97-98 BMW 528i/540i Front Left/Right Sensor
97-98 BMW 528i/540i Front Left/Right Sensor
OEM replacement oxygen sensors for your BMW's fuel management and emissions system. These direct-fit units restore proper air-fuel ratio readings and engine performance. Built to factory specifications for reliable operation in high-heat engine bay conditions.
Key Features
- Front position sensors - Critical for catalytic converter efficiency and fuel trim control
- Direct OEM fit - No modification or adapter required; mounts at factory sensor bungs
- Left and right pair - Covers both sensors for complete bank coverage
Specs
- Configuration: Pair (left and right)
- Condition: New
Whats Included
- Left oxygen sensor
- Right oxygen sensor
Frequently Asked Questions
Do I need any special tools or adapters to install these?
These mount directly at the factory sensor bungs with no adapters needed. You'll want an oxygen sensor socket (a cheap, standard tool) and basic hand tools. Disconnect the battery before you start and let the exhaust cool completely—sensor bungs sit in hot territory.
Will these trigger a check engine light?
Not if they're installed correctly and functioning properly. If your light was on before install due to a bad sensor, it should clear once the new sensors complete their readiness cycle—typically after 50–100 miles of normal driving.
Can I install just one sensor, or do I need both?
You can replace one at a time if needed, but both sensors work together to balance fuel trim across both banks. Replacing the pair ensures consistent engine performance and prevents uneven air-fuel ratios between cylinders.
Products received may vary slightly from images due to manufacturing tolerances or supply chain variables.
International Orders (Outside USA)
Please be aware your country may charge import fees of up to 20% in some cases. If delivery is refused, return shipping costs us 4x the original shipping fee, so we will charge a 50% restocking fee. By purchasing you agree to these terms.
Terms of Service:
By clicking purchase, you confirm you have read and agree to the TOS and Shipping & Return policies which are published at the bottom of SLRspeed.com
The Premium Suspension Company
Trusted by top racing and drifting teams worldwide.
