Bosch ignition coil pencil-style single for BMW & Rolls‑Royce — 0221504464 OE-fit, pressure-fit boot, silicone overmold

BOSCH 0221504464 is a single pencil-style ignition coil engineered as an OE-quality replacement to restore reliable spark delivery and consistent engine starts.

This Bosch ignition coil is designed for select BMW and Rolls‑Royce models and brings the brand’s decades of ignition-system expertise to the replacement market. Built to meet or exceed original equipment specs, this coil combines a one-piece high-voltage boot, silicone overmold insulation and a pressure-fit design so the coil seals firmly to the spark plug. The result is better spark energy where it matters and a durable assembly that resists moisture and corrosion over time.

How does this ignition coil affect starting and engine performance?

Replacing a worn coil with this Bosch unit helps restore consistent voltage delivery to the spark plug, which supports dependable starting and smoother running. It doesn’t alter engine tuning but ensures the ignition system can perform as the vehicle manufacturer intended.

• Delivers stable high-voltage output for reliable spark formation
• Pressure-fit boot reduces misfires caused by poor contact
• Silicone overmold limits corrosion that can weaken electrical connections

Why choose Bosch over aftermarket coils?

Bosch has a long history producing ignition components for OEMs, and this coil is manufactured to match or exceed those factory standards. That means materials, fitment and electrical performance are engineered to integrate with your vehicle’s existing ignition system.

• OE-level design and materials for predictable compatibility
• One-piece molded boot reduces failure points compared to two-piece designs
• Replaces specific OE part numbers for straightforward cross-referencing

What is the pressure-fit boot, and why does it matter?

The pressure-fit boot is an upgraded seal that requires a solid push to fully seat the coil on the spark plug. This snug interface keeps contaminants out and maintains consistent electrical contact under engine vibration.

• Tight seal minimizes moisture and debris intrusion
• Prevents intermittent connections that can cause misfires
• Designed for a secure mechanical and electrical union with the spark plug

Which vehicles and part numbers does this coil replace?

This pencil-style coil fits certain BMW and Rolls‑Royce engines that use the referenced OE numbers. Always confirm fitment using your vehicle’s VIN or compare OE part numbers prior to purchase.

• Replaces OE references like 00124, 12131712219 and 12137594938
• Commonly used in select BMW and Rolls‑Royce models—verify exact application
• Sold individually to allow targeted replacement of a single failed coil

Who is this product for? This Bosch ignition coil is aimed at vehicle owners, independent mechanics and repair shops looking for a durable, OEM-compatible replacement part for specific BMW or Rolls‑Royce applications. It’s especially useful when you need a reliable, long-lived coil that resists corrosion and maintains strong electrical contact under normal driving conditions. If your car shows misfires, rough idle, or difficult starting and diagnostics point to a coil issue, this Bosch coil is a direct way to restore proper ignition performance without aftermarket guesswork.