A Makueni nominated MCA was charged with incitement on Monday.
Wiper's Mbula Mutula was arrested earlier in the day after she presented herself at the National Cohesion and Integration Commission offices in Nairobi. She was taken back to the Makueni law courts.
NCIC officers had been looking for her since Thursday. They had camped outside the assembly until late at night but failed to arrest her after she apparently fled.
The charge sheet indicated Mbula is accused of posting an inciting message on her Facebook wall, which was circulated to stir ethnic hatred against another community.
She is said to have committed the offence November 19, 2017, three months after the hotly contested general election.
She denied the charge before senior principal magistrate James Mwaniki.
Mbula was released on Sh400,000 bail.
The case will be mentioned on April 15 and heard on May 28.
The MCA blamed political rivals for her troubles.
“Those using the courts to fight me will not succeed. They are fighting me because of the position I have taken in the assembly to fight corruption,” she told journalists.
She was joined by Kilungu MCA Patrick Mbevi, nominated MCAs Albunus Wambua and Elizabeth Mutindi.
The MCAs were kept out of the court premises by armed Makueni police officers.
Before the case started, the MCAs threatened to storm the court.