B38A15

1 Series·F20·2015–2019

"B38 is the same family as B48 and B58 — very quiet, undemanding and economical."

SOLID

63/ 100

"Capable small turbo, watch the EGR"

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Max HP

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Torque Nm

10,000

Oil interval km

Recalls

Known issues

Known Issues

EGR Cooler Failure & Recall€400-900 · 60,000-150,000 kmHIGH

The EGR cooler is subject to a DVSA recall affecting BMW and MINI vehicles. Coolant can leak internally or externally from the EGR cooler, posing a risk of coolant loss and potential engine damage. New EGR coolers are to be fitted to affected vehicles.

Coolant loss with no visible external leak

White smoke from exhaust

Overheating warning

Rough idle

DIY: Hard

Turbo Coolant Line Leaks€300-700 · 80,000-160,000 kmHIGH

Coolant lines feeding the turbocharger are known to develop leaks, causing rapid coolant loss. Left unaddressed this can lead to turbo overheating and engine damage.

Visible coolant loss

Low coolant warning light

Smell of coolant after driving

Steam from engine bay

DIY: Moderate

Turbo Wastegate / Actuator Issues€400-1,200 · 80,000-150,000 kmMODERATE

Wastegate actuator failures have been reported, triggering check engine lights and fault codes. This can result in reduced boost, noticeable turbo lag, and limp mode.

Check engine light

Noticeable increase in turbo lag

Reduced power

Limp mode activation

DIY: Moderate

Intercooler Sourcing Complications (LCI Specific)€150-400 · 0-200,000 kmLOW

Owners have reported difficulty sourcing correct aftermarket or performance intercoolers for the F20 LCI variant due to fitment differences versus pre-LCI models. This affects both repair and upgrade scenarios.

Incorrect parts supplied

Heat soak under sustained performance driving

DIY: Moderate

Buying Checklist

Run VIN through BMW recall checker to confirm EGR cooler recall has been completed

Pressure test the entire cooling system to identify any turbo coolant line or EGR cooler leaks

Connect OBD-II scanner and check for stored or pending fault codes, especially boost and EGR related

Inspect turbo coolant feed and return lines by hand for cracking, weeping or heat damage

Verify oil service history — insist on stamps or invoices showing intervals no longer than 10,000 km

Test drive with sustained acceleration to confirm no limp mode, unusual turbo lag, or hesitation under boost

Service Reality

Community oil interval10,000 km

Oil specificationBMW Longlife-04, 5W-30 fully synthetic

Est. ownership cost (2yr)€600-1,800 per year depending on age, mileage and recall status

Real mix fuel consumptionNo data

Also Found In

BMW 118i (F20/F21)BMW 216i (F45/F46)BMW 316i (F30)MINI Cooper (F56)MINI Clubman (F54)Toyota GR Sport (hybrid variant — B38H)

Buying Advice

The BMW B38A15 is a competent modern three-cylinder turbo that shares DNA with BMW's more powerful B48 and B58 units, giving it a reasonably sound engineering foundation. Its most important pre-purchase check is confirming the DVSA EGR cooler recall has been completed, as unresolved units risk coolant loss and engine damage. Turbo coolant line integrity and wastegate actuator health should also be verified before purchase, as both are wear items that escalate in cost if ignored. Used examples with full service history and confirmed recall completion represent fair value, but walk away from any car showing coolant loss or unexplained check engine lights.