90° O2 Oxygen Sensor Spacer Bung Mini Catalytic Converter Mini Cat M18 X 1.5
Specifics:
Condition: 100% Brand New
Material: Nickel Plated Steel
Color: Please refer to the picture
Type: Oxygen Sensor Spacer
Fitment Type: Direct Replacement
Thread: M18 X 1.5
Size: As shown in the picture
(Please allow 1-3 mm measuring deviation due to manual measurement.)
Fitment:
Universal All models with M18 X 1.5 Oxygen sensor
90° Spacers, One Clean Fix for Persistent Catalyst Codes
If your exhaust is tucked into a tight spot and a straight O2 sensor spacer just won’t clear the frame, subframe, or heat shield, this 90° angled version solves that problem while still doing the real job: correcting a downstream oxygen sensor reading that’s tripping P0420, P0430, or P0042.
This 2-pack is built for dual-exhaust setups — V6 and V8 engines with a bank on each side. Each spacer threads onto your existing rear O2 sensor, then bolts back into the bung at a 90° angle, routing around whatever’s in the way without any cutting, welding, or rewiring.
Why the Angle Matters
Not every exhaust has room for a straight spacer. The 90° bend lets you tuck the sensor housing out of tight quarters — common on lowered vehicles, off-road builds, or cars where the O2 bung sits close to a crossmember. If you’re not sure which angle your car needs, a quick look under the vehicle (or a call to your mechanic) will tell you fast: plenty of clearance means straight works fine, tight quarters mean you’ll want the 45° or 90°.
Built-In Mini Catalytic Converter
Each spacer houses a small catalytic core coated with precious metals — palladium, platinum, and rhodium — the same catalysts used in full-size converters. As exhaust gas passes through, it’s converted into cleaner byproducts, which gives the O2 sensor a reading close enough to a functioning catalytic converter that the ECU stops throwing the fault code.
Universal M18 x 1.5mm Fit
Fits the standard O2 sensor thread used across the vast majority of gas-powered vehicles — Toyota, Honda, Ford, Chevy, BMW, Subaru, VW, and more. Works on inline and V-configuration engines from small displacement up to large V8s.
Specifications
| Spec | Detail |
|---|---|
| Angle | 90° |
| Thread | M18 x 1.5mm |
| Material | Stainless steel |
| Package | 1 | 2 | 3 | 4 pieces |
| Placement | Rear (downstream) O2 sensor only |
Installation
- Jack up the vehicle if needed and locate the O2 sensor bung.
- Remove the existing rear O2 sensor.
- Thread the sensor into the spacer, then reinstall the assembly into the bung by hand.
- Snug with a wrench — stop if you feel heavy resistance, don’t force it.
Takes most people under 15 minutes per side with basic hand tools.
Install Notes
- These go on the rear (downstream) O2 sensor only — installing on the front sensor won’t resolve the code.
- Dual exhaust and V6/V8 engines need one spacer per bank, which is why this comes as a 2-pack.
- Confirm your O2 sensor itself is functioning properly first — this addresses a catalyst-efficiency code, not a failed sensor.
Applicable Codes: P0420, P0421, P0422, P0423, P0424, P0430, P0431, P0432, P0433, P0434, P0042
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