracking laws. Obtain affirmative consent before collecting any location data [18]. Implied consent is insufficient. Vehicle owners, lessees, and lessors can consent to tracking the vehicle [19]. For shared vehicles, discuss and agree before installing trackers to avoid civil or criminal penalties [6].
Documenting permission
Signed acknowledgment forms can help prevent legal disputes. Include details about data collection methods, storage practices, and intended uses [20]. Keep signed copies in personnel files for employment situations or personal records for family tracking [21]. Proper documentation may help support an employer’s position if a dispute later arises.
What employers need to know
Provide written notice describing specific monitored activities, collected worker data, monitoring frequency, data storage location and retention period, and authorized personnel who can access the information [23]. Track locations only during work hours [24]. Configure systems to stop tracking during non-work hours and breaks [18]. Limit data access to personnel with clear business need [18]. Store tracking information securely while ensuring quick access for employee requests under CCPA [18].
Best practices for family situations
Parents tracking minors should ensure the vehicle title remains in the parent's name [21]. Transparency prevents legal complications even when tracking is legally permitted [25]. For adult children, inform them of tracking device presence regardless of vehicle ownership [23].
Conclusion
California's vehicle tracking laws establish clear boundaries that protect individual privacy while allowing legitimate exceptions. In most situations, consent is the key factor that determines whether vehicle tracking is lawful. Employers can monitor company vehicles, parents can track minors in parent-owned cars, and law enforcement can operate with proper warrants. Outside these limited exceptions, obtaining clear consent is generally the safest way to comply with California law.
Violations carry serious consequences, including criminal misdemeanor charges, substantial fines, and civil liability up to $5,000 per violation. Before installing any tracking device, obtain written consent and document your authorization. This simple step protects you from criminal prosecution and costly legal disputes while respecting California's robust privacy protections.
References
[1] – https://www.justanswer.com/family-law/d2fc6-live-california-place-trackers.html
[2] – https://corporate.findlaw.com/law-library/tracking-your-children-with-gps-do-you-have-the-right.html
[3] – https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=637.7.&lawCode=PEN
[4] – https://answers.justia.com/question/2025/03/06/discovered-hidden-tracking-device-on-e-b-1051755
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