Genuine OEM 64508363041 - A/C Refrigerant Line O-Ring (Front)

Product Overview

This Genuine OEM A/C refrigerant line O-ring (part number 64508363041) is a factory-specification seal designed for BMW air conditioning systems. The O-ring maintains a hermetic seal on refrigerant lines, preventing refrigerant leakage and system failure. This front-position component is critical to A/C performance and is commonly replaced during refrigerant line service, compressor replacement, or condenser work. Genuine OEM parts ensure exact fitment and durability across a wide range of BMW models from 2009 to 2020.

This O-ring is sold individually. Order quantity 2 if replacing both front and rear refrigerant line connections, or as directed by your service manual.

Symptoms of a Failing A/C Refrigerant Line O-Ring

• Weak or no cold air from the A/C vents despite compressor operation
• Refrigerant hissing or escaping from refrigerant line connections
• Visible oil residue or moisture around refrigerant line fittings
• A/C system pressure loss detected during diagnostic testing
• Air conditioning compressor cycling on and off rapidly

Cross Reference Numbers

This Genuine OEM 64508363041 is equivalent to or replaces the following part numbers: 64508363041, 6450836304.

Vehicle Compatibility

This part fits the popular models below. For Fitment Confidence, please use the vehicle selector tool above to verify exact compatibility for your vehicle.

• BMW 228i 2.0 L4 Gas (F22): 2015
• BMW 228i xDrive 2.0 L4 Gas (F22): 2015
• BMW 320i 2.0 L4 Gas (F30): 2013, 2017
• BMW 320i xDrive 2.0 L4 Gas (F30): 2017
• BMW 328d 2.0 L4 Diesel (F30): 2017
• BMW 328d xDrive 2.0 L4 Diesel (F30): 2014
• BMW 328i xDrive 2.0 L4 Gas (F30): 2016
• BMW 335i xDrive 3.0 L6 Gas (F30): 2014
• BMW 428i Gran Coupe 2.0 L4 Gas (F36): 2016
• BMW 428i xDrive 2.0 L4 Gas (F32): 2015
• BMW 435i 3.0 L6 Gas (F32): 2014, 2016
• BMW 435i xDrive 3.0 L6 Gas (F32): 2016
• BMW 535d 3.0 L6 Diesel (F10): 2014, 2015
• BMW 535d xDrive 3.0 L6 Diesel (F10): 2014
• BMW 535i GT xDrive 3.0 L6 Gas (F07): 2013
• BMW 535i GT 3.0 L6 Gas (F10): 2016
• BMW 550i 4.4 V8 Gas (F10): 2014, 2015, 2016
• BMW 550i GT xDrive 4.4 V8 Gas (F07): 2014, 2015, 2016
• BMW 640i 3.0 L6 Gas (F06, F12, F13): 2017, 2018
• BMW 640i Gran Coupe 3.0 L6 Gas (F06): 2018
• BMW 640i xDrive 3.0 L6 Gas (F06): 2018
• BMW 640i xDrive Gran Coupe 3.0 L6 Gas (F06): 2014, 2015
• BMW 650i 4.4 V8 Gas (F12, F13): 2018
• BMW 650i Gran Coupe 4.4 V8 Gas (F06): 2018, 2019
• BMW 650i xDrive 4.4 V8 Gas (F12, F13): 2016
• BMW 650i xDrive Gran Coupe 4.4 V8 Gas (F06): 2013, 2015, 2017, 2019
• BMW 740i 3.0 L6 Gas (G11): 2013
• BMW 740Li 3.0 L6 Gas (G11): 2013, 2014
• BMW 740Li xDrive 3.0 L6 Gas (G11): 2015
• BMW 750i 4.4 V8 Gas (F01, G11): 2013, 2015
• BMW 750i ActiveHybrid 4.4 V8 FHEV (F01): 2011
• BMW 750i xDrive 4.4 V8 Gas (F01, G11): 2013, 2014, 2015
• BMW 750Li 4.4 V8 Gas (F01): 2012, 2015
• BMW 750Li ActiveHybrid 4.4 V8 FHEV (F01): 2012
• BMW 750Li xDrive 4.4 V8 Gas (F01): 2015
• BMW 750Li xDrive 4.4 V8 Gas (G11): 2010
• BMW 760Li 6.0 V12 Gas (F01, G11): 2011, 2013, 2014
• BMW Alpina B6 xDrive Gran Coupe 4.4 V8 Gas (F06): 2015, 2017
• BMW M2 Competition 3.0 L6 Gas (F87): 2019, 2020
• BMW M235i 3.0 L6 Gas (F22): 2015, 2016
• BMW M4 3.0 L6 Gas (F82): 2015
• BMW M4 CS 3.0 L6 Gas (F82): 2019
• BMW M5 4.4 V8 Gas (F10): 2014
• BMW M6 4.4 V8 Gas (F06, F12, F13): 2014
• BMW M6 Gran Coupe 4.4 V8 Gas (F06): 2015
• BMW M3 3.0 L6 Gas (F80): 2017
• BMW X1 xDrive35i 3.0 L6 Gas (E84): 2014, 2015
• BMW X5 M 4.4 V8 Gas (F85): 2015, 2016
• BMW X5 sDrive35i 3.0 L6 Gas (F15): 2016, 2017
• BMW X5 xDrive35d 3.0 L6 Diesel (F15): 2015, 2017
• BMW X5 xDrive35i 3.0 L6 Gas (F15): 2014, 2018
• BMW X5 xDrive50i 4.4 V8 Gas (F15): 2014, 2015
• BMW X6 M 4.4 V8 Gas (E71, F16, F86): 2010, 2012, 2014, 2016, 2018
• BMW X6 sDrive35i 3.0 L6 Gas (F16): 2018
• BMW X6 xDrive35i 3.0 L6 Gas (E71, F16): 2009, 2010, 2012, 2016
• BMW X6 xDrive50i 4.4 V8 Gas (E71, F16): 2009, 2010, 2014
• BMW Z4 sDrive28i 2.0 L4 Gas (E89): 2014

This may also fit other applications. Please use the vehicle selector tool to verify fitment.

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Frequently Asked Questions

How do I know if my BMW A/C refrigerant line O-ring needs replacement?

The most common sign is a sudden loss of cold air from the A/C vents despite the compressor running normally. You may also notice refrigerant hissing at the connection point, visible oil residue around the fitting, or moisture accumulation. A professional A/C diagnostic test will confirm refrigerant pressure loss and pinpoint the leaking connection.

Is this O-ring part of a larger refrigerant line assembly, or is it a standalone seal?

This O-ring is a standalone seal that sits in the groove of a refrigerant line fitting. It is not part of a complete line assembly. When replacing refrigerant lines or servicing connections, the O-ring is often replaced as a preventive measure to ensure a fresh, leak-free seal. Always replace it if the line has been disconnected or if refrigerant loss is suspected.

Can I reuse the old O-ring, or must I always install a new one?

O-rings should always be replaced with new ones. Over time, they lose elasticity and can develop micro-tears or hardening, especially after exposure to refrigerant and temperature cycling. Reusing an old O-ring risks continued leakage and system failure. A new OEM O-ring costs very little compared to the cost of a full A/C system recharge or compressor replacement.

What refrigerant type should I use after replacing this O-ring on my BMW?

Consult your vehicle's service manual or the refrigerant label inside the engine bay for the correct refrigerant type. Most modern BMWs use R-134a, but some newer models may use R-1234yf. After replacing the O-ring, the system must be evacuated and recharged by a certified technician with proper A/C service equipment.

How many O-rings do I need if I am servicing multiple refrigerant line connections?

This depends on which connections you are servicing. BMW A/C systems typically have multiple connection points (compressor inlet, condenser, evaporator, receiver-drier). If you are replacing more than one connection, order additional O-rings. It is common practice to replace all O-rings during a major A/C service to prevent future leaks.

Is this O-ring compatible with both R-134a and R-1234yf refrigerants?

Genuine OEM O-rings are engineered to work with the refrigerant specified for your vehicle. While many O-rings are compatible with both R-134a and R-1234yf, always verify the compatibility in your service manual or with a BMW technician before installation. Using the wrong refrigerant type can damage seals and the entire A/C system.

Order Genuine OEM 64508363041 today to restore a reliable, leak-free A/C seal on your BMW. In-stock orders ship same or next business day from our U.S. warehouse, and our fitment team is one call away if you need help confirming the right part for your vehicle.

Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.