Fitment: for Honda Civic DX, EX, LX 1.6L L4 - Gas 1996; for Honda Civic CX, DX, EX, LX 1.6L L4 - Gas 1997; for Honda Civic CX, DX, EX, GX, LX 1.6L L4 - CNG, 1.6L L4 - Gas 1998; for Honda Civic CX, DX, EX, GX, LX, Value Package 1.6L L4 - CNG, 1.6L L4 - Gas 1999; for Honda Civic CX, DX, EX, GX, LX 1.6L L4 - CNG, 1.6L L4 - Gas 2000 OE Number: 78410-S04-951, 78410S04951 Information: Material: Plastic Metal. Dimension: 152x65x40 mm / 5.98 x 2.56 x 1.57 in (L x W x H); Install Hole Size: 8.4 mm / 0.33 in; Pin Number: 3 Pins Function: Monitors the speed of the automatic transmission input shaft and output shaft to verify the engaged gear and to detect internal slippage in the transmission Use scenarios: - Install or replace on 1996–2000 Honda Civic 1.6L L4 models (Gas or CNG) to ensure correct gear indication during operation. - Use during diagnostic checks to confirm gear engagement when diagnosing shifting issues. - Include in transmission maintenance to monitor shaft speeds and detect potential internal slippage early.