BMW i3 Repair Process Deep Dive

 

Occasionally I cross post content from other websites here (with permission of course) when I think the article is both interesting and exceptionally well done. Such is the case with this post written by Chuck Vossler of BMWBLOG about the repair process of the i3. I think Chuck may have taken particular interest in this story since he recently revealed to me that he has indeed ordered an i3 for his personal use. I have also been talking with him for the past year about his interest in solar electric and am happy to say he has indeed installed a solar array on his home and will soon be joining me in driving his i3 on pure sunshine, or "driving the future" as I like to say. Electric vehicles combined with solar electricity are such a fantastic combination, and adding the second one to your life is such a natural decision to come to once you have the first, as long as it's physically and financially possible to do so.

The entire article and pictures below were written by Chuck Vossler and appeared first on BMWBLOG.

The BMW i3 is truly a revolutionary new car. Revolutionary, however, is not exactly what the repair shop wants to hear when it comes to …

The BMW i3 is truly a revolutionary new car. Revolutionary, however, is not exactly what the repair shop wants to hear when it comes to fixing a totally new car. Never before has any manufacturer made such extensive use of carbon fiber in a mass produced car. One of the main benefits of the Carbon Fiber Reinforced Plastic used in the BMW i3′s Life Module passenger compartment is that it weighs about 50 percent less than traditional steel and also about 30 percent less than aluminum. The Drive Module houses a 22 kWh battery, the chassis and the 170 hp electric motor. Therefore, the new lightweight materials used in the i3 comes with totally new repair processes.


BMWBLOG had the opportunity to tour the BMW North America training facility where technicians for U.S. dealerships come to learn how to repair the very unique lightweight i3. Most consumers won’t really care about the details of how the i3 is repaired but one thing they will care about is what the BMW i3 costs to insure. The more complex and expensive the repair, the higher the insurance premium. A more complicated and challenging service and repair process directly leads to higher ownership costs which will ultimately impact sales.

Fortunately, BMW states that the cost of repairs for the BMW i3 are similar to a BMW 1 Series. This is intriguing given that once a carbon fiber piece is broken, there just is no repairing of it. The entire part/body panel must be replaced. Nonetheless BMW knew the implication of building a car of CFRP and thus designed specific cut away sections in the i3. These are defined segments that when cut will allow the technician to remove the damaged CFRP piece and then bond the new CFRP segment back in with glue.


THE DRIVE AND LIFE MODULES
BMW constructed the i3 in two segments, the Drive Module and the Life Module. The Drive Module contains the electric motor, suspension, lithium ion battery and is the backbone of the car. This module is made mostly of aluminum and its repair process is very similar to other aluminum chassis components that BMW has been producing and repairing for years.

The i3's mostly aluminum Drive Module

The Life Module is the occupant cabin and its backbone is made of Carbon Fiber Reinforced Plastic. This frame and roof are all CFRP where as attached to the sides of the i3 are composite plastic panels. These panels are designed to absorb what would normally dent a metal car and pop back into shape. Added bonus: your i3 isn’t gonna rust.

Aluminum: BMW states that standard “Cold” repair methods for the aluminum components will be used in repair. These include bonding and riveting. These methods have been used by BMW workshops since 2003.

Panels: BMW designed the panels to be replaced via standard screw/clip on plastic plated parts, so not much different really than a standard car.

Glass: The CFRP body which is surrounding and holding the glass can be damaged by a standard glass removal tool, so there is a special tool required here. Overall the mechanism of removing and replacing is similar. Standard glass removal tool uses a strong metal wire that would damage the carbon fiber, so BMW’s tool has something like a super strong fishing line.

Even replacing the glass on an i3 requires a different process and tools

Carbon Fiber Body: This is where repair techniques change significantly from standard cars. There is no pounding out damaged CFRP. In order to repair the i3, the damaged section will need to be cut out at one of the predefined points. These are located at the top of the A, B, C pillars as well as forward and aft of the floor pan.

BMW requires a specialized cutting device that looks part bone saw on the business end and part Dr Who Villain, a Dalek, to vacuum up the carbon fiber particles. Once the carbon fiber body has dis-articulated at the very specific points, the technician then places the new section on and bonds/glues it back together.
This is where my favorite part of the tour came. “This isn’t very complicated but it needs to be very precise,” says a BMW technician. He further added that the time it will take to repair i3 electric vehicles will actually be less than standard cars and thus decreased labor costs with auto repair.

BMWBLOG is happy to report that the insurance cost for the BMW i3 is similar to a 1 Series Coupe. Adding a BMW i3 to my automobile insurance policy will only raise the monthly payment by $42. Take that with a grain of salt as car insurance policies range all over the place depending on driving history, use and location.

The BMW i3 has a 22kWh battery powering a 170 hp electric motor good for an 80 mile range. It has been tested as the most efficient electric car available on the market due to its low weight with extensive use of Carbon Fiber Reinforced Plastic: 124 MPGe. The Range Extended version has a small generator in it which never directly drives the vehicle’s wheels but rather charges the battery while adding roughly 330 lbs to the vehicle curb weight.

BMW i3 Production Delays Reported

Virtually every facet of the i3's manufacturing process is different and BMW is evidently struggling to manage setbacks

According to Jay Cole over at insideevs.com i3 production is currently 50% lower than expected at this point in time. Cole's source is Manager Magazine Online, a German Publication, which states the high rejection rate of the carbon fiber parts made for the car. The article goes on to say that BMW's recent announcement that the company will be investing another 100 million euros to increase the production of carbon fiber is tied to this issue.

Manager also says BMW is only churning out 70 i3's per day which is about half of what they were hoping to be making by now. BMW began i3 production in October so they are four months in and now have over 11,000 i3's on backorder. Plus, US sales are only just beginning so it would appear that even if BMW gets the current problems solved in short order (and that's a big "if"), it will still probably take them nearly a year to catch up with demand since the orders will continue to pile up. It has long been speculated that BMW will have the capacity to make between 30,000 and 40,000 i3's per year once they are running at full production.

It seems we now have some answers to two things which were puzzling US customers recently. A couple months ago BMW announced that US i3's will not have a moonroof available. This comes long after it was announced that the i3's with Giga World and Tera World interiors get the moonroof included with the packages. To make matters worse, most of the i3's here in the US are pre-production European spec cars and they all have sunroofs. So everyone that had the opportunity to test drive an i3 got teased with seeing the moonroof that they were later told they won't be able to have. Then, a few weeks ago BMW announced the first three months of i3 US production would be limited to a "Launch Edition" version. The Launch Edition is fully loaded with every option available on the car and the most expensive Tera World interior. The only thing the customer can choose is the color (and only the metallic colors are available) and if they want the optional 20" sport wheels.

Many people speculated that is was simply a money grab and BMW knew the car would be in high demand so they could get away with making anyone that wanted one of the first i3's in the US buy one that was loaded. Now, with the recent news about production difficulty, I think it's obvious the reasons the moonroof isn't available at launch, and custom ordering isn't available for another three months, is solely because BMW is struggling to refine the manufacturing process and eliminate the problems they are currently having.

I've had the opportunity to talk with many BMW program managers over the past few years. One of the things that has always stood out to me was how on one hand they were really excited about the i3 because of how special and different everything about it is, while on the other hand they would always acknowledge how big a challenge it was going to be. Everything about the i3 is different. BMW has never made a car that required special manufacturing processes for virtually every stage of assembly. Besides the electric powertrain, most of the materials used in the car are even different. While the biggest challenge is likely working with carbon fiber on such a large scale, they are also using more aluminum on a car than they ever have and are using interior materials that they have never worked with before. Then there is the outer thermoplastic body panels which BMW has never used before which has even led to the painting process presenting challenges.

So personally I'm really not surprised by all this. The i3 is a revolutionary new car for BMW, and nobody else is making anything quite like it. Yes, there are some that will look at it and say "It's just another 80 mile electric car, big deal", or "It's nothing more than a Nissan LEAF that costs $50,000". I respect everyone's opinions, and for some people it doesn't represent any more value than a $30,000 Nissan LEAF and that's fine. However when I see the i3 I see the future of the automotive industry and I applaud BMW for taking the enormous risk of building such a radically different car, something that nobody else is attempting to build. Yes, I wish it had more range and I think BMW would have been better served if it could really deliver 100 miles of consistent real world range for most drivers, and it's clear it will not. But that's the biggest knock I can offer and it's far from a deal breaker for me. BMW will get past these initial manufacturing snafu's. The top concern at this point should be quality, which I'm sure it is. The production numbers will increase and by the end of the year I'm sure they will have everything running as smoothly as planned. The question is will the customers wait many months for their i3 to be made? I suppose the people that don't put as much weight on how special it is may not, but those that appreciate how unique the car really is will. After all, there is nothing else out there they can get that is quite like the i3.