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O2 / Oxygen Sensor Replacement cost

O2 / Oxygen Sensor Replacement on a BMW with the N54/N55 engine typically costs $200 at an independent shop, $1,100 at a BMW dealer, or $90–$170 in parts DIY, based on 4 real owner-reported prices.

Last updated October 16, 2026 · Sources: 4 owner-reported prices from 1 cited thread

Upstream (pre-cat) or downstream O2 sensor on BMW turbo engines. Real prices reported by owners on Reddit and BMW forums, with a link to every one.

N54N55E82 E90 E92 F30 F10

Limited data: One dealer quote and indy labor figures from one thread.

Typical cost

BMW dealer

$1,100

Median $1,100 · 1 data point

Independent shop

$200

Median $200 · 1 data point

DIY (parts/tools)

$90 – $170

Median $130 · 2 data points

Ranges are the lowest and highest prices in the table below. They are not estimates. Shop prices include parts and labor unless noted.

Every price we found

Price	Where	Details	Source
$1,100	Dealer	Dealer quote, bank 1 O2 sensor, 2009 135i (7 hrs labor)	[1]
$200	Indy	Two local shops quoted $200 labor (owner supplies the part)	[1]
$90	DIY	Bosch sensor bought on Amazon	[1]
$170	DIY	Bosch sensor price owner found	[1]

Use a Bosch (OE supplier) sensor, not a generic one, per forum advice.
Confirm which sensor (bank/position) the code points to before replacing.

How long it takes

One indy charged an hour of labor; another quoted $200 labor. A DIYer moved the steering rack a few inches to reach a pre-cat sensor on a 135i.

Which cars are affected

135i (E82), 335i (E9x), N55 F30/F10 and similar. Pre-cat sensors on the turbo sixes sit up near the turbos; post-cat sensors are easier.

Symptoms

Check engine light with O2 / lambda sensor codes
Erratic idle
Poor fuel economy

Parts list

Bosch O2 sensor (pre-cat)	ECS Tuning Pelican Parts Amazon
22mm O2 sensor socket / crowfoot	ECS Tuning Pelican Parts Amazon

Check fitment for your exact car (VIN) before ordering. Links may become affiliate links in the future.

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Common questions

How much does O2 / Oxygen Sensor Replacement cost?

O2 / Oxygen Sensor Replacement on a BMW with the N54/N55 engine typically costs $200 at an independent shop, $1,100 at a BMW dealer, or $90–$170 in parts DIY, based on 4 real owner-reported prices.

How much does O2 / Oxygen Sensor Replacement cost at a BMW dealer?

Real dealer prices we found ranged $1,100 (1 data point, median $1,100).

How much does an independent shop charge for O2 / Oxygen Sensor Replacement?

Independent shop prices ranged $200 (1 data points, median $200).

Can I do O2 / Oxygen Sensor Replacement myself?

Owners who did it themselves reported $90 to $170 in parts and tools.

How long does O2 / Oxygen Sensor Replacement take?

One indy charged an hour of labor; another quoted $200 labor. A DIYer moved the steering rack a few inches to reach a pre-cat sensor on a 135i.

Which BMWs are affected?

135i (E82), 335i (E9x), N55 F30/F10 and similar. Pre-cat sensors on the turbo sixes sit up near the turbos; post-cat sensors are easier.