There is also a previous video on the maintenance cost and reliability of these two SUVs after 100,000km (62,000 mi). Overall summary is:
>> The NX had zero issues over the entire distance. Maintenance is completely free. No parts other than regular fluids and filters needed changing. Regen braking means no brake pad/rotor changes. Low ICE usage means no spark plug changes. D-4S system means zero carbon build up that is expensive to clean.
>> The X3 cost ¥22k to maintain including spark plugs change every 28,000km. The X3 had one check engine light resulting in power loss during normal driving (which is also a common problem with ChDM B48 equipped models) and BMW does not have a solution. The X3 also had a TPMS failure exactly at the 100,000km mark.
>> The NX350h averaged 5.37L/100km vs. 8.18L/100km of the X3 25Xi and saved roughly ¥30k. They actually downplayed the fuel cost advantage of the NX since it requires only 92RON(87AKI) fuel but they were using 95RON(91AKI) the entire time.
>> Lexus significantly underrated the acceleration performance of the NX350h. Its 0-100km/h time beat official time by 1.3s. The review praised the responsive power delivery.
>> The factory tires have terrible grip resulting in unacceptable braking distance (42m 100-0 km/h, for reference this is the braking distance of a lot of full-size pickup trucks). Tire change is recommended out of factory since safety is compromised with factory tires.
>> The NX350h is noticeably louder than the X3 under any condition (including coasting with ICE off). Teardowns show Lexus is skimping on noise insulation and vibration dampening materials compared to BBA and only comparable to a "second rate" premium brand.
>> The X3 had oil leaks from the front differential. The engine had significant wear on the lower portion of the main bearing since BMW cheaped out on bearing coatings (only the upper portion of main bearing is coated). There is also considerable amount of carbon buildup on the valves. The NX's engine is almost as good as new.
>> The NX had worse VOC emissions under intense sunlight simulations, but that's due to the dealer-installed window tint. Otherwise it had better VOC emissions than the X3.
>> The front crash structures are comparable between the two. Rear crash structures are better on the NX. But the NX has higher repair costs in both front and rear collision scenarios.
>> The NX had the worst panel gaps of the four compact luxury SUVs tested (GLC, Q5L, X3, NX). Over time the inconsistencies in panel gaps also became worse on the NX.