Most Reliable Engines from the Top 10 Car Manufacturers
Engine reputation is earned over decades, and a handful of designs have earned theirs the hard way: hundreds of thousands of miles in daily service. If engine dependability tops your list for your next car (or your next project purchase), these ten are the ones enthusiasts and mechanics keep pointing to, one from each of ten manufacturers.
BMW - M50
BMW has been building engines since 1916, and the M50 straight-six of the early 1990s is one of the sturdiest it ever made. With an iron block, simple management, and honest maintenance, these engines are commonly credited with running well past 300,000 miles, which is why clean E34s and E36s still command respect.
Chevrolet - Small Block 350
The small block 350 is arguably the most proven V8 design in American history: tens of millions built, parts everywhere, and a tolerance for neglect that borders on legendary. One famously documented example ran into seven figures of mileage, and the later LS family carried the same easy-to-own modularity forward.
Honda - K20A
Honda built its American reputation on efficient engines that refuse to die, and the K20A is the modern flagbearer: a high-revving VTEC four that delivers sports-car character with commuter-car durability. Well-maintained K-series engines routinely clear 200,000 miles, which is why they remain a favorite swap into everything.
Mazda - BP - Z3
The BP family powering the early MX-5 Miata is a case study in simple done right. Owners debate V8 swaps, but the original four more than lives up to Mazda’s reputation: rev-happy, cheap to keep, and durable enough that most Miatas outlast several sets of tires’ worth of owners.
Nissan - SR20DET
Nissan has built some of Japan’s most emblematic performance engines, from the 300ZX’s VG30DETT to the GT-R’s VR38DETT. The SR20DET earned its place as the accessible one: a turbocharged four that takes power upgrades in stride and keeps running, which is exactly why it became a tuning-scene staple worldwide.
Porsche - M96
The M96 water-cooled flat-six carried Porsche into the modern era in the Boxster and 996-generation 911. Its reputation comes with a footnote: stay on top of maintenance, including the well-known intermediate shaft bearing service, and these engines reward owners with the everyday usability that made water-cooled Porsches a success in the first place.
Saab - B235R
Saab no longer builds cars, but its engineering legacy lives in engines like the B235R: a 2.3L turbocharged inline-four from the 9-5 Aero era. Kept on good oil (the known sludge-era caveat), these Swedish turbos proved remarkably long-lived, with well-cared-for examples reaching mileages most owners never ask of a car.
Toyota - 3RZ - FE
Toyota’s truck reputation rests on engines like the 3RZ-FE, the 2.7L four found in Tacomas and 4Runners of the 1990s and 2000s. It is not fast, and it does not care: these engines shrug off hard use and high mileage, which is why used Toyotas with 3RZ power still sell quickly at strong prices.
Volkswagen - 1200cc
The air-cooled 1,200cc flat-four in the classic Beetle powered one of the best-selling vehicles of all time, and its genius is serviceability: simple enough to rebuild on a bench, tough enough to cross continents. Millions of them did exactly that, and survivors still run daily around the world.
Volvo - B20D
Volvo’s old red-block fours are the stuff of longevity legend, and the B20 tops it: the highest-mileage car in the world is a 1966 Volvo P1800 whose 2.0L inline-four covered more than 3 million documented miles with its original owner. Safe, understated, and nearly unkillable is a fair summary of the breed.
Conclusion
Every engine on this list earned its reputation across decades and millions of collective miles, which is exactly why the cars carrying them keep changing hands between enthusiasts nationwide.
And when you buy one of them three states away, that is where we come in: Ship A Car, Inc. transports daily drivers on open carriers and classics like these in enclosed trailers, door to door anywhere in the country. Price the move with the instant calculator or contact a Ship A Car representative at (866) 821-4555 today.
