Air and Fuel Oxygen Sensors, Controllers and Components

Bosch

WHEEL

$970.88

SKU: B00G 44821

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

This sensor measures oxygen in automotive exhaust (gasoline or Diesel). The LSU 4.9 is a planar ZrO2 dual cell limiting current sensor with integrated heater. Its monotonic output (lambda 0.65 to air) allows universal use for lambda 1 and other ranges. A trimming resistor in the connector module defines its characteristic. Benefits include robust design and high Bosch production quality. Requires a special LSU-IC, found in most Bosch Motorsport ECUs and lambda control units (e.g., LT4). Replaces discontinued 0 258 017 052 sensor.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandBosch
Part NumberB00G 44821

Videos

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy