I used them as front and rear turn signals on my 1999 Ford F350. When I opened the box and they arrived my first thought was "Oh these things are HUGE". But there was enough space in the lenses in the truck and they fit perfectly, don't worry. Since I needed 4 and it was an 8 pack I figured I might as well use a couple of these for backup lights. Even if they're just single filaments (remember 1157 instead of 3157?), they fit and glow great and are way brighter than the old incandescent bulbs. This should make reversing with a trailer much more pleasant. The reverse light lens assembly was a bit firmer - the LED assembly almost touches the plastic inside but fits. Hardly. Note that they are polarity sensitive - whatever you are replacing, activate these lamps (turn on 4 directions or have someone reverse check the car) and give it a try. If it doesn't light up, flip it over and it should work. Also note that you may need to upgrade the flashing module to be compatible with LEDs. I did so and after ordering a piece of an unwanted module from Revain, I received a Novita brand EP27 module instead which worked great. I worked with the bad one at first, but then it kept clicking even with the engine off and the key removed. Not good. The Novita brand has worked as expected, so do yourself a favor and just get started. Your local auto parts store may even have them in stock.
Upgrade Your Headlights With H1 LED Bulbs: 8 Sides CSP Chips, Super Bright White 6000K And 12000LM For High/Low Beam And Fog Lights - Get 360 Degree Lighting
40 Review
LEDKINGDOMUS 44Mm Festoon LED Bulb, Bright White Interior Light For Car Dome Map, 12 SMD 3528 Chips, Rigid Loop, Compatible With 561 562 567 564, Pack Of 4
36 Review
12 Pack - WEIMELTOY Red LED Car Bulb 194 With 3030 Chipset & 2 SMD T10/168/W5W Wedge Light Bulbs, 1.5W 12V For License Plate, Courtesy, Step & Trunk Lamps, Clearance Lights
36 Review
10 Pack BRISHINE 194 LED Bulbs - Extremely Bright Ultra Blue 5630 Chipsets For Car Interior Dome Map Door Courtesy Trunk License Plate Lights
40 Review
1999-2002 Chevy Silverado/Tahoe Headlight Assembly - 2 Year Warranty!
27 Review
XPCTD Upgraded LED Fog Lights Passing Lamps For Dodge Ram 1500 2500/3500 2002 2003 2004 2005 2006 2007 2008 2009 Durango 2004-2006 Truck Chrome
37 Review
Black Bezel Halogen Type LED Halo Ring Eye Lid Projector Headlights For 2006-2008 BMW E90 3 Series 4 Door Sedan
32 Review
Enhanced 3Rd Brake Light For Ford F250 F350 Super Duty Trucks: LED Tail Cab Cargo Lights & Stop Light Compatible With F450 F550 And 1995-2003 Ranger Models
30 Review