The phrase "a low level part" is correct and usable in written English.
It can be used to describe a component or aspect that is not advanced or is basic in nature, often in technical or hierarchical contexts.
Example: "In the project, we need to focus on a low level part of the system to ensure that the foundational elements are functioning properly."
Alternatives: "a basic component" or "a fundamental aspect".
One of my first consulting projects as a student involved fixing an IBM 370 Assembler program that used registers, that is, a low-level part of the hardware architecture, as a convenient form of storage for a variable.
A low-level part of the visual system just one step removed from the retina buzzes while a monkey maintains a visual memory--a power once ascribed only to more sophisticated parts of the brain.
The overall design question is formulated in terms of a hierarchical control set-up with a low level motor control part and a high level sheet control part.
As Texas' rivers run dry and lakes fall to record low levels, part of the fight over water supplies is moving underground.
Brazil and Turkey helped broker an agreement under which Iran agreed to send uranium enriched at a low level abroad, reviving parts of a fuel swap plan proposed in October.
A panel led by Prime Minister Junichiro Koizumi has produced a draft report saying that growth will remain at a low level through 2002, in part because of deepening deflationary pressures caused by efforts to clean up the huge volume of nonperforming loans plaguing the banking system.
Hence, in the absence of a standard reliable protocol, the decisions regarding fitness to drive, are doubtful and exude a low level of confidence on part of the clinicians/professionals.
Overall, our findings are consistent with passive investors improving firm performance by advocating for proven governance reforms that require a low level of costly monitoring on their part.
The results of all the used methods (maximum water content, basic density, shrinkage, XRD analysis and holocellulose content) indicated a low level of degradation in the inner part of the wooden find.
Alignment of all sequences revealed a low level of polymorphism among isolates in this part of the genome (Figure 1).
