Designed with the do-it-yourself enthusiast in mind, this comprehensive kit includes everything you need to overhaul your ignition system! By providing it all for you in a single click, we've made it easier than ever to get the quality replacement matching components you need when servicing your ignition system.
If you're experiencing misfires, poor fuel economy, reduced engine power, or ignition-related DTCs, a failing ignition coil is the likely culprit. Late-model BMWs utilize a coil-on-plug ignition system, with each cylinder receiving its own coil and spark plug to ensure efficient ignition. When an ignition coil fails, its corresponding cylinder receives no spark and begins to misfire. A misfiring engine may stumble at idle, hesitate upon acceleration, or emit an unpleasant fuel smell due to unburnt gasoline exiting the combustion chamber.
The S85's MSS65 DME uses a unique ignition system known as "Ionic Current Control". During engine development, BMW realized that standard knock sensors were insufficient for observing pre-ignition and misfires on a high-revving ten-cylinder engine. In lieu of standard knock sensors, Ionic Current Control uses each spark plug as a current probe, applying a low voltage to the electrode immediately after the power stroke and sending the resulting current to the Ionic Current Control Unit (ISS) for evaluation. To accomplish this, the S85 used a modified "pencil" style ignition coil, which eliminated the Zener diode in the secondary winding for accurate current measurement. These ignition coils are manufactured to the exact specifications of the OE Ionic Current Control-compatible ignition coil, and will not trigger ignition-related fault codes in the DME.
Bavarian Autosport ignition coils are designed to provide a reliable, long-lasting spark and are an exact fit for your S85-equipped E60 M5, E63 M6, or E64 M6. These high-quality OE replacements are constructed from durable, temperature-resistant plastic and feature high-quality rubber spark plug boots. Each boot is pre-lubricated with high-grade dielectric grease, ensuring easy installation and eliminating potential corrosion.
FEATURES
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Products are warrantied by their manufacturer. Eurosport Performance is an authorized reseller: every part we sell is covered by the manufacturer's own warranty, with its own terms and duration. Claims go through us, so you deal with Eurosport Performance rather than a form on the brand's site, but whether a claim is accepted is the manufacturer's decision.
Manufacturer terms apply Duration and coverage are set by the brand and differ from one to the next: some cover one year, some a lifetime, some only the original purchaser. The brand's warranty page is the reference; ask us if you cannot find it. | We file the claim for you Contact us with your order number, photos and a description of the issue. We open the claim with the manufacturer, follow it up, and arrange the repair, replacement or credit they approve. The manufacturer decides whether the claim is accepted. |
Fitment guarantee: North America only We guarantee fitment for vehicles sold in the North American market. Vehicles from other markets are out of scope; specifications differ, and it is the customer's responsibility to confirm compatibility before ordering. | No warranty on tuning files ECU and TCU tunes and other software files are sold without warranty and are not returnable once delivered or flashed. Tuning can affect your vehicle's factory warranty; please read the brand's terms before purchasing. |
Proof of purchase Your Eurosport Performance order is the proof of purchase every manufacturer asks for. Keep the order confirmation; it is also in your account on the site and in the SPECD app. | What is usually not covered Damage from improper installation, modification, abuse, racing or an incorrect application for the vehicle, and normal wear items such as pads, clutch discs and filters. Shipping and labour are covered only when the manufacturer's terms say so. |
It is the manufacturer's warranty for that product. Where the brand publishes it, we note it in the description; otherwise contact us before ordering and we will confirm the exact terms with them.
Stop using it if it is a safety-related part, then contact us with your order number, clear photos, and when and how the issue appeared. Do not return anything until we confirm the claim; manufacturers often require an inspection or an authorization number first.
The manufacturer. We prepare and submit the claim, provide the proof of purchase and push for a fair outcome, but acceptance, replacement or credit is their call under their terms. We pass their decision on to you as soon as we have it.
It depends on the manufacturer. Simple cases are approved in days; claims that need the part inspected can take a few weeks. We keep you updated at each step and push when it drags.
No. Tuning files are software; once delivered or flashed they cannot be returned, and they carry no warranty from Eurosport Performance or, in most cases, from the tuner. Support for the tune itself (revisions, flashing questions) comes from the tuning brand under its own terms.
No. Our fitment guarantee covers vehicles sold in the North American market only. European, Japanese and other market vehicles can differ in engines, electronics and dimensions, and a part listed for the North American model is not guaranteed to fit. If you order for one of these vehicles, confirming compatibility is your responsibility, and fitment issues on such vehicles are not covered by returns or warranty.
Labour is not covered unless the manufacturer's terms specifically include it. Having the part installed by a qualified shop protects your claim: improper installation is the most common reason a manufacturer declines.
No. Returns cover unused parts you no longer want, under our refund policy. Warranty covers a part that fails in use, under the manufacturer's terms. If you are unsure which applies, contact us and we will point you to the right one; please do not open a bank dispute, as it pauses both processes.
Questions about coverage before you buy? Email us with the product and your vehicle and we will confirm the manufacturer's terms.
