Spark plugs — general information (BMW X5 E53)

Spark plugs with a triangular "mass" electrode, made with a mounting thread for a 16 mm key. Standard for "M52" engines are F7 LDCR spark plugs from Bosch (Germany), but BKR 6 EK (USA) brands with a gap of 0.7-0.8 mm can be installed.

The gap between the electrodes of the spark plug with a triangular ground electrode is not adjustable. The spark plug replacement interval is 20,000 km.

Resistance of the main components of the ignition system:

• crankshaft speed pulse sensor 1280±128 Ohm;
• cylinder recognition pulse sensor:
• between terminals 1 and 2 - less than 1.0 Ohm;
• between terminals 2 and 3 - more than 10.0 mOhm;
• engine temperature sensor:
• at T = 20±3°C 2.2-2.7 kOhm;
• at T = 80±3°C 0.25-0.30 kOhm;
• incoming air temperature sensor:
• at T = 20±3°C 2.2-2.7 kOhm;
• at T = 50±3°C 0.76–0.91 kOhm.