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WalkerPart #: 16871
Walker 16871 Catalytic Converter - Rear
⚙️ 6 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$578.71Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
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✅ In Stock · Ready To Ship
Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
📦EPA, Rear
🚗Fitment: Buick, LaCrosse
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
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Walker 16871 Catalytic Converter - Rear
| Brand | Walker |
| Part Number | 16871 |
| Position | EPA, Rear |
| Body Shape | Round |
| Body Height | 4.00 |
| Body Length | 4.00 |
| Body Width | 4.00 |
| Inlet Quantity | 1 |
| Body Material | Stainless steel |
| Outlet Quantity | 1 |
| California Air Resources Board (CARB) Certified | No |
| Overall Length | 15.35 |
| Converter Quantity | 1 |
| Inlet 1 Type | 4-bolt welded flange |
| Mounting Hardware Included | Gasket only |
| Outlet 1 Type | 2-bolt welded flange |
| Oxygen Sensor Location | Pre-catalyst |
| Substrate Material | Ceramic |
| Universal Or Specific Fit | Direct fit |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Drive Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2016 | Buick | LaCrosse | AWD | 3.6L | V6 | Rear | Fire Wall Side; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Additional Part(s) Needed To Complete Installation: 31337; Ultra Direct Fit Type; EPA |
| 2015 | Buick | LaCrosse | AWD | 3.6L | V6 | Rear | Fire Wall Side; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Additional Part(s) Needed To Complete Installation: 31337; Ultra Direct Fit Type; EPA |
| 2014 | Buick | LaCrosse | AWD | 3.6L | V6 | Rear | Fire Wall Side; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Additional Part(s) Needed To Complete Installation: 31337; Ultra Direct Fit Type; EPA |
| 2013 | Buick | LaCrosse | AWD | 3.6L | V6 | Rear | Fire Wall Side; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Additional Part(s) Needed To Complete Installation: 31337; Ultra Direct Fit Type; EPA |
| 2012 | Buick | LaCrosse | AWD | 3.6L | V6 | Rear | Fire Wall Side; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Additional Part(s) Needed To Complete Installation: 31337; Ultra Direct Fit Type; EPA |
| 2010 | Buick | LaCrosse | 3.0L | V6 | Rear | Fire Wall Side; Fits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Additional Part(s) Needed To Complete Installation: 31337; Ultra Direct Fit Type; EPA |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
20907414
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.