Best BMW 4 Series Model Years (Ranked) in 2027

The two engines that define the buying decision

Nearly every 4 Series recommendation collapses to a single fork: four-cylinder or six-cylinder, and which generation of each. Everything else — body style, drive layout, trim — is preference. The engine is where money, risk, and long-term satisfaction actually live.

The six-cylinder path runs N55 → B58 → S55/S58. The N55 (2014-2016 435i, 300 hp) is a single-turbo 3.0L that predates the modular B-series architecture. It's a good engine with an aging-parts profile: valve-cover gaskets and oil-filter-housing gaskets seep with heat cycles, and water pumps are a known wear item on high-mileage examples. None of that is catastrophic, but it's a maintenance line item you should price into the purchase rather than discover at 90,000 miles.

The B58 that replaced it for 2017 is the reason the 440i tops this ranking. It makes 320 hp and 330 lb-ft, runs to 60 mph in roughly 4.7 seconds with the ZF eight-speed, and has developed a reputation as one of the most durable modern turbocharged engines BMW has produced. Its closed-deck block, integrated exhaust manifold, and generous stock hardware margins mean it tolerates both neglect and tuning better than its predecessors. The same engine, in higher-output 382 hp mild-hybrid form, powers the 2021-2024 M440i — which is a meaningful signal about how BMW itself rates the design.

The four-cylinder path runs N20 → B48. This is where the real cliff sits. The N20 (2014-2016 428i, 240 hp) is a competent, economical engine with a documented weak point: timing-chain and chain-guide wear, plus oil-pump drive hardware concerns. When those components fail, they don't fail gracefully. The B48 that replaced it for 2017 addressed the design and has been unremarkable in the best sense — 248 hp, roughly 5.5 seconds to 60, and no signature failure mode. The G-series version adds a 48-volt mild-hybrid starter-generator and 255 hp.

So the practical read: 2017 is a hard dividing line. Cars built after the LCI update get better engines on both sides of the four/six split, plus revised steering calibration, retuned dampers, and upgraded interior materials. Cars built before it are cheaper for reasons that are not purely cosmetic.

Body style is the easier variable. The F32 coupe is the purest shape and the lightest. The F33 convertible uses a retractable hardtop — coupe-like refinement when closed, real open-air driving when not, at the cost of weight, complexity, and a hydraulic system that needs verification. The F36 Gran Coupe is the sleeper of the range: a fastback four-door with a hatch opening and genuinely usable rear seats, which makes it the only 4 Series that works as a sole household car. The G-series equivalents (G22 coupe, G23 convertible with a soft top, G26 Gran Coupe) carry the same logic forward, with the caveat that the enlarged vertical kidney grille is a genuine dealbreaker for some buyers and a non-issue for others. That is a taste question, not a quality question, but it moves resale.

How to decide between them

Start with budget, because it eliminates the most options fastest. Then work down through engine, body, and drivetrain.

If your ceiling puts you in pre-LCI territory (2014-2016), the six-cylinder 435i is the better buy than the 428i — not because the N55 is flawless, but because its failure modes are gasket-and-pump wear you can inspect for and budget, while the N20's failure mode is a timing-chain event with a repair bill that can exceed the car's value. If a 428i is the only thing in range, demand paperwork showing the timing chain, guides, and oil-pump hardware were inspected or replaced. No paperwork, no purchase.

If you can reach the 2017-2020 LCI cars, the question becomes how much you value the extra 72 hp and the sound of a straight-six. The 430i is quicker than most drivers need and cheaper to insure, fuel, and tire. The 440i is the one people keep. Both share the same refreshed chassis and cabin, so you're paying purely for the powertrain.

If you're shopping 2021-2024 G-series, you're buying tech, remaining warranty, and modern driver assistance more than you're buying a better driving experience. The G22 430i is more comfortable and more insulated than the F32; whether it's more engaging is genuinely debatable. The M440i splits the difference — B58 power, standard xDrive in the US market, roughly 4.3 seconds to 60 — and is arguably the smartest all-round purchase in the second generation.

Drivetrain: xDrive is worth it if you see real winter. It adds weight and a small efficiency penalty, and it dulls the rear-drive character slightly, but it transforms cold-climate usability. In a dry climate, rear-wheel drive is the more rewarding car and typically the cheaper one.

One angle worth naming: the M cars sit slightly outside the ordinary 4 Series calculus. The F82/F83 M4 (2015-2020) uses the S55 twin-turbo 3.0L making 425 hp, or 444-454 hp in Competition and CS forms, with a seven-speed dual-clutch. It's a sharper, harder, more demanding car than any 440i, and it carries the well-documented crank-hub concern — a press-fit hub that can slip under high torque, disproportionately on heavily tuned examples. That single issue reshapes M4 shopping: you are looking for a stock or lightly modified car with continuous history, and you are paying a premium for that provenance. The G82/G83 M4 (2021-2024) moved to the S58, which does not carry the same crank-hub reputation, makes 473 hp (503 in Competition), offers optional xDrive for the first time, and can be had with a six-speed manual in rear-drive form. It is the faster and more usable car; it is also the more polarizing one to look at.

The numbers that separate each option

Power and acceleration first, because they frame the price gaps:

• 428i (N20, 2014-2016): 240 hp, 255 lb-ft
• 435i (N55, 2014-2016): 300 hp, 300 lb-ft
• 430i (B48, 2017-2020): 248 hp, 258 lb-ft, roughly 5.5 seconds to 60
• 440i (B58, 2017-2020): 320 hp, 330 lb-ft, roughly 4.7 seconds to 60
• 430i (B48 mild-hybrid, 2021-2024): 255 hp
• M440i (B58 mild-hybrid, 2021-2024): 382 hp, roughly 4.3 seconds to 60
• M4 (S55, 2015-2020): 425 hp base, 444-454 hp Competition/CS
• M4 (S58, 2021-2024): 473 hp base, 503 hp Competition, roughly 3.4 seconds in Competition xDrive form

The gap that matters most is 430i to 440i: about 72 hp and most of a second to 60. That is a genuinely different car in feel, not a spec-sheet distinction. The gap from 440i to M440i (62 hp across a generation) is smaller in practice than the model naming implies, because the G-series car is heavier.

On ownership cost, the four-cylinder cars win on every recurring line: fuel, insurance, tires (narrower on non-M-Sport trims), and brake consumables. The six-cylinder cars win on resale stability and on the intangible that keeps owners from trading out early. Both use the same eight-speed automatic, which is among the more durable components in the car and rarely the reason a 4 Series ends up in a shop.

On inspection cost, budget for a pre-purchase inspection at an independent BMW specialist regardless of which year you pick. On a pre-LCI car it is not optional. Ask specifically for: cold-start timing-chain noise on N20 cars, oil-filter-housing and valve-cover gasket condition on N55 cars, cooling-system pressure test on anything past 60,000 miles, and a full roof-cycle test on any convertible. Run the VIN through BMW's own recall lookup and the NHTSA database and confirm every open campaign was closed out.

A note on modifications, since the 4 Series is a heavily tuned platform. A B58 with a reputable tune and supporting hardware is generally a non-event; the engine has margin. An S55 with an aggressive tune is a different risk profile entirely because of the crank-hub. And on any car, a tune that was flashed out before sale still leaves the wear behind — check for aftermarket intakes, downpipes, or intercoolers as circumstantial evidence, and price accordingly. Undisclosed modification history is the single most common reason a good-looking used M car turns out badly.

Where run-flat tires are fitted, factor replacement into your first-year budget. They're expensive, they ride harshly as they age, and low-profile M Sport setups collect curb and pothole damage that shows up as bent rims. Many owners switch to conventional tires plus a compressor kit; if the car you're looking at has already made that switch, confirm there's actually a repair kit in the trunk.

Sequencing an actual purchase

The order you do things in changes the outcome more than most buyers expect.

Step one: fix the engine and generation before you look at listings. Buyers who shop by price or color end up with whatever N20 428i was cheapest that week. Decide "2017-2020 440i, coupe or Gran Coupe, xDrive optional" and the search collapses from hundreds of cars to a manageable handful.

Step two: filter on documentation, not condition. A car with continuous dealer or specialist service records and average cosmetics is a better buy than a detailed car with a two-line history. On this platform, records are the product. Ask for them before you drive anywhere.

Step three: verify the VIN independently. Recall status, open campaigns, and reported accident history. A repaired accident isn't automatically disqualifying, but it should move the price and it should be disclosed before you find it yourself.

Step four: pre-purchase inspection, engine-specific. Hand the shop the exact list for that engine family rather than asking for a generic once-over. The failure modes are known and well-documented; a specialist who works on these cars will find them in an hour.

Step five: negotiate against the findings, not the asking price. Deferred gasket work, tires at the wear bars, and an unserviced cooling system are real numbers. Bring quotes.

Step six: baseline the car immediately after purchase. Oil and filter, brake fluid if the date is unknown, coolant condition check, and a full fault-code scan even if no lights are on. Stored codes tell you what the seller cleared.

There's a broader lesson here that applies well beyond one car line, and it's the same discipline that drives good revenue forecasting in any business: the variable that actually determines your outcome is rarely the one being advertised. Dealers market trim, color, and mileage. The thing that decides whether this car costs you $800 a year or $8,000 is which engine family it has and whether someone maintained it. Identify the real driver, filter hard on it, and ignore the noise. Buyers who apply that to a 4 Series search consistently do better than buyers who chase the lowest sticker.

The same framework transfers cleanly to the neighboring BMW lines. The 3 Series shares nearly all of this drivetrain history — the same N20-to-B48 and N55-to-B58 transitions, on the same timeline — so a 330i and a 430i are mechanically close cousins with different roofs. The 2 Series carries the B48/B58 pairing in a smaller package. The X3 and X4 use the same engines in taller bodies. If you learn the engine codes once, you can shop half of BMW's modern used lineup with the same checklist, and the risk map barely changes.

Related questions

Is the 4 Series just a two-door 3 Series?

Mechanically, largely yes — shared platform, engines, and transmissions. The 4 Series gets a wider track, lower roofline, and stiffer default suspension tuning, so it feels slightly more planted. The Gran Coupe blurs the line further by adding four doors and a hatch.

Does the B58 really need less maintenance than the N55?

Not less routine maintenance — the same oil and cooling service applies. The difference is fewer age-related failure points. The N55's gasket and water-pump wear pattern is well documented; the B58 has no comparable signature issue at typical used-market mileage.

Should I worry about the S55 crank hub on a stock M4?

Far less than on a tuned one. The concern scales with torque, so stock and lightly modified cars see it rarely. The practical rule: buy documented history, avoid cars with removed or unexplained aftermarket hardware, and treat a big-power tune as a reason to walk.

Is the Gran Coupe a compromise or an upgrade?

Depends on your use case. It gives up a little rigidity and a little style purity, and gains a hatch opening plus rear seats adults can actually use. For a household running one car, it's an upgrade. For a weekend car, the coupe is the better choice.

How much does the G-series grille affect resale?

It's a real factor in enthusiast demand, though styling preference shifts over time and the G-series cars are still relatively new on the used market. Treat it as a personal-taste decision first; if you dislike it now, you'll dislike it in year four.

FAQ

Which BMW 4 Series model year is the most reliable?

The 2017-2020 cars, and among them the B58-powered 440i. The 2017 LCI update brought both revised chassis tuning and the modular B-series engines, replacing the N20 four with the B48 and the N55 six with the B58. The B58 in particular has a strong durability record and generous engineering margin, which is why BMW continued using it — in higher-output mild-hybrid form — through the second generation.

Which years should I avoid?

Be most cautious with 2014-2015 N20-powered 428i cars, where timing-chain, chain-guide, and oil-pump hardware wear can cause serious engine damage if neglected. They aren't automatically bad buys, but they require documented proof that those components were inspected or serviced. Separately, approach heavily tuned S55 M4s carefully given the crank-hub concern; a stock, well-documented example is a very different proposition.

What's the best-value 4 Series?

A 2017-2020 430i, ideally in M Sport trim. It has the same LCI chassis and interior improvements as the 440i, the dependable B48 four, meaningfully lower fuel, insurance, and consumables costs, and a used price well under the six-cylinder cars. Roughly 5.5 seconds to 60 is quick enough for real-world driving, and the M Sport package adds the body kit, sport seats, and uprated brakes.

How does the second generation compare to the first?

The 2021-2024 G-series cars are more spacious, better equipped, and technologically newer, with iDrive 7/8 and available xDrive across most of the range. They're also heavier and more insulated. The first-generation F32/F33/F36 is often preferred by enthusiasts for its more conventional styling and lighter feel. The G-series' enlarged vertical grille is the most-discussed change and the one most likely to decide the purchase either way.

Are the convertibles less reliable than the coupes?

The drivetrains are identical, so engine and transmission reliability doesn't change. The difference is the roof. The first-generation F33 uses a retractable hardtop with hydraulics and multiple seals — components that can leak or fail with age and that get expensive when they do. Always cycle the roof fully through open and close, check the trunk seals, and listen for hesitation or noise in the mechanism.

What should I check before buying any used 4 Series?

Complete service records above everything else, especially oil-change intervals and, on N20 cars, timing-chain work. Run the VIN through BMW and NHTSA recall databases. Get an engine-specific pre-purchase inspection from an independent BMW specialist. Check for undisclosed modifications on any six-cylinder car. Test every electronic system including iDrive, and inspect wheels for pothole and curb damage on low-profile M Sport setups.

Sources

• https://www.bmwusa.com/
• https://en.wikipedia.org/wiki/BMW_4_Series
• https://www.nhtsa.gov/recalls
• https://www.edmunds.com/bmw/4-series/
• https://www.kbb.com/bmw/4-series/
• https://www.caranddriver.com/bmw/4-series
• https://www.motortrend.com/cars/bmw/4-series/
• https://www.consumerreports.org/cars/bmw/4-series/

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