Free shipping over $99 / 12-month warranty / 60-day returns / Same-day dispatch before 14:00 ET
Caterpillar

NOx Sensor 5WK96723 Lamb for Caterpillar CAT 359-9173 3599173 5WK9 6723A

SKU: 5324221652329| 12-month warranty | Free shipping $99+
$ 250

Tax calculated at checkout · USD · Free 60-day returns

In stock — ships today before 14:00 ET
Part numbersCross-reference
  • 5324221652329
  • 5WK9 6723A
  • 3599173

Match the number printed on your old part or in the vehicle service manual — not the part name.

Free $99+US & EU
12-month warrantyReplacement or refund
60-day returnsNo return form
More in Caterpillar

What this part is

359-9173  3599173  5WK9 6723

NOX Sensor 5WK96723 Lamb for Caterpillar CAT 359-9173 3599173 5WK9 6723A. Professional-grade nox sensor from SHR Autoparts. IATF16949 certified manufacturer, 10+ years experience, serving distributors in 50+ countries.

Key Features

  • Aftermarket cross-reference quality, IATF16949 certified
  • Direct bolt-on replacement, no modifications needed
  • 100% functionally tested before shipping
  • 12-month warranty with technical support
  • Compatible with Euro 5/6 SCR emissions systems

OEM Part Numbers

  • 5WK96723
  • 5WK9 6723A
  • 6723A1
  • 6723A2
  • 6723A3
  • 6723A4

Vehicle Compatibility

MakeTypical Models
MANMultiple models
CaterpillarExcavators, Loaders

Specifications

Product TypeNOx Sensor
ConditionNew
Warranty12 months
CertificationIATF16949, ISO 9001

SKU: 5324221652329

Need bulk pricing? Request a Quote for volume discounts and OEM customization.

Technical specifications

ISO 9001SKU5324221652329Need bulk pricing

Identification

SKU5324221652329
Part number5WK96723
Part number5WK9 6723A
Part number3599173
CategoryCaterpillar

Verified fitment

Send us your VIN and we will confirm fitment within 4 business hours.

12-month parts warranty

Every part ships with a 12-month warranty from the date of delivery. If the part fails under normal use within that window, we replace it or refund the purchase price — your choice.

What we cover

  • Manufacturing defects — no questions asked.
  • Early failure within the warranty period.
  • Replacement shipping both ways, on us.

What we do not cover

  • Damage from incorrect installation.
  • Parts modified, disassembled, or used in racing.
  • Cosmetic wear or normal ageing.
Read the full warranty

Shipping rates

DestinationCarrierDeliveryCost
United States (cont.)UPS / USPS2–4 biz daysFree $99+ · $6.90
European UnionDHL / DPD3–6 biz daysFree $99+ · €8.90
UK / SwitzerlandDHL3–5 biz daysFree $99+ · £8.00
Rest of worldDHL Express5–10 biz daysCalculated at checkout

Returns

60-day no-fuss returns. Order a return label from your account, drop the part at any carrier drop-off, and we refund within 5 business days of receiving it. Wrong-fit returns are always free.

Returns policy
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