Ignitions and Electrical› Ignition Components

NGK

ZGR5A Spark Plug, 14mm Thread, 19mm Reach

$19.05

SKU: 12129061869.NGK

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INSTALL DIFFICULTY
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Overview

The NGK ZGR5A spark plug is an OEM-quality ignition component designed for specific classic BMW engines. It features a 14mm thread diameter, 19mm reach, and a v-cut center electrode that promotes efficient spark development for reliable engine ignition and consistent performance.
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The NGK ZGR5A spark plug is an OEM-specification ignition component engineered to restore peak engine efficiency in classic BMW vehicles equipped with M20 and M30 engines. This spark plug features a 14mm thread diameter, a 19mm reach, a 21mm hex size, and a flat seat design. Its construction includes a 5k Ohm resistor and an extra-projected tip with a unique V-cut center electrode, which directs the spark to the edge of the electrode to facilitate faster, more rapid combustion compared to traditional designs. Regular replacement of worn spark plugs is critical to preventing common failure symptoms such as misfiring, check engine lights, hesitation, power loss, and poor fuel economy caused by electrode deposits. For optimal results, these spark plugs should be installed according to the manufacturer's suggested service intervals, using a torque specification of 18-25.3 lb-ft for cast iron heads or 18-21.6 lb-ft for aluminum heads. Compatibility is specific to older BMW models, including the E30 325 series (325, 325e, 325es, 325i, 325is, 325iX), E34 5-series (525i, 535i), E28 528e, E24 635CSi, and E32 735i/iL. This component is designed as a direct replacement for BMW OE part number 12129061869. Please use the vehicle selection tool to confirm exact fitment, as this plug is not intended for all BMW engine configurations.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

BrandNGK
Part Number12129061869.NGK
CategoryIgnitions and Electrical
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