Internal vs External TPMS Sensors
Internal vs External TPMS Sensors: Which Is Better?
When choosing a tyre pressure monitoring system (TPMS) for your caravan or 4WD, one of the biggest decisions is internal vs external TPMS sensors. Both monitor pressure and temperature, but they differ in installation, maintenance, cost, and practicality for Australian touring.
Internal vs External TPMS Sensors Comparison
| Feature | External TPMS Sensors | Internal TPMS Sensors |
|---|---|---|
| Installation | DIY, screws onto valve stem | Requires tyre removal |
| Replacement | Simple individual replacement | Professional removal required |
| Water Exposure | Exposed, choose waterproof units | Protected inside tyre |
| Cost per Wheel | Typically lower | Typically higher |
| Best For | Caravans, camper trailers, multi-wheel setups | Factory-style or permanent installs |
External TPMS Sensors
External TPMS sensors screw onto your tyre valve stem and transmit pressure and temperature readings to your monitor.
Advantages
- Quick DIY installation
- Easy to replace individually
- Ideal for dual axle caravans
- No tyre removal required
Considerations
- Exposed to weather and road debris
- Seal maintenance required
Internal TPMS Sensors
Internal sensors are mounted inside the tyre and attached to the rim. They are often fitted during tyre installation.
Advantages
- Protected from external elements
- Less visible externally
Considerations
- Professional installation required
- Tyre must be removed to replace
- Higher fitting cost
Which Is Best for Caravans & 4WD Touring?
For most Australian caravan owners, external TPMS sensors are the practical choice. They are easier to manage, simpler to replace when travelling, and well suited to multi-wheel towing setups.
If you prefer a factory-style installation and do not mind professional fitting, internal sensors may suit your needs.
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