Keyless entry cars are convenient, but many drivers worry about theft methods that target keyless systems. So, what is the best security for keyless entry cars? In most cases, the best approach is layered security — combining signal protection, visible deterrents, and (where appropriate) tracking.
No device can guarantee theft prevention or cheaper insurance. However, reducing theft risk can help protect your vehicle and may support a lower-risk profile in the eyes of some insurers.
This guide explains the best security measures for keyless entry cars, how they work, and what to prioritise.
What Makes Keyless Entry Cars Vulnerable?
Keyless entry systems work by detecting a signal from your key fob when it’s nearby. The car then unlocks and (with keyless start) can be started without inserting a physical key.
The challenge is that criminals may try to exploit the key signal using techniques such as:
- Relay theft (amplifying the signal from your key inside your home)
- Signal jamming (stopping your car locking when you walk away)
- Electronic access methods targeting vehicle systems
This is why the best security usually isn’t one product — it’s a small set of protections that work together.
Best Security for Keyless Entry Cars
1. Faraday Pouch or Faraday Box (Signal Blocking)
What it does
A Faraday pouch (or Faraday box) blocks your key fob signal, helping reduce the risk of relay theft.
Why it helps
- Stops many relay devices from detecting your key
- Easy to use at home
- Low-cost, no installation required
Best practice
- Test the pouch by standing next to your car and checking it won’t unlock or start
- Retest regularly, as shielding can degrade over time
- Keep keys away from doors/windows as an extra layer
View Faraday pouches for car keys on Amazon
2. Steering Wheel Lock (Visible Deterrent)
What it does
A steering wheel lock physically restricts steering movement and acts as a strong visual deterrent.
Why it helps
- Encourages opportunistic thieves to move on
- Adds time and noise to any theft attempt
- Works even if electronic systems are bypassed
Best practice
- Use it consistently (not “just sometimes”)
- Choose a robust model with strong construction
- Fit it in a clearly visible position
View steering wheel locks on Amazon
3. OBD Port Protector (Reduce Key Programming Risk)
What it does
An OBD port protector restricts access to the vehicle’s diagnostic port, which can be used to programme new keys in some theft scenarios.
Why it helps
- Adds a barrier against key programming attacks
- Supports a layered approach (especially for certain models)
Best practice
- Check your vehicle’s OBD port location
- Choose a protector that fits securely and locks reliably
View OBD port protectors on Amazon
4. GPS Tracker (Recovery Support)
What it does
A GPS tracker helps locate a vehicle if it is stolen. Some trackers offer alerts and monitoring via an app or service.
Why it helps
- Can improve recovery chances
- May reduce overall claim costs if recovery is successful
Some insurers may ask about trackers for certain high-value vehicles, but this varies by provider.
View GPS vehicle trackers on Amazon
What’s the Best Combination for Most Drivers?
For many keyless entry car owners, a sensible “baseline” setup is:
- Faraday pouch or box (protect the key signal at home)
- Steering wheel lock (visible deterrent on the vehicle)
Then consider adding:
- OBD port protection if your vehicle is known to be targeted or you want another layer
- GPS tracking if you have a higher-value vehicle or want recovery support
How Insurers View Security for Keyless Entry Cars
Security measures do not guarantee cheaper insurance. However, insurers assess overall risk and may consider security features as part of underwriting, especially for vehicles at higher risk of theft.
What matters most is having the correct cover in place and keeping policy details accurate.
Key Takeaways
- The best security for keyless cars is usually layered security
- Faraday pouches reduce relay theft risk by blocking key signals
- Steering wheel locks add a visible physical deterrent
- OBD protection and trackers can add further security layers
- No security device guarantees theft prevention or cheaper insurance
Frequently Asked Questions
What is the best security for a keyless entry car?
For most drivers, a Faraday pouch (to block key signals) combined with a steering wheel lock (visible deterrent) is a practical starting point.
Do Faraday pouches stop relay theft?
A properly working Faraday pouch can significantly reduce the risk by blocking the key fob signal. Testing is recommended.
Should I buy a Faraday box instead of a pouch?
Faraday boxes are useful for storing keys at home, while pouches are portable. Performance depends on build quality and correct use.
Are trackers worth it for keyless entry cars?
They can be, especially for higher-value vehicles. Trackers may improve recovery chances if theft occurs.
Will extra security reduce my car insurance premium?
There is no guarantee. Premiums depend on many factors, but security can help reduce theft risk.