A relay theft can happen in minutes, without broken glass or forced entry. That’s why many drivers ask, can trackers stop relay theft, or do they only help once a vehicle has already gone? The answer is that it depends on the type of tracker and the level of protection built around it.
Can trackers stop relay theft or only help with recovery?
The short answer is that some trackers can reduce the likelihood of a successful relay theft, while others are mainly there to improve recovery.
Relay theft works by capturing and extending the signal from a keyless entry fob, tricking the vehicle into thinking the key is nearby. If the thieves can unlock the vehicle and start it, they can often drive it away. A standard tracking device does not block that signal or stop the engine from starting and is designed to help you and the monitoring centre locate the vehicle after a theft has occurred.
More sophisticated tracking device like Trackstars S5 iPRO solution, include a no tag/no start feature, preventing the vehicle from starting unless the recognised driver tag is detected, helping to prevent relay theft.
What a tracker can do in a relay theft scenario
It helps to separate prevention from recovery, because both are valuable, but they’re not the same thing.
If a vehicle is fitted with a professionally monitored tracker, the system can identify suspicious movement, location changes or theft events and pass those details to a monitoring team. In a live theft situation, speed matters. The sooner a theft is confirmed, the sooner police can be supported with accurate vehicle location data.
However, if your main concern is stopping thieves you need a no tag/no start feature that raises the protection level by preventing the vehicle from starting without the authentication tag.
This is why insurance-led tracker categories are not just labels. They indicate different levels of theft protection and recovery support. An S7 tracker is typically focused on stolen vehicle tracking and recovery. An S5 system adds driver identification. An S5 iPRO system adds anti-theft functionality designed to disrupt the theft itself.
Why relay theft is a serious risk for keyless cars
Keyless convenience has changed how many people use their vehicles, but it has also created an opportunity for organised thieves. They do not need your keys if they can relay the signal from inside your house to the car on your drive.
That is one reason why relay theft feels so unsettling. Owners can do many things right and still be targeted. Parking carefully, keeping keys away from the front door and using signal-blocking pouches all help, but none of these measures is a guarantee on its own.
For higher-risk vehicles, combining sensible physical precautions with a recognised electronic security system is the strongest method of protection.
Can trackers stop relay theft if thieves use more advanced methods?
Yes, but there are limits. Organised car thieves may use relay equipment, key programming tools, transporters or methods designed to interfere with signals, making it difficult to remove all risk.
No tag/no start can make relay theft far more difficult, but criminals may still attempt other methods. This is why the more complete tracking systems include no tag / no start immobilisation and professionally monitored tracking, to improve theft detection and increase the chances of a rapid recovery if the vehicle is stolen.
That is why credibility and service matter. A professionally installed, Thatcham-approved S5 iPRO tracking system combines theft prevention technology, a recognised monitoring process, fast response and a system built around recovery.
Choosing the right level of protection
For owners of high-value, high-risk or frequently targeted vehicles, stronger anti-theft measures are often worth the extra investment. If your insurer specifies an S5 tracker, or if relay theft is a particular concern, a system with driver recognition or no tag/no start will usually be required. If your vehicle falls into a lower risk category, or your insurer specifies an S7 tracker, a professionally monitored stolen vehicle tracking service will meet your requirements,
Trackstar’s approach reflects this reality, by offering tiered protection levels for different vehicle risks and insurer requirements, all backed by its leading monitoring service and proven recovery focus.