This high-quality new oxygen sensor with part numbers F01R00C034 and 0258010004 perfectly fits Besturn vehicles. It is a key exhaust system component that precisely monitors oxygen concentration in exhaust gas. It helps optimize fuel combustion, reduce emissions and improve overall engine running efficiency. Adopting durable high-temperature resistant materials, it maintains stable performance. Made to standard specs, it is an ideal replacement for old or faulty original oxygen sensors.