Trusting the registration test as a condition report
The Tasjeel or ADNOC test is a roadworthiness screen that takes minutes on rollers and gauges. It says nothing about paint depth, gearbox health, AC capacity, timing components or flood history. Treat a fresh pass as the floor requirement and the independent inspection as the actual assessment of what you are buying.
Reading a cleared fault memory as a clean car
An empty fault list with incomplete readiness monitors means the memory was wiped recently, which is the opposite of reassuring. Insist on a re-scan after 50-100 km of driving, or make the deal conditional on it. The absence of history is a finding, not a pass.
Paying GCC-spec money for an unverified import
The premium for GCC cars exists because of cooling packages, dust filtration and warranty validity. If the door-jamb sticker, VIN history and cooling hardware say the car was built for Michigan or Osaka, the price should say so too. Verify the build market before negotiating, because the discount is your compensation for extra risk.