If you have come across the BMW part number 17127799184, you are probably trying to identify the part, check whether it fits your BMW, or find a replacement. The number is also written as 17 12 7 799 184 or 17-12-7-799-184.
BMW parts catalogs identify 17127799184 as a lock, while BMW parts retailers also describe it as a radiator hose connector lock, upper hose lock ring, or related coolant-hose locking component. Its exact position can vary by BMW model and engine, so checking the vehicle application is important before ordering.
What Is 17127799184?
17127799184 is a BMW OEM part number for a locking component used with certain cooling-system and oil-filter/heat-exchanger assemblies. BMW’s parts catalog lists it simply as a “Lock.” Other parts catalogs describe the same component as a radiator hose connector lock or upper hose lock ring.
The part number belongs to BMW’s 17-series parts group, which covers cooling-related components. Depending on the vehicle, 17127799184 can appear in diagrams for engine coolant hoses, the oil filter heat exchanger, or related assemblies. For example, RealOEM lists the part in both cooling-system coolant-hose and oil-filter/heat-exchanger diagrams on certain BMW 4 Series models.
This is a relatively small part, but that does not mean it should be ignored when damaged. A locking component in a hose connection needs to hold the related fitting securely. If it is broken, missing, or incorrectly installed, the connection may not remain secure.
What Does BMW Part 17127799184 Do?
The main job of 17127799184 is to lock or secure a related connection within the BMW cooling or heat-exchanger system. It works as part of an assembly rather than as a standalone mechanical component. Its exact position depends on the BMW chassis and engine.
This explains why online descriptions can look slightly different. One supplier may call it a “Lock,” another may call it an “Upper Hose Lock Ring,” while another may list it as a “Radiator Hose Connector (Lock).” These names refer to the same BMW part number, but the application shown by the catalog should always take priority over a generic description.
Because the part is associated with coolant-hose assemblies on some vehicles, damage around this area deserves attention. A loose or improperly secured hose connection can contribute to coolant loss. If you see coolant around a connection, do not automatically assume that 17127799184 itself is the source. The hose, connector, O-ring, housing, or another nearby component may also be responsible.
BMW Models That Use 17127799184
One of the most important things to understand about this part number is that 17127799184 is used across a range of BMW vehicles. It is not limited to one model or one engine.
BMW parts databases show applications involving models such as the 1 Series, 2 Series, 3 Series, 4 Series, 5 Series, X3, X4, X5 and other BMW vehicles, depending on the engine and production date. RealOEM, for example, shows the part on several F20/F21 1 Series, F22/F23 2 Series, F30 3 Series and F32/F36 4 Series applications.
Parts retailers also list the number for vehicles such as the E60 535i, E70 X5 xDrive35i, F30 330e and 330i, F32/F33/F36 4 Series models, and several other applications. The listings demonstrate why simply matching the BMW model name is not enough. Engine type, chassis, production date, and other vehicle details can change the correct part.
For that reason, do not order 17127799184 just because you own a BMW model that appears in an online listing. Always confirm the exact application for your vehicle.
Signs That 17127799184 May Need Replacement
A broken or missing lock can be difficult to diagnose by itself because it is normally part of a larger hose or heat-exchanger assembly. One of the first things to look for is visible damage around the related connection. A cracked locking piece, missing clip, or connection that does not stay firmly in place can indicate a problem.
Coolant residue or a small leak near a hose connection is another reason to inspect the area. However, coolant leakage does not prove that 17127799184 is defective. The leak may come from the hose, sealing ring, connector, radiator, thermostat housing, or another component nearby.
If a hose or fitting has recently been removed for repair, check that the locking mechanism has been installed correctly before driving the vehicle. A connection that looks secure but has not been locked properly can create problems later. If you are unsure about the condition of the cooling system, having the connection inspected by a BMW technician is a sensible choice.
How to Check If 17127799184 Fits Your BMW
The safest way to confirm fitment is to use your VIN (Vehicle Identification Number). BMW parts sellers commonly provide a vehicle-selection or VIN-based fitment check because the same part number can appear across different engines and chassis.
You can also compare your BMW’s model, chassis code, engine, production date, and the number printed on the existing component. RealOEM’s catalog is useful for checking where a BMW part number appears within specific vehicle diagrams. Its listings show 17127799184 under different assemblies depending on the selected BMW.
If the seller’s information conflicts with your BMW’s parts catalog, do not rely on the product title alone. A correct-looking number with the wrong application can result in ordering the wrong component. When buying online, enter your vehicle details into the seller’s fitment system and compare the OEM number before placing the order.
OEM vs Aftermarket 17127799184
A genuine BMW version of 17127799184 is sold under the BMW part number, while aftermarket manufacturers may offer replacement components listed against the same OEM reference. Online catalogs currently show several aftermarket brands cross-referencing 17 12 7 799 184.
The main point is not simply whether a part is cheaper. Check the manufacturer, material, fitment information, return policy, and seller reputation. For a small locking component, an inexpensive replacement may look attractive, but poor fit can create trouble if the part does not secure the related connection correctly.
If you prefer a genuine BMW component, look for a listing that clearly identifies the manufacturer as BMW and uses 17127799184 as the manufacturer part number. Genuine BMW listings currently describe the component as a direct replacement.
How to Replace 17127799184
The replacement procedure depends on the BMW model and the exact assembly where the part is installed. In some applications, the lock is part of a coolant-hose connection, while in others it appears in an oil-filter or heat-exchanger diagram.
Before working on a cooling system, allow the engine to cool completely. Never open a pressurized coolant system while the engine is hot. Once the relevant connection is accessible, the old locking component can be inspected and replaced according to the vehicle’s repair procedure.
The important part is making sure the hose or fitting is fully seated and the new lock is correctly positioned. If an O-ring or another sealing component is damaged, replacing only the locking piece may not solve the problem. After the repair, the area should be checked for leaks and the cooling system should be serviced according to BMW’s procedure for that particular vehicle.
How Much Does 17127799184 Cost?
The price of 17127799184 depends on the seller, country, supplier, and whether you choose a genuine BMW part or an aftermarket replacement. Current online listings show genuine BMW pricing around the $18–$20 range from some U.S. parts retailers, while other catalogs show different prices by market and supplier.
The part itself is relatively inexpensive compared with many BMW cooling-system components. Labor can be the larger expense if the lock is difficult to access or another component must be removed to reach it.
Before comparing prices, make sure you are comparing the same part number and condition. Shipping costs can also make a low-priced listing more expensive than a local supplier.
Where to Buy 17127799184
You can look for 17127799184 through BMW dealerships, established BMW parts retailers, independent European-car parts suppliers, and reputable online marketplaces. Genuine BMW listings commonly use both 17127799184 and 17-12-7-799-184, so searching both formats can help you find more listings.
When buying online, check the manufacturer part number rather than relying only on the product title. Some websites use descriptions such as “upper hose lock ring,” “hose clamp,” or “radiator hose connector.” These descriptions can vary between sellers even when they refer to the same BMW number.
Most importantly, confirm your VIN or vehicle details before ordering. A seller may list dozens of compatible BMW applications, but that does not mean every version of a particular model uses the same component.
Conclusion: Is 17127799184 the Right Part for Your BMW?
17127799184, also written as 17-12-7-799-184, is a BMW locking component used in certain cooling-system and oil-filter/heat-exchanger applications. It appears across a range of BMW models and engines, which makes exact fitment more important than simply matching the BMW model name.
If you are replacing this part, start with the VIN and compare the BMW OEM number with the vehicle’s parts catalog. Check the surrounding hose, connector, and sealing components as well, especially if you are dealing with a coolant leak. Choosing the correct part number is the simplest way to avoid an unnecessary return or an incorrect repair.
FAQs About 17127799184
What is 17127799184?
17127799184 is a BMW OEM part number. BMW catalogs identify it as a Lock, while some parts retailers describe it as a radiator hose connector lock or upper hose lock ring.
Is 17127799184 the same as 17-12-7-799-184?
Yes. 17127799184, 17 12 7 799 184, and 17-12-7-799-184 are different ways of writing the same BMW part number.
Which BMW models use 17127799184?
The part is used across various BMW models, including selected 1 Series, 2 Series, 3 Series, 4 Series, 5 Series, X3, X4 and X5 applications. Exact compatibility depends on the chassis, engine, production date, and other vehicle specifications.
Can I install 17127799184 myself?
That depends on the BMW model and where the lock is located. If it is part of a coolant connection, the engine must be completely cool before the system is opened. If access is difficult or you are unsure about the connection, professional installation is safer.
How can I confirm that 17127799184 fits my BMW?
Use your VIN with a BMW parts catalog or reputable BMW parts seller. You can also compare the chassis, engine, production date, and existing part number. VIN-based verification is preferable to relying on a general model listing.
Is 17127799184 a genuine BMW part?
Yes. 17127799184 is listed as a genuine BMW part number by BMW parts retailers and BMW parts catalogs. Aftermarket replacements are also available under the same OEM reference.
