This ignition coil cap (spark plug boot) is produced by the world-renowned German ignition systems giant BREMI (13249A1.8) for the famous 6-cylinder silky-smooth E36 Chassis (320i, 323i, 328i) with M52 Engine of the BMW 3 Series. This critical rubber insulator transmits the high voltage generated by the ignition coil to the spark plug with zero loss. Over time, due to the immense heat from the engine, it hardens, cracks, and loses its functionality. A cracked boot allows electricity to escape to the engine block instead of reaching the spark plug (causing a short circuit). This situation leads to idle fluctuations, hesitation/stumbling when accelerating, a raw fuel smell, and increased fuel consumption in your M52 engine. Perfect your engine's ignition with BREMI quality.
- Saves You from Complete Coil Replacement Costs: Typically, the upper plastic part of the ignition coil remains intact, but the rubber boot underneath deteriorates. By simply replacing this BREMI cap, you can avoid the enormous costs of a complete coil and solve the hesitation issue.
- Silicone/Rubber Insulation Technology: BREMI's specially formulated high-temperature resistant insulation material prevents electrical leaks (arcing) at a rate of 100%. It ensures your engine runs at full power and smoothly.
- OEM Manufacturer Assurance: BREMI is one of BMW's factory ignition system suppliers. It provides a precise fit, seats perfectly on the spark plug, and prevents water/moisture ingress, protecting the spark plug socket.
- Definitive Solution for Hesitation and Vibration: It completely eliminates electrical leaks, which are the main culprits behind the momentary jolts and power losses you feel when stopping at lights or flooring the gas.
Technical Details
| Brand |
BREMI (Germany - Original Equipment Manufacturer) |
| Product Code |
13249A1.8 |
| Package Contents |
Price for 1 Piece (6 Pieces Should Be Added to Cart for 6 Cylinder) |
| Installation Location |
Connection Between Ignition Coil and Spark Plug |
| Compatible Engines |
BMW E36 Chassis (M52 Coded 6 Cylinder Engines: 320i, 323i, 328i) |
Frequently Asked Questions (FAQ)
My mechanic said the coils are faulty, will just replacing these boots solve the problem? In M52 engines, the electronic (upper) part of the ignition coil rarely fails. The main cause of hesitation is that these rubber boots at the end of the coil crack due to heat and allow electricity to escape to the engine block. Instead of buying a complete coil, renewing just these boots often resolves the issue 100% and saves you thousands of lira.
When I removed the old boot, it was full of engine oil, what is the reason? This is a classic chronic issue with M52 engines. When the valve cover gasket wears out, it leaks engine oil into the spark plug wells. The boot filled with oil swells, deteriorates, and interrupts the ignition. Before renewing the boots, your mechanic must definitely replace the Valve Cover Gasket (and the spark plug well seals) and clean those wells thoroughly with brake cleaner. Otherwise, your new boots will also deteriorate from oil within a few weeks, causing hesitation.
My car hesitates sometimes, will it work if I just buy the boot for the faulty cylinder? We definitely do not recommend this. If that boot has cracked after being exposed to heat for 100,000 kilometers, the other 5 boots have also endured the same heat and are on the verge of failure. If you want to regain the precise idle balance and flawless acceleration of your E36, you should order 6 pieces and replace them all as a set.
