2018 BMW 340I: Recalls, Problems & MPG
Here are the deets on the 2018 BMW 340I: 1 recall, 3 owner complaints and up to 25 mpg combined.
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Recalls
1 vehicle recall from the manufacturer. Repairs are free. Check your VIN to see if one is still open on your car.
Engine & cooling Vehicle recall #18V465000 · 2018 · 5,309 vehicles
What's wrong: The crankshaft sensor May be equipped with incorrect firmware, preventing the sensor from properly processing input from the crankshaft reluctor ring, possibly resulting in a vehicle stall. On September 12, 2018, BMW expanded the recall to a total of 5,309 vehicles including certain 2018-2019 BMW 540d xdrive, 230i m240i, m240i xdrive, x2 sdrive28i, x2 xdrive28i, x1 sdrive28i, x1 xdrive28i, 330i, 330i xdrive, 340i,…
Why it matters: A vehicle stall can increase the risk of a crash.
The fix: Bmw will notify owners, and dealers will replace the crankshaft sensor, free of charge. The recall began September 6, 2018.
Most-reported problems
Owner complaints filed with NHTSA, by component. One complaint can list several components. 1 mention a fire, 0 injuries and 0 deaths were reported.
What owners describe
- Engine (2): no single recurring theme in the descriptions.
- Fuel & propulsion (1): no single recurring theme in the descriptions.
The 2018 BMW 340I has 3 owner complaints, ranking #3 of 6 340I model years for complaints (about average; the typical year has 3). Neighboring years: 2017 (5 complaints, 0 recalls).
Engines & fuel economy (EPA)
| Engine | Transmission | Drive | City | Hwy | Comb. | Fuel |
|---|---|---|---|---|---|---|
| 3.0 L 6-cyl turbo | Automatic (S8) | Rear-Wheel Drive | 21 | 32 | 25 | Premium |
| 3.0 L 6-cyl turbo | Manual 6-spd | Rear-Wheel Drive | 19 | 29 | 23 | Premium |
Want the full repair deets? Get the factory manual.
Recall and complaint data tells you what goes wrong. A service manual tells you how to fix it: torque specs, wiring diagrams, fluid capacities and step-by-step procedures for the 2018 BMW 340I.
Closest thing to the factory manual for most years. Pay once, keep it.
Most $25–$78, one-timePro-shop repair procedures, wiring diagrams and TSBs for your exact car.
From $19.99/mo · $39.99/yrOEM procedures, specs and recall/TSB info, the same source many shops use.
From $19.99/mo · $59.99/yrStep-by-step photos written from a real teardown. Great for first-timers.
Books ~$30–$40 · AllAccess $34.99/moHeads up: we may earn a commission if you buy through these links, at no extra cost to you. Prices checked 2026-10 and can change. We never host or link to pirated manuals. Disclosure
FAQ
Does the 2018 BMW 340I have any recalls?
Yes. NHTSA lists 1 vehicle recall for the 2018 BMW 340I. Recall repairs are free at any dealer, no matter how old the car is. Check your VIN at nhtsa.gov/recalls.
What are the most common 2018 BMW 340I problems?
Owners have filed 3 complaints with NHTSA. The most-reported areas are engine (2), fuel & propulsion (1).
What gas mileage does the 2018 BMW 340I get?
EPA ratings run up to 25 mpg combined (3.0 L, Automatic (S8)), across 2 engine and transmission combos.
Where can I get a 2018 BMW 340I repair manual?
eManualOnline sells downloadable manuals, Mitchell 1 DIY and ALLDATAdiy sell online access to factory repair data, and Haynes sells printed guides and online access. Pick a download if you want to keep it, or a subscription for wiring diagrams and TSBs.