BMW

Overview The BMW 335i from the E90 and E92 generation (2007–2013) sits right in that weird spot where BMW started mixing old-school drivetrain engineering with newer, more complicated tech. Turbo inline-six up front. Several transmission designs behind it. Rear-wheel drive for the purists, xDrive AWD for the snow states. On paper it’s a pretty tough…

Overview The G20 BMW 330i showed up for the 2019 model year and BMW simplified the drivetrain layout compared with some older 3-Series generations. One engine. One transmission. No dual-clutch experiments. No manual options in the U.S. Just the turbocharged B46/B48 four-cylinder and ZF’s eight-speed automatic. The transmission BMW uses here is the GA8HP51Z, part…

Overview The E90 BMW 330i sits in an interesting spot in BMW history. Not old-school mechanical like the E46. Not yet drowning in electronics like the F30 generation that came later. Right in the middle. Transitional hardware. Some of it excellent. Some of it over-engineered in that very BMW way. Transmission-wise, this platform is built…

Overview The E90 BMW 328i from 2006–2011 sits in a weird spot in BMW history. Before the turbo explosion. Before everything became packed with electronics. Back when the 3-Series was still a fairly mechanical car underneath. That matters when we talk transmissions and driveline parts. This platform runs the naturally aspirated N52 or N51 inline-six,…

Overview The BMW 330i from the E46 generation (U.S. model years 2001–2006) runs a pretty traditional BMW drivetrain layout. Longitudinal inline-six up front. Transmission bolted straight behind it. Driveshaft down the tunnel. Differential out back. Old-school BMW architecture. And honestly? It works. I’ve worked on these cars for years. Seen hundreds come through shops —…

Overview The BMW 328i from the F30 generation (2012–2016 for the actual 328i badge in the U.S.) runs a drivetrain that, mechanically speaking, is far more modern than the older E90 cars. ZF’s 8-speed automatic sits at the center of most of these cars. Some manuals exist. Not many. Rear-wheel drive is the standard layout,…

Overview The BMW 325i from the E90 generation — 2006 through 2011 — uses a very traditional drivetrain layout. Longitudinal inline-six engine. Transmission bolted right behind it. Driveshaft running to the rear differential. Simple. Clean. BMW had been doing it this way for decades. Rear-wheel-drive cars stay simple. One driveshaft, one differential. xDrive models add…

Overview The E46 BMW 325i from 2001–2006 sits in that weird space where the car itself is fantastic… but the transmission story depends entirely on which gearbox ended up in the tunnel. I’ve worked on these cars for years. Independent shops. Dealer overflow work. High-mileage commuter cars. Weekend toys. Same platform, wildly different outcomes depending…

Overview The BMW 323i from the E90 generation (2006–2011) runs a classic BMW drivetrain layout. Longitudinal engine. Transmission behind it. Driveshaft down the tunnel. Rear differential pushing the car. Old-school BMW architecture. And honestly? From a Master Tech perspective, that layout is one of the reasons these cars are still on the road. No transverse…

Overview The seventh-generation BMW 3-Series (G20) hit the road in 2019. Under the skin of the 320i sits a drivetrain combo I’ve worked on more times than I can count: the B48 turbo four paired to ZF’s 8HP automatic. Good hardware. Really good hardware actually. The transmission itself? Tough unit. I’ve seen plenty cross 150,000…

Overview The BMW F30 320i (2012–2018) sits in an interesting spot. Entry-level 3 Series. Turbo four-cylinder. Same chassis architecture as the bigger engines but with a lighter drivetrain load. On paper it looks simple. In the shop, things look a little different. I’ve worked on a lot of these cars over the years. Independent BMW…

Overview The BMW E90 3-Series ran from 2005 through 2011. The 320i sits at the bottom of that lineup with a 2.0-liter four-cylinder. Simple engine. Pretty straightforward drivetrain layout too. Rear-wheel drive, longitudinal engine, one driveshaft, rear differential. But the transmissions? Mixed bag. BMW installed three different gearboxes depending on the build spec. The GS6-17BG…

Overview The BMW 318i from the E46 generation (1998–2006) sits in a weird spot in BMW drivetrain history. Small engine. Small tranny. Smaller differential. On paper that sounds like a weak setup. In real service bays it often works the other way around. Less torque means less stress. And less stress usually means fewer catastrophic…

Overview The BMW 135i E82 sold in the U.S. from 2008 through 2013 looks simple underneath. Rear-wheel drive. Straight six up front. Transmission bolted to the back like BMW has done for decades. On paper it’s clean engineering. Reality in the shop? A little messier. I’ve worked on a lot of these cars. Dealer days….

Overview The BMW 128i from the E82 generation (2008–2013) runs a pretty old-school drivetrain layout. Rear-wheel drive. Inline six. Conventional driveshaft. No AWD hardware, no transfer case, no fancy dual-clutch box hiding under the tunnel. Simple by BMW standards. And that simplicity matters. I’ve had a lot of these cars come through the shop over…