General TPMS Questions

What is a TPMS?

TPMS stands for Tyre Pressure Monitoring System. It monitors tyre pressure and often tyre temperature in real time and alerts you when readings move outside preset limits.

Why is TPMS important for caravans?

Caravans add load and stress to tyres. A slow leak on a trailer tyre can lead to sway, overheating, or catastrophic failure. TPMS provides early warning.

Is TPMS required in Australia?

TPMS is not legally required for caravans in Australia, but it is widely recommended as a safety upgrade for towing setups.

How TPMS Works

How do TPMS sensors measure pressure?

Sensors use a pressure transducer to measure air pressure inside the tyre. Data is transmitted wirelessly to a cabin monitor.

Do TPMS sensors measure temperature?

Many systems also track tyre temperature, which can help detect overheating before failure occurs.

For a deeper technical breakdown, read: How TPMS Sensors Work.

Internal vs External TPMS Sensors

What is the difference?

• External sensors: Attach to valve stems and are easy to replace.
• Internal sensors: Installed inside the tyre and require professional fitting.

Which is better for caravans?

Many caravan owners prefer external sensors because they are easier to install, service, and replace individually.

Compare both types in detail: Internal vs External TPMS Sensors.

Installation & Setup

Can I install TPMS myself?

External TPMS systems are typically DIY friendly. Internal systems require tyre removal.

How long does installation take?

External systems can often be installed and paired in under 30 minutes.

How do I pair new sensors?

Pairing involves assigning each sensor to a wheel position in your monitor. Follow your system’s manual carefully.

Step-by-step instructions: How to Replace a TPMS Sensor.

Troubleshooting & Maintenance

Why is my TPMS sensor not working?

Common causes include battery depletion, signal interference, incorrect pairing, or water ingress.

How long do TPMS sensors last?

Most external sensors last several years depending on conditions and usage.

Can TPMS sensors fail in heavy rain?

Poorly sealed sensors may be vulnerable to water damage. Choose sensors designed for outdoor touring conditions.

Full troubleshooting guide: Why TPMS Sensors Fail & What To Do.

Buying a TPMS for Caravans & 4WDs

What should I look for?

• Compatibility with number of wheels
• Stable signal when towing
• Water resistance
• Clear display and alert settings
• Replaceable sensors

Do I need a repeater for caravans?

Some systems use signal boosters for longer towing setups. Check manufacturer specifications for caravan compatibility.