On VAZ engines, this is known to be fuel injection in several versions. Say, in order to satisfy Euro II toxicity standards, a catalytic converter with the necessary “application” is installed in the exhaust system - an oxygen sensor (lambda probe).
The latter are already four options (the technique does not stand still). The owners of front-wheel drive VAZ cars equipped with the engine control system from GM or our “January-4” got to know the very first. The sensor here (manufactured by AC) is a four-wire heater. A distinctive feature is the bracket of the "negative" wire mounted on the sensor housing. Power of a heating element is 12 W. Today it is not easy to find these sensors for sale, instead of them others are of the same company, but with a “mass” wire fixed inside the case (photo 1).
The GM system was replaced by Bosch. Naturally, with its oxygen sensor. It is not interchangeable with the previous one, although their electrical connectors are the same. Photo 2 shows the LSH-25 sensor numbered 0258005133 from Bosch. It is part of the Bosch MP7.0 and M1.5.4 engine control systems, as well as January-5.1 and VS-5.1. Today it is the most common. The power of the heating element is 18 watts. The Boshevsky heating control algorithm differs from that in the GM system, hence the non-interchangeability of sensors. If LSH-25 is installed instead of the AC, the engine management system will fix the error and record the malfunction code.
The third option is the LSH sensor under the number 0258005247 (photo 3). It is installed in the exhaust system after the catalytic converter on Euro III engines. The sensor controls the composition of the exhaust gases at the outlet of the converter - evaluates the efficiency of the latter. It is impossible to confuse it with the 133rd, although the thread is the same - the 247th has a different connector and a different tip design (photo 4).
