Coolant Hose Fitting Repair Kit – BMW N51 / N52 / N53 / N54 / N55 / N20 / N26 | OEM 11537544638 | Aluminium
The plastic coolant hose fitting (11537544638) on BMW N51, N52, N53, N54, N55, N20, and N26 engines is a well-known failure point — cracking with age and causing coolant leaks. This aluminium repair kit permanently replaces the plastic fitting with a durable aluminium unit, eliminating the risk of recurrence. BMW models with N51, N52, N52N, N53, N54, N55, N20, or N26 engine — verify fitting location before ordering
Fits OEM #11537566329.
When to Inspect This Part
- whistling or excessive crankcase vacuum
- smoke after warm-up
What's Included
- Repair components supplied for this SKU and shown in the product photos; no complete surrounding assembly is included
OEM Part Numbers and Vehicle Fitment
Additional confirmed fitment
- BMW 1 SERIES M 2011
- BMW 128I 2008-2013
- BMW 135I 2008-2013
- BMW 135IS 2013
- BMW 228I 2014-2016
- BMW 320I 2012-2018
- BMW 323I 2006-2011
- BMW 325I 2006
- BMW 325XI 2006
- BMW 328I 2007-2016
- BMW 328XI 2007-2008
- BMW 330I 2006
- BMW 330XI 2006
- BMW 335I 2007-2016
- BMW 335IS 2011-2013
- BMW 335XI 2007-2008
- BMW 428I 2014-2016
- BMW 435I 2014-2016
- BMW 528I 2011-2016
- BMW 535I 2008-2016
- BMW 535I GT 2010-2017
- BMW 535XI 2008
- BMW 640I 2012-2018
- BMW 740I 2011-2015
- BMW 740LI 2011-2015
- BMW ACTIVEHYBRID 3 2013-2015
- BMW ACTIVEHYBRID 5 2012-2016
- BMW ACTIVEHYBRID 7 2013-2015
- BMW M2 2016-2018
- BMW M235I 2014-2016
- BMW X1 2012-2015
- BMW X3 2007-2017
- BMW X4 2015-2018
- BMW X5 2007-2018
- BMW X6 2008-2018
- BMW Z4 2006-2016
Part Number / PN
11537566329, 11537560363, 11537592095, 11537552339, 11537550062, 11537578727, 11537545890, 11537591889, 11537605152, 11537649409, 11537598234, 11537585023, 11537541992, 11537580969, 11537581063, 11537544638, 11537584549, 11537603514, 11428637820, 11428637821, 7544789
Important Fitment Check
Before ordering, compare the part design, dimensions, connectors, and every available OEM/P/N marking with the part installed on the vehicle. Matching OEM/P/N 11537566329 is the primary fitment check.
FAQ
How do I confirm fitment for this Coolant Hose Fitting Repair Kit?
Compare the exact OEM/P/N and physical design with the installed part. The primary reference is 11537566329. Do not select the part by vehicle model alone.
What symptoms may indicate a problem with this Coolant Hose Fitting Repair Kit?
Confirmed symptoms include whistling or excessive crankcase vacuum, smoke after warm-up. Diagnose the original assembly before ordering so another fault is not mistaken for this part.
What is included with this Coolant Hose Fitting Repair Kit?
The confirmed kit contents are: Repair components supplied for this SKU and shown in the product photos; no complete surrounding assembly is included.
Does this listing include the complete surrounding assembly?
No. It includes only the item or repair components identified for this SKU. Inspect related parts separately and replace them only when diagnosis confirms a fault.
What should be checked before installation?
Check the OEM/P/N, dimensions, connectors, orientation, and condition of the mating components. Installation should follow the correct service procedure for the specific vehicle and assembly.
Read All
Orders ship within 1–2 business days.
Standard delivery:
- USA: Some items ship from our US warehouse and arrive within 3 business days.
- USA-EU: 10–21 business days
- Worldwide: 14–30 business days
Shipping cost is shown at checkout.
Can I exchange or return an item?
Yes, you can exchange or return an item within 14 days of purchase. This right is guaranteed to you by the Law on the Protection of Consumer Rights
To use this feature, please make sure that:
- the product was not in use and has no traces of use: scratches, chips, abrasions, etc.
- the goods are fully completed and the integrity of the packaging is not violated
- retained all labels and factory markings