QR25DE Engine

QR25DE Engine (Use Kit P/N 23731-6N225)

Sentra (B15)

IMPORTANT
^ THE SENSORS IN THIS KIT ARE DIFFERENT. IT IS CRITICAL THAT EACH SENSOR BE INSTALLED IN THE CORRECT LOCATION. REFER TO "FIGURE A" AND THE ILLUSTRATIONS IN THIS REPAIR SECTION FOR SENSOR LOCATIONS.

^ Each new sensor (within each kit) is contained in a bag. The bag is labeled with the Nissan part number. Keep the sensor in the bag until just before it is installed. The supplier part number is on the face of the sensor. This number starts with "A29-".





^ The Crankshaft and Camshaft Position Sensors in Sensor Kit P/N 23731-6N225 look the same. To help you tell the difference between these sensors, a white paint mark was added to the Crankshaft sensor (see illustration above).

^ The old and new sensors may appear identical, therefore KEEP THEM SEPARATE.

Camshaft Position Sensor Replacement (P/N 23731-6N260/A29-660-AJ0)

1. Record all radio station presets.

2. Disconnect the negative battery cable.





3. Locate the Camshaft Position Sensor (see Figure 5).

4. Disconnect the vehicle wire harness connector from the sensor.

NOTE:
If the connector will not release for you, see Figure B (if applicable).

5. Remove and save the bolt that holds the sensor in place.

6. Remove the Camshaft Position Sensor with a pulling and twisting motion. Then, using a pair of pliers, break the connector on the OLD sensor so it cannot be reused.

7. Clean the hole that the old sensor was removed from.

8. Open the kit bag, remove the NEW sensor and apply a thin coat of clean engine oil to the 0-ring on the new sensor.

9. Insert (until fully seated) the NEW sensor into the hole with a pushing and twisting motion, being careful not to damage the 0-ring.

10. Re-install and tighten the sensor mounting bolt to 48 - 65 in-lb (5.4 - 7.3 N-m, 0.55 - 0.75 kg-m).

11. Re-connect the vehicle wire harness connector to the sensor.

Crankshaft Position Sensor* Replacement (P/N 23731-6N265/A29-660-AJ1)





* This sensor has a white paint mark on it (see Figure 6).

1. Raise the vehicle on a hoist.

2. Locate the Crankshaft Position Sensor (see Figure 6).

3. Disconnect the vehicle wire harness connector from the sensor.

NOTE:
If the connector will not release for you, see Figure B (if applicable).

4. Remove and save the bolt that holds the sensor in place.

5. Remove the Crankshaft Position Sensor with a pulling and twisting motion. Then, using a pair of pliers, break the connector on the OLD sensor so it cannot be reused.

6. Clean the hole that the old sensor was removed from.

7. Open the kit bag, remove the NEW sensor and apply a thin coat of clean engine oil to the 0-ring on the new sensor.

8. Insert (until fully seated) the NEW sensor into the hole with a pushing and twisting motion, being careful not to damage the 0-ring.

9. Re-install and tighten the sensor mounting bolt to 48 - 65 in-lb (5.4 - 7.3 N-m, 0.55 - 0.75 kg-m).

10. Re-connect the vehicle wire harness connector to the sensor.

11. Lower the vehicle to the ground.

12. Reconnect the battery cable and reset the radio station presets and clock.

Altima (L31)

IMPORTANT
^ THE SENSORS IN THIS KIT ARE DIFFERENT. IT IS CRITICAL THAT EACH SENSOR BE INSTALLED IN THE CORRECT LOCATION. REFER TO "FIGURE A" AND THE ILLUSTRATIONS IN THIS REPAIR SECTION FOR SENSOR LOCATIONS.

^ Each new sensor (within each kit) is contained in a bag. The bag is labeled with the Nissan part number. Keep the sensor in the bag until just before it is installed. The supplier part number is on the face of the sensor. This number starts with "A29-".

^ The Crankshaft and Camshaft Position Sensors in Sensor Kit P/N 23731-6N225 look the same. To help you tell the difference between these sensors, a white paint mark was added to the Crankshaft sensor (see the illustration at the beginning of this first procedure).

^ The old and new sensors may appear identical, therefore KEEP THEM SEPARATE.

Camshaft & Crankshaft* Position Sensor Replacement





* This sensor has a white paint mark on it (see Figure 7).

1. Record all radio station presets.

2. Disconnect the negative battery cable.

3. Locate the Camshaft Position Sensor and Crankshaft Position Sensor (see Figure 7).

4. Disconnect the vehicle wire harness connector from the sensors.

NOTE:
If the connector will not release for you, see Figure B (if applicable).

5. Remove and save the bolt that holds the sensors in place.

Camshaft Position Sensor (P/N 23731-6N260/A29-660-AJ0)

6. Remove the Camshaft Position Sensor with a pulling and twisting motion. Then, using a pair of pliers, break the connector on the OLD sensor so it cannot be reused.

7. Clean the hole that the old sensor was removed from.

8. Open the kit bag, remove the NEW sensor and apply a thin coat of clean engine oil to the 0-ring on the new sensor.

9. Insert (until fully seated) the NEW sensors into the hole with a pushing and twisting motion, being careful not to damage the 0-ring.

Crankshaft Position Sensor* (P/N 23731-6N265/A29-660-AJ1)

* This sensor has a white paint mark on it (see Figure 7).

10. Remove the Crankshaft Position Sensor with a pulling and twisting motion. Then, using a pair of pliers, break the connector on the OLD sensor so it cannot be reused.

11. Clean the hole that the old sensor was removed from.

12. Open the kit bag, remove the NEW sensor and apply a thin coat of clean engine oil to the 0-ring on the new sensor.

13. Insert (until fully seated) the NEW sensors into the hole with a pushing and twisting motion, being careful not to damage the 0-ring.

14. Re-install and tighten the sensor mounting bolts to 48 - 65 in-lb (5.4 - 7.3 N-m, 0.55 - 0.75 kg-m).

15. Re-connect the vehicle wire harness connectors to the sensors.

16. Reconnect the battery cable and reset the radio station presets and clock.