








🚗 Elevate your ride with Marsflex – where precision meets power!
The Marsflex O2 Oxygen Sensor 234-4668 is a durable, OE-spec upstream sensor compatible with a wide range of Chevy, GMC, Cadillac, Pontiac, and Buick models. Designed to improve engine performance, fuel economy, and catalytic converter longevity, it features a fast 22-second response time, operates across a broad temperature range (150°C to 930°C), and delivers reliable electrical signals with a 0.95A current rating. Easy to install and backed by a 1-year warranty, this sensor ensures your vehicle runs cleaner and more efficiently.




| Brand | Marsflex |
| Item dimensions L x W x H | 6.1 x 4.33 x 2.13 inches |
| Material | 234-4668 2PCS |
| Item Weight | 0.29 Kilograms |
| Style | Upstream |
| Current Rating | 0.95 Amps |
| Lower Temperature Rating | 150 Degrees Celsius |
| Maximum Supply Voltage | 12 Volts |
| Measurement Accuracy | Go & No-go Gauge |
| Measuring Range | λ=0.7- ∞ |
| Mounting Type | Flange Mount |
| Output Type | electrical signal |
| Response Time | 22 seconds |
| Sensing Distance | 1000 Millimeters |
| Specific Uses For Product | Oxygen Sensor |
| Upper Temperature Rating | 930 Degrees Celsius |
| Manufacturer | Marsmotor |
| Item Weight | 10.2 ounces |
| Product Dimensions | 6.1 x 4.33 x 2.13 inches |
| Item model number | APEL14001A |
| Manufacturer Part Number | APEL14001A |
| Wattage | 12 watts |
M**N
works
works, removed engine light, 2013 tahoe
H**G
It fits
It was good and it fits
D**N
Failed within a week
After I installed these, my engine light went off and all was good for about 20 miles. Then, both sensors failed within a week and sent engine codes. I had to replace them with a different brand, which worked fine, and the engine light went off and stayed off...so far. I will update when I get more miles on the truck. I'm outside the return window, so I have to eat the cost of faulty sensors. Bummer!
E**S
Good price
Working good for me
D**E
They're ok
They don't hold up compared to OEM but do the job
R**E
The right parts
Work as expected.... light went out....fair price...
G**N
Great deal
Perfect fit. Great deal.
J**.
Perfect Fit
Perfect fit for my 2003 Chevy Avalanche and my 2005 Chevy Tahoe 5.3 L V8 upstream and Downstream sensors.Easy to install. Engine running great now with no misfiring. Great Price!! For the pair cost 75% less than auto parts store . I bought two of the two pack and replaced all 4 on my vehicle.
Trustpilot
2 months ago
3 weeks ago