Z3 Side Grills/Gils

Pros: Easy to Swap, Model Confusion
Cons: Price, Model Confusion
Cost: 51-13-2-492-949 M grille left $169.00 retail (unpainted)
51-13-2-492-950 M grille right $169.00 retail (unpainted)
51-13-8-399-719 Z3 Grille left $46.75 retail (unpainted)
51-13-8-399-720 Z3 Grille right $46.75 retail (unpainted)
painting the pair should cost $75-$100

The M roadster’s side grill design is pretty neat (pictured on top), but I prefer the less flashy shark gill style of the Z3 design (pictured on bottom). Its funny how this picture makes the M roadster one look smaller than the Z3 one, but the Z3 gills are actually ~1/16 inch shorter in length than the M ones? This slight difference will leave a larger gap between the gill and the body panel but not enough to really be noticeable.

Both designs are attached to the vehicle similarly. Five plastic snap connectors and one mounting point secured by a screw. To remove, I started by removing the single screw. Then using needle nose pliers, I squeezed the plastic connector wings together and pushed the plastic snaps back through the hole. Took about five minutes before I got them all loose. If you end up breaking one of these plastic snaps the replacement part is 51-13-8-399-231 and those clips list for $3 each. If you wanted to by the BMW nut it is part number 07-12-9-925-730 which lists for $0.08 each.

Once I was able to put the two designs side by side I noticed a small difference between the M roadster design and the Z3 design. The single mounting point required two different sized screws. After a quick trip to the hardware store I was back in business. The Z3 design required #10-23 1/2 inch machine screws, the M roadster design was a different size.

Putting the shark gill Z3 design vents on the M roadster was very easy. With some gentle pushing, the five plastic tabs snapped into place. I then secured the final point with the newly acquired #10-32 1/2 inch machine screw.

Very happy with the end result, now I truly have an MZ3. I’m keeping the M roadster design (so don’t email me asking for them). Do to mood swings I see myself switching between the two different designs a couple times a year. But for now, I think of it as being an M roadster in stealth mode.

When Z3 owners were asked: Which Z3 side vent design do you prefer [106 votes total]

Z3 Shark Gills Design 61(57%)

MZ3 Classic Design 45(42%)

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