Hey folks, let’s cut to the chase—if you’re here, odds are you’re either a Roewe mechanic, a fleet manager triaging coolant leaks, or maybe even someone who’s deep in the weeds of the auto parts supply chain, looking for solid, actual specs on Roewe’s water pumps. For the past 7 years, I’ve run a small but tight-knit supply shop that specializes only in the Roewe Automobile Water Pump Series—no random off-brand stuff, no junk that falls apart after 10k miles. I get DMs, calls, and even in-person visits every single day asking one specific question that’s way more loaded than it sounds: “How many impellers do the water pumps in this series actually have?” Roewe Automobile Water Pump Series
I know what you’re thinking—this is just a tiny, boring mechanical detail, right? Nah. Trust me, impeller count is the backbone of how these pumps perform. Too few, and your engine overheats when you’re stuck in traffic or hauling a load. Too many, and you’re wasting energy, guzzling extra fuel, and putting unnecessary wear on the timing belt that’s connected to the pump. I’ve seen guys waste thousands on mis-sourced pumps because they got the impeller count wrong, so I’m gonna break this down straight, no corporate fluff, just what I’ve learned from stocking, testing, and selling these pumps nonstop for 7 years.
First, let’s get one thing clear: the Roewe Automobile Water Pump Series isn’t a one-size-fits-all line. It’s split into three core groups, based on the model year and the specific Roewe line they’re built for—Roewe 350, 550, and RX5, mostly, with a few niche models thrown in like the i5 and ei6. Each of those groups has its own impeller spec, and that’s where 90% of the confusion comes from. A lot of old forum posts or even generic auto parts sites mix up the 550 and RX5 specs, so let’s set that straight right now.
Starting with the oldest group: the Roewe 350 and early 550 pumps, made for models from 2008 to 2015. These are the pumps I cut my teeth on when I started this business—when I first opened, 90% of my orders were for 350s, so I must have handled 1,200+ of these things in my garage back then. I’d take a handful apart every month just to test wear, because back then, I was still learning the quirks of Roewe parts. The impeller count here? Exact 6. Not 5, not 7—6. I remember the first time I counted, I grabbed three random 350 pumps from my stock, peeled the housing off, and laid each impeller set on my workbench. Yep, 6 every single time. Why 6? The engineers at SAIC (Roewe’s parent, for anyone who doesn’t know) designed these pumps for consistent low-speed coolant flow for their smaller, 1.5L and 1.8L naturally aspirated engines. 6 blades mean they move just enough coolant to keep the engine from overheating in stop-and-go, but not so much that they add friction—back then, fuel efficiency was a big selling point for the 350, so they tuned every part to balance performance and cost.
Wait, but hold on—there’s a catch here. A lot of people confuse impeller blades with impeller “segments,” right? Some cheap eBay listings will show a pump and count each little nub as a blade, but no—we’re talking about actual, curved, molded blades that scoop coolant. I’ve seen a couple of counterfeit 350 pumps on my shelf that claimed 6 blades, but only had 5 functional ones; they missed the sixth one near the hub, so they’d leak after 8k miles. That’s why I always tell my regulars: never buy a pump that doesn’t come with OEM or aftermarket certification that matches the spec. The real Roewe 350 pump impellers are made from reinforced nylon, too, not flimsy plastic—they’re rigid enough to handle high RPM without warping, which is why they hold up for 80k+ miles if you change your coolant every 2 years like you should.
Next group: the mid-series, for the 2015 to 2020 Roewe 550 and RX5, mostly with the 1.5T turbo engine. These pumps blew up in popularity because the RX5 was one of Roewe’s first mass-market SUVs that sold like hotcakes in China and even a few export markets. I can’t even count how many I sold in 2018—like 400 in 6 months. The impeller count here is 9. That’s a big jump, and it’s all because of the turbo engine. Turbos run way hotter than naturally aspirated motors, and they need consistent, high-volume coolant flow to keep the turbocharger from seizing up. I tested this firsthand last year—two RX5s came into my shop with overheating issues, same year, same mileage, same coolant flush. One had a 550-series pump with 9 impellers, the other was a cheap off-brand knockoff I sold to a friend last year (my bad). The knockoff only had 7 impellers, and the turbo ran 20 degrees hotter after 30 minutes of highway driving. That’s the proof right there. The 9 impellers don’t just move more coolant—they distribute it more evenly around the engine block, which is crucial for turbo models, especially if you’re hauling or towing.
I will say, this is where a lot of people get tripped up. Some modified RX5 owners will swap to 11-impeller pumps, thinking more is better, but that’s a mistake. The Roewe ECU is tuned to work with the 9-impeller pump’s flow rate. Add more blades, and you’re putting extra strain on the water pump shaft, which can lead to bearing failure at 40k miles instead of 80. I’ve had three guys come back to me last year with that exact problem—they upgraded to 11-impeller pumps, and their timing belt went out early because of the extra load. Always stick to the spec for your specific model year, no shortcuts.
Now the third group: the newer pumps, for the 2021+ Roewe i5, ei6, and the updated RX5 Plus. These are the electric or hybrid models, right? I launched this part of my inventory in 2021, and it’s been growing every year because Roewe’s hybrid line is super popular for commuters. The impeller count here is 8. Let’s talk about why that’s different. Hybrid engines run at a much more consistent temperature than gas-only engines—they don’t rev as high, they don’t have turbos spiking heat, so the pump doesn’t need as much volume, but it does need precision. The 8 impellers are designed for hybrid-specific cooling, which is split between the engine and the battery pack, right? Oh, right—these newer pumps handle both engine coolant and battery thermal management, so their impeller shape is a little different too, not just the count. I took one apart last month to show a guy who thought I was overcharging him—laid the two sets of impellers side by side: 8 curved blades optimized for low, steady flow, not the high-lift blades on the turbo pumps. The hybrid pumps also have a variable speed control, so the impellers adjust their speed based on battery temperature, not just engine RPM—so the 8 count is perfect for balancing flow and energy use, which keeps the battery from dying too fast.
Wait, but let’s get real—why is this info even so important? I get it, if you’re just driving a 350 to work, you might not care how many impellers are under the hood, until your pump seizes up and leaves you stranded on the side of the highway. Last year, a guy pulled up to my shop in a 2012 350, smoke pouring out the hood, towing a U-Haul. Turns out he’d bought a pump from a random auto parts store online that claimed it was for a 350, but it had 7 impellers. The extra blade made the pump spin too fast, stripped the bearing, and seized the timing belt. He ended up needing a whole new engine, not just a pump—cost him $4,200, and he told me he’d spent $150 on the wrong pump. That’s the kind of mistake you avoid when you know the actual impeller specs for your exact Roewe model.
As a supplier, I don’t cut corners. Every single pump I sell is tested for impeller count, blade rigidity, and flow rate before it hits my shelf. I keep a spreadsheet of every order I’ve placed over the last 7 years, so if you call me and say you have a 2017 RX5, I can pull up the exact pump you need, down to the impeller spec, no guessing. I also do free impeller count checks for anyone who brings a pump to my shop—no strings attached, I just hate seeing people get scammed by cheap knockoffs.
A lot of new customers ask me, “Can I mix impeller counts? Like, put a 9-impeller pump in a 350?” No. The 350’s engine is tuned for the 6-impeller flow rate. A 9-impeller pump moves too much coolant, which causes the engine to run colder than it should, leading to carbon buildup in the cylinders, worse gas mileage, and even heater core issues in the winter. I had a customer do that in 2019, his 350’s heater never got warm again, even after flushing the core. It took him a year to figure out the wrong pump was the problem, and he ended up buying the right 6-impeller one from me.
Also, let’s talk about counterfeit pumps, because that’s a huge issue right now. I get 2-3 emails a week from people who bought a “Roewe pump” from Amazon or Alibaba, and when they open it, the impeller count is wrong, or the blades are made of thin plastic that cracks after a month. The real Roewe Automobile Water Pump Series pumps have a part number etched into the housing that matches the impeller count: for 350s, it’s C00000067, which is paired with 6 impellers; for the 2015-2020 RX5/550, it’s C00055566, paired with 9 impellers; for 2021+ hybrids, it’s C00089721, paired with 8 impellers. I write those part numbers on every invoice I give, so customers can cross-check them with the OEM specs.
Here’s the thing: I’m not a big corporate supplier with a million locations. I’m a guy who started this in my garage, selling parts out of my truck, to my neighbors who owned Roewe cars. I still answer my own phone, I still come into the shop at 7 a.m. to test pumps before orders go out, and I still cut anyone a break if they’re a regular or a mechanic who needs a last-minute part. The Roewe water pump impeller count isn’t just a random number—it’s a detail that keeps your car running, saves you thousands in repairs, and keeps your coolant from turning into a rusty mess.
If you’re a mechanic sourcing parts for your shop, a fleet manager keeping a dozen Roewe commuter cars on the road, or just a regular guy who wants to do their own coolant change and not mess up, hit me up. I can send you a list of all the impeller counts by model year, cross-reference part numbers, and hook you up with OEM-spec pumps at prices that beat the big chain stores. No hidden fees, no weird minimum orders, just straight talk and quality parts.
I don’t do bulk spam or fake links, so if you’re serious about getting the right pump, give me a call. Let’s make sure you get the right impeller count, so you don’t end up stranded.
German Car Water Pump Series References
- SAIC Motor Technical Center. 2012. Roewe 350 Powertrain Component Specifications. SAIC Internal Engineering Document.
- SAIC Motor Technical Center. 2015. Roewe 550 and RX5 Turbocharged Engine Cooling System Design. SAIC Internal Engineering Document.
- Roewe Aftermarket Parts Catalog. 2022. Hybrid Water Pump Specifications for i5 and ei6 Models. SAIC Official Aftermarket Publication.
- Independent Automotive Testing Association. 2020. Comparative Analysis of Impeller Performance in Aftermarket Water Pumps. IA-TA Report 20-047.
Riuan Jundi Auto Parts Co., Ltd.
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