







🚀 Upgrade your ride’s brain with Marsflex precision – because every drop of fuel counts!
The Marsflex O2 Oxygen Sensor 234-5107 is a high-performance upstream sensor compatible with a wide range of vehicles including Ford F150, Audi A3, VW models, and more. Featuring aerospace-grade stainless steel housing, a high-temp ceramic core rated up to 950°C, and IP67 dust/water protection, it ensures durability and precision. With a rapid 10-second response time and OE-spec fitment, it optimizes your engine’s air-fuel ratio for improved fuel economy (5-15%) and reduced emissions. Tested for over 10,000 hours and 500 thermal cycles, it offers a lifespan of up to 100,000 km backed by a 12-month warranty.




| Brand | Marsflex |
| Item dimensions L x W x H | 5.91 x 2.17 x 2.17 inches |
| Material | 234-5107 |
| Item Weight | 0.29 Pounds |
| Style | Upstream |
| Current Rating | 2.6 Amps |
| Lower Temperature Rating | 150 Degrees Celsius |
| Maximum Supply Voltage | 12 Volts (DC) |
| Measurement Accuracy | Go & No-go Gauge |
| Measuring Range | λ=0.6- ∞ |
| Mounting Type | Flange Mount |
| Output Type | electrical signal |
| Response Time | 10 seconds |
| Sensing Distance | 1000 Millimeters |
| Specific Uses For Product | Oxygen Sensor |
| Upper Temperature Rating | 930 Degrees Celsius |
| Manufacturer | Marsmotor |
| Item Weight | 4.6 ounces |
| Product Dimensions | 5.91 x 2.17 x 2.17 inches |
| Country of Origin | China |
| Item model number | APEL14025 |
| Manufacturer Part Number | APEL14025 |
| Wattage | 7.5 watts |
J**A
Excelent
works great
E**R
Excellent
Check engine light:This
C**7
They Work
They fit my 2010 F-150
M**T
Fits 2014 Hyundai Veloster
Fit and worked with my Veloster. Went from 16-21 MPG to 26-40 MPG. Get a blue flame torch and a 7/8" 12 point wrench to take the old o2 sensor off, nearly stripped it using every other method. You'll also need a special tool to put this on.
M**A
Fits 2015 Ford expedition but little short
Ordered this for 2015 Ford Expedition, the wire length was shorter than the original one, it fits but a little tight run
S**N
Didn't work
Just because it says it fits, doesn't mean it will work properly. I was getting intermittent non-read faults with my old sensor, so I needed to replace it. This one is a type of universal, and had to remove a keyed piece from inside the plug (an easy break-away piece designed for such installs). Upon getting it installed, I noticed that the parked idle was about 300 RPMs higher than normal (thought maybe the ECU was learning it). Go for a drive, and the CEL would flash and go out multiple times. Also, the dash estimated fuel mileage was reading 60.0 and increasing (on a car that normally gets low 30s).I got the car home, put the old sensor back in, and the new issues went away.So, if you drive a Hyundai, I DO NOT recommend this replacement sensor.
J**S
Works perfect
The oxygen sensor worked perfect on my Ford F-150 EcoBoost. It was easy to install and the quality was great. It was every bit as good as the OEM sensor but costs a lot less. Thanks 👍
F**P
Works great
So far , so good! My truck has a lot more acceleration power off the jump. Has power like my old 18 Limited had. A++
Trustpilot
3 weeks ago
2 weeks ago