Does your BMW have a GM Transmission? Parts sharing is not uncommon among manufacturers and many times they strike up deals so they can get parts quickly without additional engineering costs. Here are a few examples of some of the most unexpected parts shared by manufacturers.

10. Five Speed Automatic Transmission - BMW E39 5 Series and many GM Vehicles

BMW went to GM for an Automatic transmission to be used in their E39 5 Series as well as the E46 3 Series. This transmission is known as the 5L40E and is built in France for GM. It was used in many GM vehicle including the CTS, STS, and Saturn Sky.

9. RV's With Car Parts

Due to the high cost of production for injection molded parts, most RV's use headlights and tailights from smaller passenger vehicles. Here is one with VW headlights

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8. UPS truck with Oldsmobile headlights

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What do you do when you need a new headlight design for a UPS truck? You visit the parts bin of a defunct brand. If you have noticed some odd looking headlights on UPS trucks, it is because they are using Oldsmobile Alero headlights.

7. Rolls Royce and Bentley Head Units of the 80s

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Rolls Royce and Bentley used Delco Head Units in the 80s which usually showed up in many GM vehicles so these luxury cars shared parts with things like the Chevrolet Celebrity

6. Ford GT and Ford Focus Switches

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The Ford GT borrowed from the Ford parts bin for a lot of parts but the most easily noticed are the door and mirror switches which came straight from a similar vintage Ford Focus

5. Focus SVT and Mini Cooper S transmission

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The sporty versions of the Focus and the Cooper both sourced their transmission from Getrag and once you get down to the nuts and bolts you can see that they are basically the same transmission save the bellhousing and slightly different ratios

4. Dodge Caravan Minivan

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Chrysler picked up a few parts from the Caravan including the airbox which it stuck into the Plymouth Prowler and the taillights whicht hey stuck onto the back of the Durango

3. C5 Corvette Door Handles

GM went into its parts bin and picked the most boring car it could find, the Oldsmobile Aurora and then took its exterior door handles and stuck them on the C5 Corvette

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2. A Saturn With a Honda Engine

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As part of a deal between GM and Honda, GM was able to use the 3.5L V6 (J35A3) from the Honda Pilot in the Saturn Vue and in return Honda got to use some diesel engines from GM's Isuzu division. The interesting part of the whole deal is that the Vue actually made 10 more horsepower than the Pilot.

1. Pontiac Solstice/Saturn Sky

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The Solstice and Sky were just plain parts bin bastards. Here are just some of the items picked up from other manufacturers or models:

  • The base 2.4L engine comes from the Chevy Cobalt.
  • The transmission comes from the Chevy Colorado, which itself was a redesign of a Toyota Supra transmission from the 80s.
  • The mirrors come from the Fiat Barchetta.
  • The backup lights come straight off the GMC Envoy SUV.
  • The rear differential comes from the Cadillac CTS.
  • The HVAC equipment comes off the Hummer H3.
  • Steering Wheel comes from the Chevy Malibu.
  • Airbags and door handles also come from the Cobalt.

Bozi is the founder of Hoonable.com and creates articles on everything from engine swaps to late model car restorations. You can follow him on Twitter and Facebook or drop him a line at Hoonable!

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