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8446128040 Toyota Prado 150 120 Series KDJ Fuel Filter Water Sensor Switch Genuine
8446128040 Toyota Prado 150 120 Series KDJ Fuel Filter Water Sensor Switch Genuine
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SKU: 8446128040, 8446128041--7z7gda
Genuine Toyota Prado 120/150 Series Fuel Filter Water Sensor Switch
Replace your faulty fuel filter water sensor with this genuine Toyota part. This critical sensor monitors water contamination in your diesel fuel filter and alerts you when water needs to be drained, protecting your Prado's fuel injection system from damage.
✓ What This Sensor Does
The fuel filter water sensor switch serves a vital protective function:
- Detects water in fuel filter - Monitors water accumulation at bottom of filter housing
- Triggers dashboard warning light - Alerts you when water needs to be drained
- Protects fuel system - Prevents water from reaching injectors and causing damage
✓ Vehicle Compatibility
This genuine Toyota fuel filter water sensor fits:
Prado 120 Series:
- KDJ120/KDJ125 (2003-2009) - 1KD-FTV 3.0L Turbo Diesel
Prado 150 Series:
- KDJ150 (2009-2015) - 1KD-FTV 3.0L Turbo Diesel
Land Cruiser 100 Series:
- HDJ100/HDJ101 (1998-2007) - 1HD-FTE 4.2L Turbo Diesel
Years: 1998-2015 (depending on model)
Part Numbers: 8446128040 / 8446128041 / 84461-28040
Signs Your Water Sensor Needs Replacement
A faulty fuel filter water sensor will cause:
- Water warning light always on - Sensor stuck in triggered position
- No water warning light - Sensor not detecting water accumulation
- Intermittent warning light - Faulty electrical connection or sensor
- Check engine light - ECU detecting sensor circuit fault
- Corroded sensor terminals - Water damage to electrical connections
- Broken sensor housing - Physical damage from filter changes
Why Choose Genuine Toyota Sensors?
- Accurate Detection: Precise water level sensing for reliable warnings
- Correct Fit: Exact OEM specifications for proper sealing
- Quality Materials: Corrosion-resistant construction for long life
- Reliable Operation: Consistent performance in all conditions
- Safety Critical: Water in fuel system can cause expensive injector damage
- Easy Integration: Plug-and-play with factory wiring
Product Specifications
- Manufacturer: Toyota (Genuine OEM)
- Part Numbers: 8446128040 / 8446128041
- Application: Fuel filter water sensor switch
- Type: Water detection sensor
- Condition: Brand New
Installation Notes
Easy DIY installation. Sensor screws into bottom of fuel filter housing. Disconnect electrical connector, unscrew old sensor, screw in new sensor, reconnect electrical connector. Installation typically takes 5-10 minutes. Drain water from fuel filter before replacing sensor. Check for fuel leaks after installation.
Installation Tips
- Drain water from fuel filter before removing sensor
- Have a rag ready to catch any fuel spillage
- Do not overtighten - hand tight plus 1/4 turn is sufficient
- Ensure O-ring seal is properly seated
- Clear any fault codes after installation
- Test warning light operation after installation
Important Maintenance Note
This sensor alerts you when water accumulates in your fuel filter. When the warning light comes on, you must drain the water from the fuel filter immediately. Ignoring this warning can lead to water entering your fuel injection system, causing expensive damage to injectors and fuel pump.
Perfect For:
- Replacing faulty or corroded water sensors
- Fixing water warning light issues
- Fuel filter service and maintenance
- Protecting fuel injection system from water damage
- Preventive maintenance during filter changes
- Restoring proper fuel system monitoring
What's Included
- 1x Genuine Toyota Fuel Filter Water Sensor Switch (Part 8446128040)
- O-ring seal (pre-installed)
Shipping & Returns
✓ FREE Worldwide Shipping
✓ Fast dispatch
✓ Secure packaging to ensure safe delivery
✓ 30-day return policy for your peace of mind
Questions about compatibility or installation? Our Prado diesel specialists are here to help. Contact us to confirm this water sensor fits your specific vehicle.
Cerol Auto - Your trusted source for genuine Toyota diesel fuel system components. Protecting your engine from water contamination.
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