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BMW E36 Radiator Cap 140 Degrees - BMW 17137639023 Bmw E46 R
Aracıma Uygun mu?
BMW E36 Radiator Cap 140 Degrees - BMW 17137639023 Bmw E46 R
BMW E36 Radiator Cap 140 Degrees - BMW 17137639023 Bmw E46 R

BMW E36 Radiator Cap 140 Degrees - BMW 17137639023 Bmw E46 R

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17 people viewed in the last 30 days
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BMW E46 Radiator (Expansion Tank) Cap - 140

Original BMW (17137639023) | 1.4 Bar Pressure Valve | Branded Product

This is an original BMW (17137639023) branded radiator spare part water reservoir cap designed for the cooling system of BMW 3 Series E46 Chassis (1998-2005) vehicles (especially those with M47/M57 diesel engine versions). This part is not just a plastic cap that holds water inside; it is a precise 1.4 Bar (140) pressure adjustment valve that maintains the temperature balance of your engine and prevents the system from bursting. Over time, caps that lose their function due to spring fatigue or hardening of the o-ring gasket can cause water to evaporate secretly or hoses to swell excessively. It offers 100% original BMW assurance for those who do not want to leave the cooling system to chance.

  • 100% Original Branded Part: Completely eliminates the risks of "opening at the wrong pressure" or "premature failure" commonly encountered with aftermarket caps. Restores the quality and reliability of your vehicle to that of the day it left the factory.
  • Vital 1.4 Bar (140) Valve: Safely releases excess air when the system pressure exceeds 1.4 bar (when it reaches a dangerous limit) and reseals the system when the pressure returns to normal, preventing the coolant from boiling.
  • Sealed Original Gasket: Thanks to the original rubber gasket that withstands the constantly changing temperatures (expansion/contraction) under the hood, it effectively prevents the water in the system from evaporating and escaping.
  • Hidden Water Loss and Overheating Solution: If your E46 is constantly losing water but you cannot find any physical dripping (leak) in the hoses or radiator, you can solve the problem by replacing your faulty and steam-leaking old cap with this original part.

Technical Details

Brand BMW (Original Branded Product)
Product Code 17 13 7 639 023
Opening Pressure (Valve Value) 1.4 Bar (Marked 140 on the cap)
Compatibility BMW E46 Chassis (Typically Diesel Engines and 1.4 Bar System Vehicles)

Frequently Asked Questions (FAQ)

My petrol E46 3.20i has a cap that says "200", what happens if I buy this original cap that says "140"? You should definitely not install it. The cooling system of petrol E46s (M52/M54) is generally calibrated for 2.0 Bar (200) pressure. If you install this 1.4 bar (140) cap on a 2.0 bar system, the cap will mistakenly open early thinking the pressure is dangerous when the system reaches normal operating temperature, causing your vehicle to continuously expel water (boil). Make sure that "140" is written on your old cap before ordering.
My radiator hoses become rock hard while running, is the problem due to the 140 cap? If your vehicle is factory equipped with a 140 system, the issue is not the 140 cap; it is the failure of the drain valve inside your current cap that has become stuck. A stuck cap cannot release excess pressure and will inflate the hoses to the point of bursting. When you replace it with this original BMW cap, the valve will open at the correct pressure, relieving the excessive tension in your hoses.
Why should I prefer an Original BMW cap over an aftermarket cap? BMW's cooling system is very sensitive. The spring mechanisms inside aftermarket caps are often poorly calibrated. They may open at 1.0 bar instead of 1.4 bar, causing coolant to leak, or they may not open at all, potentially bursting your spare water reservoir. An original part is the cheapest insurance that protects your E46 from thousands of dollars in overheating costs.
949 ₺
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