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BMW B46/B48 engine repair costs

We have real owner-reported prices for 4 B46/B48 repairs. Among those with at least two dealer or independent prices for this engine, the highest median is Water Pump Replacement at $2,470 and the lowest is Oil Change at $125.

Specs and history from Wikipedia (revisions listed below) · every price links to its source on the repair page

B46/B48 at a glance

Production	2014–present	[1]
Configuration	Inline-four	[1]
Displacement	1597 cc (97.5 cu in) / 1998 cc (121.9 cu in)	[1]
Fuel type	Petrol	[1]
Forced induction	Single twin-scroll with air-to-liquid intercooler	[1]
Valvetrain	DOHC, with VVT & VVL	[1]
Timing drive	Chain	[1]
Block	Aluminium	[1]
Cylinder head	Aluminium	[1]
Fuel system	Direct injection	[2]

Cars with the B46/B48

330i, 430i, 230i and 530i, plus the X3 and X4 xDrive30i, per our turbo coolant line data. This line only lists cars our own repair data names for this engine.

Cars and chassis codes named in Wikipedia's article on this engine. It can include related or successor models, so treat it as a lead and check your exact car. Open a linked model to see its repair costs.

Show 33 more

Model pages for the B46/B48

Chassis pages whose cars, per Wikipedia, used this engine.

F20 1 Series F40 1 Series F70 1 Series F22 2 Series F23 2 Series G42 2 Series F45 2 Series U06 2 Series F44 2 Series F74 2 Series F30 3 Series F31 3 Series F34 3 Series G20 3 Series G21 3 Series F32 4 Series F33 4 Series F36 4 Series G22 4 Series G23 4 Series G26 4 Series G30 5 Series G31 5 Series G32 6 Series G11 7 Series F48 X1 U11 X1 F39 X2 U10 X2 G01 X3 G45 X3 G02 X4 G29 Z4

Repairs we have prices for

Sorted by number of reported prices. "B46/B48 only" rows use only prices that name this engine. "Whole job" rows use every price on that repair page, which also covers other engines, so read them as a general guide.

Repair	Scope	Dealer	Independent	DIY	Prices
B58 / B48 Oil Filter Housing (Coolant Leak)	Whole job	$2,300–$4,360	$1,500–$3,800	$460	15
Oil Change	B46/B48 only	$125–$175	$100	—	3
B46/B48 Turbo Coolant Return Line	B46/B48 only	$801	—	$77–$107	3
Water Pump Replacement	B46/B48 only	$1,339	$3,600	—	2

Most expensive B46/B48 repairs in our data

Ranked by the median of dealer and independent prices for B46/B48 cars, for repairs with at least two such prices. Scope differs between reports, so open the page before comparing.

Water Pump Replacement: median $2,470, range $1,339–$3,600 (2 prices)
Oil Change: median $125, range $100–$175 (3 prices)

Cheapest B46/B48 repairs in our data

Oil Change: median $125, range $100–$175 (3 prices)
Water Pump Replacement: median $2,470, range $1,339–$3,600 (2 prices)

Models these repairs appear on

F30 F32 F10 G01 G20 G30 G05 G22 F48 F31 F22

Before and after

Predecessor: BMW N20

Related engines

BMW N13 (2011–2015)
BMW B47 (2014–present)
BMW S55 (2014–2021)
BMW B38 (2013–present)
BMW B57 (2015–present)

Related guides

Common questions

What are the most common BMW B46/B48 repairs?

The B46/B48 repairs owners have reported prices for are: Water Pump Replacement, B58 / B48 Oil Filter Housing (Coolant Leak), Oil Change, B46/B48 Turbo Coolant Return Line. These are repairs we have real prices for, not a measured failure rate.

What is the most expensive B46/B48 repair?

Among B46/B48 repairs with at least two dealer or independent prices, Water Pump Replacement has the highest median, at $2,470 ($1,339–$3,600, 2 prices).

What is the cheapest B46/B48 repair?

Among B46/B48 repairs with at least two dealer or independent prices, Oil Change has the lowest median, at $125 ($100–$175, 3 prices).

Which BMWs have the B46/B48 engine?

330i, 430i, 230i and 530i, plus the X3 and X4 xDrive30i, per our turbo coolant line data.

When was the BMW B46/B48 engine produced?

2014–present, per Wikipedia.

Sources

Wikipedia: BMW B48 (revision 1347740922, read 2026-10-23)
Wikipedia: List of BMW engines