SKU: 16400720
GReddy Oil Gallery M18 Warning Sensor Adapter Fitting – Universal
The GReddy 16400720 M18 warning sensor adapter allows safe installation of an oil temperature or pressure warning sensor into the engine’s oil gallery without permanent modification. Machined from billet aluminum with an M18x1.5 male thread and 1/8 PT female sensor port, this fitting includes a built-in restrictor to maintain proper oil flow while providing a reliable mounting point for aftermarket warning sensors on most Japanese engines.
Key Features
- M18x1.5 Male Thread: Direct fit for common oil gallery ports on Toyota, Nissan, Honda, Subaru, and Mitsubishi engines.
- 1/8 PT Female Sensor Port: Accepts most aftermarket oil temp/pressure warning sensors.
- Built-In Restrictor: Precision orifice maintains oil pressure and flow to gallery.
- Billet Aluminum Construction: Lightweight, durable, and corrosion-resistant with black anodized finish.
- O-Ring Seal: Viton O-ring for leak-free installation.
- Hex Drive: 22mm hex for easy installation with standard tools.
- Made in Japan: Manufactured by Trust/GReddy to JDM quality standards.
Product Notes
- Part number: 16400720 (M18 warning sensor adapter).
- Commonly used on 1JZ/2JZ, RB26/RB25, SR20, EJ20/EJ25, 4G63, B16/B18, and many others with M18 oil gallery ports.
- Ideal for installing Defi, Prosport, AEM, or similar warning sensors.
- Not for use with full-size gauges (use sandwich plate or pan adapter instead).
- Length: approximately 30mm overall.
- Weight approximately 50 grams.
Installation Notes
- Remove factory oil gallery plug (M18) and install adapter with supplied O-ring.
- Torque to 25-30 ft-lbs (use thread sealant if desired).
- Route sensor wiring carefully away from heat and moving parts.
- Typical install time 15-30 minutes.
This Part Fits
Universal – fits any engine with M18x1.5 oil gallery port, including:
| Make | Common Engines |
|---|---|
| Toyota | 1JZ-GTE, 2JZ-GTE, 1UZ-FE, 3S-GTE, 4A-GE |
| Nissan | RB20DET, RB25DET, RB26DETT, SR20DET, VG30DETT |
| Subaru | EJ20, EJ25 (WRX/STI) |
| Honda | B16, B18, K20, K24 |
| Mitsubishi | 4G63, 4B11T |
| Mazda | 13B-REW, BP, FS |
Why Choose GReddy?
- Japanese manufacturer with decades of turbocharged engine expertise.
- Precision-machined adapters trusted in high-horsepower JDM builds worldwide.
- Clean, reliable solution for warning sensor installation.
Frequently Asked Questions
- Q: Will this restrict oil flow?
A: No, built-in restrictor maintains factory oil pressure to gallery. - Q: What sensor thread does it accept?
A: 1/8 PT (common on Defi, Prosport, AEM warning sensors). - Q: Does it include the sensor?
A: No, adapter fitting only; sensor sold separately.
Shipping & Handling
- Method: Standard ground shipping.
- Package Weight: Approximately 0.5 lbs.
- Box Dimensions (approx): 6″ × 4″ × 2″.
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