QT Ignition Coil BMW B38, B48, B58, S58

The delivery time for products in stock is 1-3 business days.

If the product is not in stock and it is a pre order product, the average delivery time is 5-21 business days. If the product has a longer delivery time than previously announced, we will be in touch.

Terms for product returns:

• You must return the ordered products within 14 days of receiving
• The products must be unused and without damages
• Commission fee for handling returns is 21,90€
• For product returns, the customer is in charge of the return costs. Only door to door service (Express)
• Shipping costs are not refunded

For international orders (outside of Europe) sales are final and non-refundable. Once an order is placed, it cannot be canceled or returned. By placing an order, you acknowledge and agree to these terms.

Return address: QT Parts, Vasarakatu 8B, 37150 Nokia, Finland.

Pre order / made-to-order products

If the product you have ordered is a pre order or made-to-order item, it is not subject to the 14-day right of withdrawal or return under consumer protection laws, as the product is manufactured or sourced specifically based on the customer’s individual order.

If you wish to cancel your order before receiving the product, we will refund 50% of the total order amount.

This condition applies to the following product categories:

• Suspension
• Engine Tuning
• Engine Parts
• Exhaust Systems
• Fueling
• Turbochargers/superchargers
• Drivetrain
• ECE-approved Downpipes

All of the above products are manufactured or sourced individually based on the customer’s order, and therefore cannot be returned after delivery, unless the product has a manufacturing or material defect.

In the event of such a defect, the standard liability for defects as provided by consumer protection legislation shall apply.

Performance ignition coils For BMW B38, B48, B58, S58 engines.

Ensure adequate ignition with QT ignition coils.

The QT Ignition Coil is a more affordable, longer lasting and more tune-friendly alternative to the OEM ignition coil. No more broken coils and misfire codes.

More efficient ignition energy (+10% vs. OEM)

Higher energy transfer ensures optimal spark throughout the dwell time, improving ignition efficiency, especially in tuned and high-revving engines.

For hard driving - Better spark formation with high boost pressure

Ensures ignition performance even at high boost pressures and rich mixtures, which promotes cleaner combustion and better efficiency.

Save money - Longer service life and mechanical durability

Advanced insulation materials and a winding structure that reduces thermal stress prevent overheating and internal short circuits, extending the component's lifespan.

Forget about misfires - More stable performance under heavy loads

Designed to withstand continuous stress — the right choice for high-performance and tuned engines that require reliable ignition voltage across the entire load range. (where the OEM ignition coil fails)

Heat resistance up to 140 °C

Operating temperature in continuous use up to 120 °C – performance remains stable even at high temperatures without loss of power. (see comparison with original)

Optimized primary and secondary windings

The increased number of turns and high-quality copper wire improve current conductivity and ensure high, consistent ignition voltage even under heavy use.

• At less than 1.5 milliseconds, the performance of both sides is still at the same level.

• When the duration increases to 2.0 milliseconds, the energy delivery of the original coils begins to decline significantly, but the QT coils maintain stable power.

• At 3.0 milliseconds, QT coils produce up to approximately 25% more energy – a significant advantage in tuned or high-revving engines.

• Even at high temperatures of 140°C, QT coils maintain a stable energy level of 70 mJ, while original coils suffer a significant power reduction or stop working altogether.

Price per piece! Choose the correct amount depending on the machine type.

Replaces the following OE part numbers:

12138643360 / 12137619385 / 12138615991 / 12138678438 / 750990012