3 sourced reports, with what to check before you buy. Each one links to the page it was reported on.
Costly or dangerous
Beko 974509 MB fan motoru arızalı, değişim sonrası da soğutmuyor
Owner reports the 974509 MB never cooled from day one; authorized service replaced the fan motor but cooling still failed, and Beko refused a refund.
What to check. If a 974509 MB fails to cool, the fan motor is a known first suspect, but this owner shows replacement alone did not fix it — expect possible repeat visits and a hard time getting a refund even under warranty.
Beko 974509 MB kompresör üstü plastik aksam aşırı ses çıkarıyor
Owner reports excessive noise from the plastic assembly above the compressor after about 6 months of use.
What to check. Expect the 974509 MB to develop a noisy compressor-area rattle within the first year; it is a nuisance rather than a cooling failure, but it may require a service visit to silence.
Beko 974509 MB sebzelik bölmesi çok yavaş soğuyor (+12'den +4'e 18 saat)
A verified buyer notes the freezer reached -18 quickly but the vegetable compartment stayed at +12 and took about 18 hours to reach +4 on first startup.
What to check. On first power-up the fresh-food compartment of the 974509 MB can be very slow to reach temperature; allow up to ~18 hours before loading perishables, and don't treat the slow initial cooldown as a defect.
These reports come from the pages linked under each item: owner forums, repair guides and workshops. They are not a diagnosis of any one unit, and a careful check of the one you are buying still applies.
Text from the Kriko Refrigerators catalog, version 0.1.1, under the CC-BY-SA-4.0 license.