A compact car gauge that displays live air/fuel ratio readings for tuning and routine engine checks. Owners fitting or tuning 12V engines gain reassuring, easy-to-read feedback at a glance with Piousunt Car Air Fuel Ratio Gauge. Is the included narrowband sensor and simple install enough for everyday tuning needs?
⚡ At a Glance
- • Reading Accuracy: Quick AFR indication across a 10.00–20.00 range using a narrowband sensor
- • Best for: Owners and tuners wanting a straightforward AFR readout for 12V cars and modified bikes
- • Not ideal for: Carburettor-equipped engines
52mm black-dial gauge with blue LED backlight and AFR readings from 10.00 to 20.00. Includes a narrowband O2 sensor (OEM 0258006028) and is designed for 12V automotive installations.
Clear night-time readouts - with blue LED-backlit 52mm gauge
Gauge measures 2-1/16" (52mm) and uses a black dial with blue LED backlighting and clearly printed numbers for low-light visibility. Power is standard DC 12V with IGN MAX 0.3A for straightforward dashboard connection.
Bright LED illumination and large numerals make AFR visible while driving or during night-time tuning. Quick visual reference helps avoid guesswork when checking mixture under varied light conditions.
Responsive AFR feedback - with OEM narrowband O2 oxygen sensor
Included narrowband oxygen sensor is OEM 0258006028 with a spiral thread of M18×1.5 and a 22mm wrench size. Output voltage spans a maximum of ≥900mV to a minimum of ≤50mV, running at DC 12V.
Sensor voltage swings give an immediate indication of richer or leaner running, useful for basic tuning and verifying engine condition. User reports confirm readings align well with established AEM AFR gauges.
Straightforward fitment - with M18×1.5 sensor thread and complete kit
Sensor thread specification M18×1.5 matches common oxygen sensor ports and a 22mm wrench fits the supplied sensor. Kit includes the AFR gauge, narrowband sensor and an English manual for installation guidance.
Quick installation for mechanics and competent DIYers on 12V cars, with clear mounting and sensor connections. Included manual and parts reduce the need for extra components at install.
✨ The 4 Key Reasons for Piousunt Car Air Fuel Ratio Gauge
Blue LED backlight - Clear AFR numbers visible during night-time or low light conditions
OEM narrowband sensor (0258006028) - Voltage span gives immediate lean/rich indication while tuning
Universal 12V compatibility - Works with standard 12V car electrical systems for easy hookup
Complete kit with sensor and manual - All necessary parts included for straightforward installation and support
📋 Technical Details at a Glance
- Gauge: 2-1/16" (52mm) black dial with blue LED backlight
- Reading Range: AFR 10.00–20.00
- Display Type: Digital LED-backlit dial
- Oxygen Sensor: Narrowband, OEM 0258006028
- Sensor Thread: M18×1.5
❓ Frequently Asked Questions
Q: Does the gauge work with a standard 12V car electrical system?
A: Yes. Power specification is DC 12V with IGN MAX 0.3A, suitable for all 12V cars.
Q: What sensor is included with the gauge?
A: A narrowband oxygen sensor is included, OEM number 0258006028, with M18×1.5 spiral thread and 22mm wrench size.
Q: Can the display be read at night?
A: Yes. Numbers are clearly printed and the blue LED backlight makes readings easy to see in darkness.
🏆 Our Verdict
Ideal for engine tuners and DIY enthusiasts who need a simple, reliable AFR monitor for 12V vehicles. Narrowband oxygen sensor paired with a clear LED dial gives fast, easy-to-interpret AFR feedback for routine checks and light tuning. Good value for those seeking a complete kit with sensor and after-sales support for straightforward installation and monitoring.
