Renault have launched a protest against both Racing Point cars after the Styrian GP.
In a statement on Twitter, Renault said they "submitted a request to the stewards of the event for clarification on the legality of the Racing Point RP20".
Stewards judged the protest 'admissable' on Sunday evening and have impounded the front and rear brake ducts from Racing Point's two cars for the FIA "in preparation for conducting a detailed analysis of those pieces".
Racing Point have made a big step forward in performance this year and have openly admitted that the design of their RP20 car has been based on last year's title-winning Mercedes. The team are adamant that they adhered to all F1 regulations in its design and production.
Stewards also ordered Mercedes to provide the front and rear brake air ducts of last year's W10 for inspection.
A date for the case to be heard will be set once all the evidence has been gathered by the FIA technical representative.
Sergio Perez and Lance Stroll finished sixth and seventh respectively in Sunday's race, although the latter was challenging for fourth into the closing stages before breaking the RP20's front wing in a clash with Alex Albon.
The RP20 has been a source of controversy for a number of Racing Point's midfield rivals since winter testing.
Renault have alleged several rule breaches in their submission to the stewards, including citing the sporting regulation that states that "a competitor shall, in respect of the Listed Parts to be used in its cars in Formula One, only use Listed Parts which are designed by it".
A similar protest move from one of Racing Point's midfield rivals had been mooted before F1's originally-planned season-opening Australian GP back in March before the event was cancelled.