Dinan Iridium Spark Plug - Heat Range 9 HV - BMW 2007-2021 - Single

Can I use this plug on a stock N54 or N55?

• It is recommended only for tuned, high boost or upgraded turbo N54 and N55 engines. On a stock N54 or N55 the plug may not reach its self-cleaning temperature, which can cause fouling, misfires and shorter plug life.

How much colder is it than the factory plug?

• One step colder on the N20, S55, N63 and S63, two steps colder on the N55 and three steps colder on the N54.

What gap and torque does it use?

• It comes gapped at 0.5mm and installs at 17 Nm.

How many plugs are in the box?

• One plug. Order one for each cylinder of your engine.

Does it work with ethanol blends?

• Yes. The electrode design is optimized for hard to ignite fuels such as ethanol.

Shipping

• In stock orders typically ship within 1 to 3 business days.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Special order items follow a lead time we confirm with you individually before the order is committed.
• Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
• Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
• Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
• Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
• Product images may be representative. The SKU and specifications in the listing are what ships.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Returns & Refunds · Warranty