Latest / The Productivity Podcast with Fexingo: Output, Efficiency, and Long-Term Economic Growth / How One Chip Shortage Reshaped Auto Production
Transcript
- Lucas: If walking through the economy with us has made something click about how stuff actually gets made, today's episode is a perfect example of why those details matter. We're talking about the semiconductor shortage that hit the auto industry in 2021 — but not the broad story everyone remembers. I want to zoom in on one specific fire at one specific factory. Luna: A fire? Like, a literal fire in a chip plant that stopped car production around the world? Lucas: Exactly. In March 2021, a fire broke out at a Renesas Electronics plant in Hitachinaka, Japan. Renesas is one of the world's biggest suppliers of automotive microcontrollers — those tiny chips that control everything from your brakes to your dashboard display. The fire damaged about 600 square meters of cleanroom space, and it took three months to fully restore production. Luna: And this one fire — how much did it actually impact car output? Lucas: Renesas itself estimated the fire destroyed chips equivalent to about 17 million vehicles' worth of microcontrollers. In practice, industry analysts at IHS Markit later calculated that the Renesas fire alone contributed to a global production loss of roughly 1.6 million vehicles in 2021. That's not the whole shortage — there were also winter storms in Texas, drought in Taiwan, and a fire at an AKM plant — but Renesas was the single biggest discrete event. Luna: So one fire in one facility, and suddenly carmakers from Detroit to Stuttgart to Shanghai are scrambling. How did a single point of failure become that critical? Lucas: It comes down to how the auto industry managed its chip supply chain for decades. Carmakers famously pioneered just-in-time manufacturing — Toyota developed it in the 1950s and 1960s. The idea is you keep minimal inventory and rely on frequent, precise deliveries from suppliers. It's incredibly efficient when everything runs smoothly. But it also means there's almost no buffer when something breaks. Luna: And this was a case where the supply base itself was highly concentrated. Renesas, NXP, Infineon, STMicroelectronics — a handful of companies control most of the automotive chip market. Lucas: Right. And within Renesas, that one Hitachinaka plant produced about two-thirds of its automotive microcontrollers. So a fire in a single building became a bottleneck for the entire global auto industry. The chips Renesas makes are usually low-margin, mature-node parts — 40 to 90 nanometer technology, nothing cutting-edge. But they're deeply embedded in vehicle designs. Carmakers can't just swap in a chip from another supplier without redesigning the circuit board — a process that takes 12 to 18 months. Luna: Which means the shortage wasn't about capacity in the abstract — it was about specific, qualified parts for specific models. And carmakers had no plan B. Lucas: Exactly. Toyota actually fared better than most in 2021 because they had a business continuity policy dating back to the 2011 Fukushima earthquake. They required suppliers to keep a minimum of two months of chip inventory. But even Toyota eventually had to cut production. By September 2021, they announced a 40 percent reduction in global production for October. That's how deep the shortage was. Luna: So what's changed since then? Are carmakers just hoping it doesn't happen again? Lucas: No, they're actually making structural changes — and this is where the productivity angle gets interesting. The traditional model was that carmakers outsourced chip procurement to their Tier 1 suppliers, like Bosch or Continental. Those suppliers would design the electronics and buy the chips. The carmakers didn't even have direct relationships with chip foundries. After the shortage, that's reversing. Luna: Ford, for example — they announced in 2022 that they were partnering directly with GlobalFoundries, the chip manufacturer, to secure capacity. That's a huge departure from the old model. Lucas: It is. And it's not just Ford. General Motors, Volkswagen, Toyota — all of them have either signed direct supply agreements with foundries or started building their own chip design teams. The idea is to shorten the supply chain and gain visibility into what's actually happening at the fab level. Some are even talking about building their own inventory buffers — holding 60 to 90 days of chip stock instead of the near-zero levels they kept before. Luna: Which sounds like a productivity trade-off. Holding inventory costs money — it ties up capital, requires warehouse space, increases obsolescence risk. But the cost of not having the inventory when you need it can be much higher. Lucas: That's exactly the calculus. A car sitting on the assembly line waiting for a two-dollar chip can cost a manufacturer hundreds of dollars per day in lost output. The auto industry is now realizing that the old just-in-time model for chips was a false economy — it saved a little on inventory but created enormous vulnerability. So they're moving toward a 'just-in-case' model for semiconductors, with strategic buffers. Luna: And there's also a redesign dimension. Carmakers are starting to standardize the chips they use across models, so they're less dependent on custom parts that only one supplier makes. Lucas: Yes. That's a longer-term shift, but it's happening. If you look at the average new car today, it has something like 1,000 to 3,000 chips. Many of those are unique to a specific model or even a specific trim level. By consolidating chip types and designing platforms that use the same microcontrollers across multiple models, carmakers reduce the number of distinct parts they need to source. That gives them more bargaining power and more flexibility when one supplier has a problem. Luna: So the overall effect of the shortage — as painful as it was — might actually make auto manufacturing more resilient and, in the long run, more productive. Because you're building in slack where it matters. Lucas: I think that's right. And this is a pattern we see in many industries: a crisis reveals a hidden fragility, and the response makes the system stronger. The chip shortage cost the auto industry about $210 billion in lost revenue in 2021 alone. But the changes carmakers are making now — direct fab relationships, inventory buffers, chip standardization — those are investments that will pay off over the next decade. Luna: It's a good reminder that productivity isn't just about squeezing out every bit of cost — it's also about building in resilience so you can keep producing when things go wrong. Lucas: If today was actually useful to you, the way these conversations stay ad-free is listener support. It's buy me a coffee dot com slash fexingo. That's it — no tiers, no perks, just a way to keep the show going if you find value in it. Luna: Yeah, it really does help us keep doing this kind of deep dive without any sponsor pressure. And we appreciate every single one. Lucas: So next time you see a new car on the lot — and nowadays there are more cars on lots than there were in 2022 — remember that part of that availability came from a fire in Japan and the industry's decision to never let that happen again. That's the kind of productivity improvement that doesn't show up in a quarterly report but makes the whole system work better. Luna: Looking forward to see if chip standardization really takes hold. If it does, it could be one of the biggest operational shifts in auto manufacturing since the moving assembly line. Lucas: We'll be watching. That's it for today. I'm Lucas. Luna: And I'm Luna. Talk to you next time.