{"product_id":"bosch-ignition-coil-pencil-coil-0221504464-single-oe-grade-silicone-overmolded-boot","title":"Bosch Ignition Coil Pencil Coil 0221504464 — Single OE-Grade, Silicone Overmolded Boot","description":"\u003cp\u003e\u003cstrong\u003eBOSCH 0221504464 is a single OE-grade pencil ignition coil designed to deliver consistent high-voltage spark energy for select BMW and Rolls‑Royce engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis Bosch original equipment ignition coil replaces worn or failed pencil‑style coils and restores reliable ignition performance. Engineered with a molded high‑voltage boot, silicone overmold insulation, and an upgraded pressure‑fit design, this coil aims to reduce misfires, protect against contamination, and match or exceed factory specifications. It replaces OE numbers 00124, 12131712219, and 12137594938 and is built by Bosch, a long-standing supplier of ignition and fuel-system components.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this coil improve starting and running reliability?\u003c\/h3\u003e\n\u003cp\u003eThe Bosch pencil coil supplies a steady, high-voltage pulse that helps spark plugs ignite the air\/fuel mixture consistently. Better ignition energy reduces the chance of misfires during cold starts and under load, which supports smoother idle and throttle response. The integrated high‑voltage boot and silicone overmold also guard against moisture and leakage that can interrupt spark delivery.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConsistent high-voltage output engineered to meet OE tolerances\u003c\/li\u003e\n  \u003cli\u003eMolded high‑voltage boot reduces boot separation issues\u003c\/li\u003e\n  \u003cli\u003eSilicone overmold improves insulation and corrosion resistance\u003c\/li\u003e\n  \u003cli\u003ePressure‑fit boot seals out contaminants for longer life\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat does \"pressure fit\" mean and why does it matter?\u003c\/h3\u003e\n\u003cp\u003e\"Pressure fit\" refers to the coil boot’s tighter seating on the spark plug, which requires a firm push to fully engage. This design forms a more secure seal, keeping dirt, oil and moisture away from the plug‑to‑coil connection. The result is fewer performance interruptions from contaminated contacts and more predictable ignition behavior over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFirmer seating prevents boot movement and disconnection\u003c\/li\u003e\n  \u003cli\u003eImproved environmental seal reduces corrosion risk\u003c\/li\u003e\n  \u003cli\u003eMaintains stable electrical contact under vibration\u003c\/li\u003e\n  \u003cli\u003eRequires a deliberate push to ensure proper installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich vehicles and parts does this coil fit and replace?\u003c\/h3\u003e\n\u003cp\u003eThis Bosch coil is a pencil‑style unit specified for a range of BMW and Rolls‑Royce applications where the OE numbers match. Always cross‑reference part numbers or consult vehicle fitment guides to confirm compatibility before purchase. The coil replaces OE references 00124, 12131712219, and 12137594938.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for select BMW and Rolls‑Royce engines using pencil coils\u003c\/li\u003e\n  \u003cli\u003eReplaces OE numbers: 00124, 12131712219, 12137594938\u003c\/li\u003e\n  \u003cli\u003eSold individually for single‑cylinder replacement needs\u003c\/li\u003e\n  \u003cli\u003eCheck VIN or parts catalog for exact vehicle fitment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does Bosch construction differ from aftermarket alternatives?\u003c\/h3\u003e\n\u003cp\u003eBosch uses integrated molding and materials chosen to mirror or exceed original equipment durability. The one‑piece high‑voltage boot molded to the coil avoids the two‑piece separations common in some aftermarket units. In addition, the silicone overmold and controlled manufacturing tolerances aim to reduce failure modes tied to moisture, heat and vibration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOne‑piece molded boot minimizes separation during removal\u003c\/li\u003e\n  \u003cli\u003eSilicone overmold offers improved insulation and longevity\u003c\/li\u003e\n  \u003cli\u003eManufactured to meet or exceed OE specifications for consistency\u003c\/li\u003e\n  \u003cli\u003eSingle‑unit sales let you replace only the failed coil when needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This Bosch 0221504464 ignition coil is for technicians, DIY enthusiasts, and vehicle owners who need an OE‑quality pencil coil replacement for compatible BMW or Rolls‑Royce models. It suits anyone wanting a direct‑fit, long‑lasting coil built with improved sealing and insulation to reduce misfires and the risk of premature failure. Confirm vehicle compatibility against the listed OE numbers before ordering to ensure correct fitment.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this Bosch coil a direct OEM replacement?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It replaces OE numbers 00124, 12131712219, and 12137594938 for compatible BMW and Rolls‑Royce models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need any special tools to install the pressure‑fit boot?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No special tools are required, but a firm, even push is needed to seat the pressure‑fit boot fully on the spark plug.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Bosch","offers":[{"title":"Default Title","offer_id":55167509758295,"sku":"B001COAL20","price":44.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/bosch-pencil-coil-front-view.jpg?v=1790387899","url":"https:\/\/britishgarage.co.uk\/products\/bosch-ignition-coil-pencil-coil-0221504464-single-oe-grade-silicone-overmolded-boot","provider":"British Garage","version":"1.0","type":"link"}