{"id":16951,"date":"2026-07-22T13:48:03","date_gmt":"2026-07-22T11:48:03","guid":{"rendered":"http:\/\/www.stolkcarparts.com\/?post_type=product&p=16951"},"modified":"2026-09-12T09:51:53","modified_gmt":"2026-09-12T07:51:53","slug":"spark-plug-mercedes-w113-w121-w123","status":"publish","type":"product","link":"https:\/\/www.stolkcarparts.com\/en\/product\/bougie-mercedes-w113-w121-w123\/","title":{"rendered":"Spark plug \u2013 Mercedes W113 W121 W198 W111 W112 W108 W109 W123 W114"},"content":{"rendered":"

NGK spark plug \u2013 affordable alternative to Bosch WR5DC \/ WR5DC+<\/strong><\/p>\n

This NGK spark plug is a high-quality and affordable replacement for the original Bosch WR5DC \/ WR5DC+ spark plugs with Mercedes OEM number A0031591403 \/ 0031591403. NGK is one of the world's leading spark plug manufacturers and is known for consistent quality, reliable ignition, and a long service life.<\/p>\n

This spark plug is an excellent alternative to the original Bosch spark plug and is suitable for a large number of classic Mercedes models from the 50s, 60s, 70s, and 80s.<\/p>\n

Suitable for Mercedes models<\/strong><\/p>\n

\u2022 Mercedes W121 190 SL<\/p>\n

\u2022 Mercedes W128 220 SE Ponton<\/p>\n

\u2022 Mercedes W198 300 SL Gullwing
\n\u2022 Mercedes W198 300 SL Roadster<\/p>\n

\u2022 Mercedes W111 220 SEb Sedan
\n\u2022 Mercedes W111 220 SEb Coup\u00e9
\n\u2022 Mercedes W111 280 SE Coup\u00e9
\n\u2022 Mercedes W111 280 SE 3.5 Coup\u00e9
\n\u2022 Mercedes W111 280 SE 3.5 Cabriolet<\/p>\n

\u2022 Mercedes W113 230 SL Pagoda
\n\u2022 Mercedes W113 250 SL Pagoda
\n\u2022 Mercedes W113 280 SL Pagoda<\/p>\n

\u2022 Mercedes W108 280 S
\n\u2022 Mercedes W108 280 SE
\n\u2022 Mercedes W108 280 SEL
\n\u2022 Mercedes W108 280 SE 3.5
\n\u2022 Mercedes W108 280 SEL 3.5<\/p>\n

\u2022 Mercedes W109 300 SEL<\/p>\n

\u2022 Mercedes W114 230.6
\n\u2022 Mercedes W114 250
\n\u2022 Mercedes W114 250 C
\n\u2022 Mercedes W114 250 CE<\/p>\n

\u2022 Mercedes W123 250 Sedan
\n\u2022 Mercedes S123 250 T<\/p>\n

\u2022 Mercedes W460 230 G
\n\u2022 Mercedes W460 230 G Cabriolet<\/p>\n

Suitable for Mercedes engines<\/strong><\/p>\n

\u2022 M114
\n\u2022 M115
\n\u2022 M123
\n\u2022 M127
\n\u2022 M129
\n\u2022 M130
\n\u2022 M198<\/p>\n

OEM references<\/strong><\/p>\n

Mercedes<\/strong><\/p>\n

\u2022 A0031591403
\n\u2022 0031591403<\/p>\n

Bosch<\/strong><\/p>\n

\u2022 WR5DC
\n\u2022 WR5DC+<\/p>\n

Specifications<\/strong><\/p>\n

    \n
  1. Part: NGK spark plug.<\/li>\n
  2. Affordable alternative to Bosch WR5DC and WR5DC+.<\/li>\n
  3. Mercedes OEM: A0031591403 \/ 0031591403.<\/li>\n
  4. Suitable for M114, M115, M123, M127, M129, M130, and M198 engines.<\/li>\n
  5. Ensures reliable ignition, smooth engine operation, and optimal combustion.<\/li>\n
  6. Suitable for the Mercedes models mentioned above.<\/li>\n<\/ol>\n

    Important<\/strong><\/p>\n

    Always check new spark plugs for transport damage before installation. Dented packaging may indicate that the ceramic insulator part has sustained a hairline crack. Damaged ceramic can come loose during use and cause serious engine damage.<\/p>\n

    Always check the prescribed electrode gap before installation. Even new spark plugs may have a deviating electrode gap during transport or storage. If necessary, carefully adjust the gap according to Mercedes factory specifications.<\/p>\n

    We recommend replacing spark plugs preventively every 8 years or 30,000 kilometers, whichever comes first. Even in vehicles that are driven infrequently, the electrodes and insulation material can deteriorate due to aging, which can lead to a weaker spark, rough engine operation, higher fuel consumption, and reduced cold starting performance.<\/p>\n

    For optimal performance, we recommend always replacing spark plugs as a complete engine set. Simultaneously check the condition of the spark plug wires, distributor cap, and distributor rotor to prevent voltage loss and ignition malfunctions.<\/p>\n

    Always check before purchase and installation whether the part is suitable and equivalent based on photos, description, and specifications; installed or used parts cannot be returned.<\/p>","protected":false},"excerpt":{"rendered":"

    Spark plug affordable alternative to Bosch WR5DC \/ WR5DC suitable for M114, M115, M123, M127, M129, M130, and M198 engines.<\/strong><\/p>","protected":false},"featured_media":17372,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"rs_blank_template":"","rs_page_bg_color":"","slide_template_v7":""},"product_cat":[1242,2272],"product_tag":[1668,1693,1694,1950,1733,1734,1695,1951,1628,1952,1609,1610,1608,1611,1601,1561,2093,1589,2094],"vehicles":[],"class_list":["post-16951","product","type-product","status-publish","has-post-thumbnail","product_cat-elektrisch-ontsteking-m189-6-cilinder-3-0-w108-109","product_cat-mercedes-motoronderdelen","product_tag-bougie","product_tag-m114","product_tag-m115","product_tag-m123","product_tag-m127","product_tag-m129","product_tag-m130","product_tag-m198","product_tag-mercedes","product_tag-ngk","product_tag-w108","product_tag-w109","product_tag-w111","product_tag-w113","product_tag-w114","product_tag-w123","product_tag-w198","product_tag-w460","product_tag-wr5dc","first","instock","taxable","shipping-taxable","purchasable","product-type-simple","add-to-wishlist-after_add_to_cart"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.stolkcarparts.com\/en\/wp-json\/wp\/v2\/product\/16951","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stolkcarparts.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.stolkcarparts.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.stolkcarparts.com\/en\/wp-json\/wp\/v2\/comments?post=16951"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stolkcarparts.com\/en\/wp-json\/wp\/v2\/media\/17372"}],"wp:attachment":[{"href":"https:\/\/www.stolkcarparts.com\/en\/wp-json\/wp\/v2\/media?parent=16951"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.stolkcarparts.com\/en\/wp-json\/wp\/v2\/product_cat?post=16951"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.stolkcarparts.com\/en\/wp-json\/wp\/v2\/product_tag?post=16951"},{"taxonomy":"vehicles","embeddable":true,"href":"https:\/\/www.stolkcarparts.com\/en\/wp-json\/wp\/v2\/vehicles?post=16951"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}