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Description
Isotatic-pressed and plasma-sprayed for extended service life Double-Layered 310S Stainless Steel: Additional protection from moisture and debris Restored Engine Performance: Improved fuel economy and lower emissions Oxygen sensors wear out over time and should be replaced every 60,000 miles to prevent poor engine performance. TRQ recommends replacing the oxygen sensors in sets to optimize fuel economy and reduce overall emissions. All products are fit and road-tested in our Massachusetts R&D facility to ensure we deliver on our promise of Trusted Reliable Quality. Reference NumbersACDelco: 12643708, 12655678, 12657188, 12659516, 12661898, 12666612DENSO: 234-4762, 234-4940, 234-4974Walker Products: 250-241132, 250-241162 TRQ products are covered by a 2-year / 24,000-mile warranty.