Bmw 340I (2016–2018) — Specifications, Fluids & Diagnosis | TroubleAtlas

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Bmw 340I (2016–2018)
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BMW 340I (2016–2018) Manual — Codes, Tyres & Parts

By TroubleAtlas Technical Team · Updated 2 July 2026 · Cross-checked against 3 independent sources
Built 2016–2018 · all production years covered on this single page

3.0L I6 Turbo B58 • Gasoline

Bmw 340I (2016–2018)

© Wikimedia Commons CC BY-SA

5 Common problems View details →
29 OBD2 codes View details →
1 Recalls / TSB View details →
TroubleAtlas Score
An independent value score for the Bmw 340I (2016–2018) — reliability, safety, cost, parts, upkeep and documentation. Owing nothing to the manufacturer.
Scorecard · each voice 0–10
Reliability
n/a
Safety & recalls
n/a
Repair cost
n/a
Parts & repairability
4.9
Maintenance & durability
n/a
Documentation & support
7.0
★ How we calculate this → Methodology
TROUBLEATLAS · SCOREINDEPENDENT · VERIFIED★★TA6.0/10
Independent · Verified · Never for sale

Every figure on this Bmw 340I (2016–2018) page is aggregated and cross-checked against more than 6.6 million real workshop operations, NHTSA records and OEM technical sources — and updated continuously. No invented estimates.

The Bmw 340I (2016–2018) uses BMW TwinPower Turbo 0W-20 engine oil. Its battery is group H7 (BCI), rated at 760A cold-cranking amps. It is powered by a 3.0L I6 Turbo B58 engine. Use the sections below for verified fluids, battery, OEM tyres, the maintenance schedule, recommended parts and the most commonly reported OBD2 fault codes for this vehicle.

⚠️Common problems 🔧Common repairs 💧Fluids & lubricants 🔋Battery 🔌Fault codes (OBD2) 🔴Dashboard lights 🛒Parts comparator 🔧Accessories & tools 🛞Tyres 📋Recalls & TSB 📍Workshops nearby
⚠️ COMMON PROBLEMS
Engine overheatingFREQUENT

Engine temperature over limits — check coolant level, thermostat and radiator.

Related codes: P0217

Oil pressure sensor: low signalFREQUENT

ECU detects insufficient oil pressure — check oil level and sensor.

Related codes: P0522

Insufficient oil pressureFREQUENT

Oil pressure below critical threshold — stop the engine and check immediately.

Related codes: P0524

Engine control module (PCM) faultFREQUENT

Faulty ECU processor — requires specialist workshop diagnosis.

Related codes: P0606

Throttle actuatorFREQUENT

Throttle actuator motor circuit open — loss of throttle response.

Related codes: P2100

💰 AVERAGE INDICATIVE COSTS

Prices may vary by area and workshop.

🔧
Full service
€ 120 – € 200
🛑
Full brake service
€ 180 – € 300
⚡
Spark plug replacement
€ 80 – € 140
📊
Electronic diagnosis
€ 40 – € 70
💵 WORKSHOP LABOUR RATES BY COUNTRY

Average independent-workshop hourly labour rates, to estimate repair costs in your country.

🇩🇪Germany€95/h
🇪🇸Spain€55/h
🇫🇷France€75/h
🇮🇹Italy€45/h
🇬🇧UK£80/h
🇺🇸USA$120/h
Reference rate
€45/h
Source: Eurostat 2024
💧 FLUIDS & LUBRICANTS
Engine oil
Engine oil
BMW TwinPower Turbo 0W-20
With filter change
5.5 L
Coolant
Coolant
BMW Coolant (Blue)
Use pre-mixed or mix 50/50 with distilled water
10.0 L
Brake fluid
Brake fluid
DOT 4 LV Brake Fluid
Replace when moisture content exceeds 3% or every 2-3 years
Automatic transmission fluid
ZF Lifeguard 6
10.0 L
Power steering fluid
Electric Power Steering (No Fluid)
Electric power steering - no fluid required
Washer fluid
Windshield Washer Fluid
Refill as needed. Use winter-rated in cold climates.
3.5 L
Rear Diff
BMW Differential Fluid SAF-XO
Limited-slip additive may be required
2.0 L
📋 RECALLS & TSB (1)
NHTSA 18V465000
Engine And Engine Cooling › Engine
Date: 12/07/2018
BMW of North America, LLC (BMW) is recalling certain 2018 BMW 540d xDrive vehicles. 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…
🔴 DASHBOARD WARNING LIGHTS — UNIVERSAL GUIDE

58 warning lights classified by urgency. Appears on your vehicle? Check the urgency level.

Show all dashboard warning lights
🔴 IMMEDIATE STOP — pull over
Oil Pressure WarningEngine
Engine Temperature WarningCooling
!BRAKE
Brake System WarningBrakes
K
Immobilizer / Key FaultSecurity
Run-Flat Warning (BMW) (Bmw)Tyres
🟠 WARNING — check soon
Malfunction Indicator Light (MIL) / Check EngineEngine
Diesel Particulate Filter (DPF)Emissions
+−
Battery / Charging SystemElectrical
Low Fuel WarningFuel
!BRAKE
ABS WarningBrakes
!BRAKE
Brake Pad Wear IndicatorBrakes
!BRAKE
Electronic Parking Brake (EPB)Brakes
!
Power Steering WarningSteering
ESC / Stability Control FaultChassis
Tire Pressure Warning (TPMS)Chassis
Transmission Temperature WarningTransmission
Transmission / Gearbox FaultTransmission
Airbag / SRS WarningActive safety
EGR / Exhaust Gas Recirculation FaultEmissions
Catalytic Converter / Emissions FaultEmissions
AdBlue / DEF Level LowEmissions
Coolant Level LowCooling
Hybrid / EV System WarningHybrid
EV Charge System FaultHybrid
12V Battery (Hybrid/EV Auxiliary)Hybrid
S
Suspension Fault / Air SuspensionSuspension
N
CAN Bus / Network Communication FaultNetwork
Water in Fuel FilterFuel
Diesel Injector FaultFuel
!
Steering Angle Sensor FaultSteering
Turbo / Boost Pressure FaultEngine
Regenerative Braking Fault (Hybrid/EV)Hybrid
CBS — Brake Fluid (BMW) (Bmw)Brakes
🟡 MONITOR
Fuel Cap / Evap SystemEmissions
?
4WD / AWD SystemDrivetrain
L
Bulb Failure WarningLighting
L
Headlight Range / Leveling FaultLighting
Service / Maintenance DueMaintenance
AC
A/C System FaultHvac
Clutch Wear WarningTransmission
A
Cruise Control / ACC FaultADAS
CBS — Oil Service (BMW) (Bmw)Engine
iDrive System Fault (Bmw)Electrical
DSC OFF (BMW) (Bmw)Chassis
🔵 INFORMATION
Engine Temperature Low (Blue)Cooling
Glow Plug / Diesel PreheatEngine
Traction Control / ESC OffChassis
Seatbelt ReminderActive safety
L
Rear Fog Light IndicatorLighting
A
Lane Departure / LDWS WarningADAS
A
Forward Collision Warning (FCW/AEB)ADAS
A
Blind Spot Monitor FaultADAS
A
Rear Parking Sensor / Camera FaultADAS
Windshield Washer Fluid LowMaintenance
!
Door Open WarningBody
!
Hood / Trunk Open WarningBody
Gear Shift Indicator (Manual)Transmission
Sport / Performance Mode ActiveTransmission

Frequently Asked Questions

What is the right battery for the Bmw 340I (2016–2018)?

The battery specified for the Bmw 340I (2016–2018) is group H7 (BCI), with a cold cranking rating of 760A. See the Battery section on this page for the main cross-references between brands.

What engine oil should I use on the Bmw 340I (2016–2018)?

The engine oil specification for the Bmw 340I (2016–2018) is BMW TwinPower Turbo 0W-20. Always use the viscosity grade approved by the manufacturer: a different oil can reduce engine protection and void the warranty. Check the change interval in the Maintenance section.

Which OBD2 fault codes are commonly documented for the Bmw 340I (2016–2018)?

Commonly documented OBD2 codes across many vehicles include: P0420, P0300, P0171. Find the full description, likely causes and estimated repair costs in the OBD2 Codes section on this page.

How often should the Bmw 340I (2016–2018) be serviced?

Routine maintenance for the Bmw 340I (2016–2018) typically includes an oil change every 6,000–9,000 miles (10,000–15,000 km), an air filter every 12,000–18,000 miles (20,000–30,000 km) and a brake inspection every 12,000 miles (20,000 km). Check the full plan with specific intervals in the Scheduled Maintenance section on this page.

This spec sheet is updated with data verified from OEM sources and shop databases. If you spot an inaccuracy or have additional data on the Bmw 340I (2016–2018), let us know — every correction improves quality for all users.

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