BMW Spark Plug

Part No.: 121 200 405 81

Product Information

Spark plugs are an often overlooked maintenance item. If your BMW has developed a misfire, studders, or feels down on power it could be due to worn-out spark plugs.

Please note?Tightening torque for this spark plug is 23 ? 3 Nm, the gap is preset for OE applications only, a special 14mm, 12 point spark plug socket is required for removal and installation of this plug, please see p/n?83300495560?for the correct tool.

Center electrode core material: Copper
Center electrode tip material: Platinum
Electrical terminal type: Non-removable nut
Ground Configuration: Standard
Ground electrode core material: Copper
Ground electrode quantity: 1
Ground electrode tip design: SPE (Square platinum electrode)
Hex size: 14mm bi-hex (12 point) – see p/n?83300495560?for the correct socket
Thread size: 12×1.25mm
Torque spec: 23 ? 3 Nm (~17 ft-lb)
Insulator Height: 50mm
Manufacturer heat range: 5
Pre-gap size: .031″ (.8mm) – Pregapped for OE applications
Reach: 26.5mm
Resistance: 80000 ohms
Resistor Type: Yes
Seat Type: Flat

Spark Plug

Maintaining your car at suggested service intervals will result in a better performance and improved fuel economy, which is why we suggest changing your spark plugs at the manufacturers suggested service intervals and be sure to check their condition for any warning signs of failure. If your vehicle isn’t operating at peak performance it may be time to replace your spark plugs.

Spark Plug Failure Symptoms

  • Misfiring
  • Check Engine Light
  • Hesitation
  • Loss of Power
  • Poor Fuel Economy

About Genuine BMW

The original parts used by BMW to build your car are available as replacement parts under the ?Genuine BMW? brand. When ordering a Genuine BMW part you are guaranteed to get the same part that you would pick up from your local dealerships part department. Genuine BMW parts have been built to BMW?s stringent standards and are the same quality of the original parts used to build your Ultimate Driving Machine.

You may not realize this, but the parts that make up your BMW are not necessarily manufactured by BMW. No cause for concern, as BMW designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for BMW for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including?Lemforder,?ZF,?Sachs,?Bosch,?Valeo,?Zimmermann,?Siemens VDO,?Corteco, and more. Don?t be surprised to open that Genuine BMW parts box and find an OEM branded part inside, simply with the addition of a BMW logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers.

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