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Description
Used 21066-3718 REGULATOR-VOLTAGE [K9211-20]Used 21066 3718 REGULATOR VOLTAGE [K9211 20] INCLUDED ITEM [NUMBER NAME] 21066 3718 REGULATOR VOLTAGE NOTE Used item, with some damages and stains but still usable.
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4.6 ★★★★★
Based on 116 reviews
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Product Reviews
★★★★★ 3
Check engine light
Style: Gloss Black Single Slat, Size: G20（2019-2022）, Style: Gloss Black Single Slat, Size: G20（2019-2022）
Looks good but will throw a check engine light on your car. The fitment isn’t perfect causing the adaptive vents to show that they are failing even though they are not
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
★★★★★ 5
Quick fix
Style: Gloss Black Single Slat, Size: E46（2002-2005）4-Door
Easily Installed with no modification in under a minute. The finish was a little glossier, then OE.
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Reviewed in the United States on January 28, 2026
★★★★★ 5
Exact Fit for 2001 BMW 325CI Convertible
Style: Gloss Black Single Slat, Size: E46（1999-2002）2-Door, Style: Gloss Black Single Slat, Size: E46（1999-2002）2-Door
Perfect fit for a 2001 BMW 325CI convertible.
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Reviewed in the United States on March 8, 2026
★★★★★ 5
Fits nicely and matte looks much better than gloss IMO
I previously purchased a gloss kit that had a very poor fit so I had to return it. I got this which has an excellent fit and I actually like the matte finish much better (everything else which is black on the car is also matte: weather seals, door frame etc)
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Reviewed in the United States on October 9, 2024
★★★★★ 5
Great inexpensive mod
Very easy to install, the old grill was a little difficult getting out but the new grill fit perfect and easy to install on my son's 2008 E90/328i. Looks great, best $'s for the most bang we've spent so far...
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Reviewed in the United States on February 27, 2021
