Parts:
The knock sensor itself is relatively inexpensive, typically costing around $20 to $40.
Labor:
The labor involved in replacing the knock sensor can be more significant, as it may require disassembling and reassembling various engine components to access the sensor. Labor costs can vary, but you can expect to pay around $100 to $200 for the labor involved.
Total Cost:
The total cost of replacing the knock sensor on a 1995 Honda Civic, including both parts and labor, can range from approximately $120 to $240. However, it's always best to get quotes from multiple reputable mechanics or repair shops to ensure you're getting a fair price.