Inexpensive IAT thermistors
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From: East Central Florida
Inexpensive IAT thermistors Digi-Key P/N 495-2145-ND is a similar appearing thermistor that
sells for $2.45. It is within 5% of GM table across the range.
I just ordered a few for IAT relocation (since I lost my old
original factory one, been running w/ a 85mm MAF for years).
Omega 44005 is another option but it's > $20. I don't even
want to know what GM charges for a factory one. And I don't
need the extra plastic.
EPCOS Thermistor
B57861S0302F040
R/T No. 8016
T (°C) B25/100 = 3988 K, R25 = 3000 W, TR = 25 °C, DRR/RR = ± 1%
Rnom[W] Rmin[W] Rmax[W] DRR/RR[±%] DT[±°C] a (%/K)
-55.0 288910 271710 306120 6.0 0.8 7.4
-50.0 201030 189880 212180 5.5 0.8 7.1
-45.0 141510 134210 148800 5.2 0.7 6.9
-40.0 100950 96126 105770 4.8 0.7 6.7
-35.0 72777 69560 75993 4.4 0.7 6.4
-30.0 53100 50936 55264 4.1 0.7 6.2
-25.0 39111 37646 40576 3.7 0.6 6.0
-20.0 29121 28123 30119 3.4 0.6 5.8
-15.0 21879 21196 22562 3.1 0.6 5.6
-10.0 16599 16129 17069 2.8 0.5 5.4
-5.0 12695 12371 13018 2.5 0.5 5.3
0.0 9795 9572 10018 2.3 0.4 5.1
5.0 7616 7463 7769 2.0 0.4 5.0
10.0 5970 5865 6075 1.8 0.4 4.8
15.0 4712 4641 4784 1.5 0.3 4.7
20.0 3747 3699 3795 1.3 0.3 4.5
25.0 3000 2970 3030 1.0 0.2 4.4
30.0 2417 2386 2448 1.3 0.3 4.3
35.0 1959 1930 1988 1.5 0.4 4.1
40.0 1598 1571 1625 1.7 0.4 4.0
45.0 1311 1286 1335 1.9 0.5 3.9
50.0 1081 1058 1103 2.1 0.5 3.8
55.0 895.9 875.5 916.2 2.3 0.6 3.7
60.0 746.4 728.1 764.7 2.5 0.7 3.6
65.0 624.9 608.5 641.4 2.6 0.8 3.5
70.0 525.6 510.9 540.3 2.8 0.8 3.4
75.0 444.4 431.2 457.6 3.0 0.9 3.3
80.0 377.4 365.6 389.2 3.1 1.0 3.2
85.0 321.7 311.1 332.3 3.3 1.0 3.2
90.0 275.3 265.8 284.8 3.4 1.1 3.1
95.0 236.6 228.1 245.1 3.6 1.2 3.0
100.0 204.0 196.4 211.6 3.7 1.3 2.9
105.0 176.6 169.7 183.4 3.9 1.4 2.9
110.0 153.4 147.2 159.5 4.0 1.4 2.8
115.0 133.6 128.1 139.2 4.2 1.5 2.7
120.0 116.8 111.8 121.8 4.3 1.6 2.7
125.0 102.5 97.99 107.0 4.4 1.7 2.6
130.0 90.27 86.18 94.36 4.5 1.8 2.5
135.0 79.63 75.93 83.34 4.7 1.9 2.5
140.0 70.44 67.08 73.80 4.8 2.0 2.4
145.0 62.50 59.44 65.55 4.9 2.1 2.4
150.0 55.59 52.81 58.37 5.0 2.2 2.3
155.0 49.60 47.07 52.14 5.1 2.3 2.3
sells for $2.45. It is within 5% of GM table across the range.
I just ordered a few for IAT relocation (since I lost my old
original factory one, been running w/ a 85mm MAF for years).
Omega 44005 is another option but it's > $20. I don't even
want to know what GM charges for a factory one. And I don't
need the extra plastic.
EPCOS Thermistor
B57861S0302F040
R/T No. 8016
T (°C) B25/100 = 3988 K, R25 = 3000 W, TR = 25 °C, DRR/RR = ± 1%
Rnom[W] Rmin[W] Rmax[W] DRR/RR[±%] DT[±°C] a (%/K)
-55.0 288910 271710 306120 6.0 0.8 7.4
-50.0 201030 189880 212180 5.5 0.8 7.1
-45.0 141510 134210 148800 5.2 0.7 6.9
-40.0 100950 96126 105770 4.8 0.7 6.7
-35.0 72777 69560 75993 4.4 0.7 6.4
-30.0 53100 50936 55264 4.1 0.7 6.2
-25.0 39111 37646 40576 3.7 0.6 6.0
-20.0 29121 28123 30119 3.4 0.6 5.8
-15.0 21879 21196 22562 3.1 0.6 5.6
-10.0 16599 16129 17069 2.8 0.5 5.4
-5.0 12695 12371 13018 2.5 0.5 5.3
0.0 9795 9572 10018 2.3 0.4 5.1
5.0 7616 7463 7769 2.0 0.4 5.0
10.0 5970 5865 6075 1.8 0.4 4.8
15.0 4712 4641 4784 1.5 0.3 4.7
20.0 3747 3699 3795 1.3 0.3 4.5
25.0 3000 2970 3030 1.0 0.2 4.4
30.0 2417 2386 2448 1.3 0.3 4.3
35.0 1959 1930 1988 1.5 0.4 4.1
40.0 1598 1571 1625 1.7 0.4 4.0
45.0 1311 1286 1335 1.9 0.5 3.9
50.0 1081 1058 1103 2.1 0.5 3.8
55.0 895.9 875.5 916.2 2.3 0.6 3.7
60.0 746.4 728.1 764.7 2.5 0.7 3.6
65.0 624.9 608.5 641.4 2.6 0.8 3.5
70.0 525.6 510.9 540.3 2.8 0.8 3.4
75.0 444.4 431.2 457.6 3.0 0.9 3.3
80.0 377.4 365.6 389.2 3.1 1.0 3.2
85.0 321.7 311.1 332.3 3.3 1.0 3.2
90.0 275.3 265.8 284.8 3.4 1.1 3.1
95.0 236.6 228.1 245.1 3.6 1.2 3.0
100.0 204.0 196.4 211.6 3.7 1.3 2.9
105.0 176.6 169.7 183.4 3.9 1.4 2.9
110.0 153.4 147.2 159.5 4.0 1.4 2.8
115.0 133.6 128.1 139.2 4.2 1.5 2.7
120.0 116.8 111.8 121.8 4.3 1.6 2.7
125.0 102.5 97.99 107.0 4.4 1.7 2.6
130.0 90.27 86.18 94.36 4.5 1.8 2.5
135.0 79.63 75.93 83.34 4.7 1.9 2.5
140.0 70.44 67.08 73.80 4.8 2.0 2.4
145.0 62.50 59.44 65.55 4.9 2.1 2.4
150.0 55.59 52.81 58.37 5.0 2.2 2.3
155.0 49.60 47.07 52.14 5.1 2.3 2.3
Replacement IAT sensors can be purchased at your local "Autozone" type stores usually for ~$12. At least, I think that's what I paid for mine when I bought it a year or two back from Advance Auto.
