In order for a 1998 Honda Civic to operate at peak efficiency and reliability, the engine must maintain a very precise air to fuel ratio. The stoicheometric ratio is precisely 14.7 to 1 air to fuel. One of the ways your engine maintains this delicate balance is by measuring the oxygen concentration in your exhaust gases. It measures this by using an oxygen sensor OE connector. In order for the oxygen sensor to operate properly, it must be hooked in to the system using the right Honda Civic oxygen sensor OE connector. If the connector is bad, the whole system will begin to fail. You may notice your engine stuttering, stalling or having a drastic decrease in fuel mileage. You can replace your failing connector with a high quality Bosch Civic oxygen sensor OE connector. Bosch is well known worldwide for making high quality electrical and engine management components, and in many vehicles Bosch components are the stock parts. If a Bosch part is not an OEM replacement, then it will almost certainly be an upgrade. With a Honda Bosch oxygen sensor OE connector, you can be confident that you are installing one of the best possible parts to keep your engine running smoothly. Motor hobbyists completely deserve great customer service when buying quality auto parts for a car or truck. For all our customers, we built an always-online technical help call desk to address your requests. If you can find a better price, give us a call - we will beat any legitimate auto part price.