the shopkeepers are stocking parts bought from clearance houses - I know how these guys work, try asking them for a warehouse reciept of their part - it wont exist. - by correct trading their parts should have the Karachi warehouse coding on it
If suzuki sethi motors are buying parts from them then its their agreement, just like they can buy 20 litre containers of water to put on top of their water coolers.
By your rationale - mumtaz motors can import you a whole car in pieces - and sideline Pakistan suzuki motors - it doesnt work that way. Your example of not being able to find this part is classic of parchoon traders of parts - they only carry "fast moving" hard parts and nothing else. You can buy a replacement master cylinder from the PBR shop in Karachi any day of the year for this car, there are dozens of other shops selling Nissin brake replacement parts which are bought by showroom too to sell as "replacement" parts. They are not classified the same as genuine part. e.g. buying an Aisin water pump and a genuine toyota water pump are not the same part even if the aisin part has the word toyota ground off - The reason is that they are either surplus production or didnt pass toyota quality test.
Your thinking would be true if Pakistan Suzuki Motors in Karachi were buying spare parts from mumtaz motors or some other parchoon shop (which they are not) - Suzuki sethi motors is a private business, they probably dont care or give a damn about reputation or quality if they are openly sourcing parts from the market.
In your case - that hose pipe is a moulded part and is only sold by Suzuki because its unique to the car, Its only sold by the assembler as a service part who are "Pakistan Suzuki motors"
