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1989 Mercedes Benz 420SEL Base Sedan 126.035 V8 4.2L

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Your Vehicle 1989 Mercedes Benz 420SEL Base Sedan 126.035 V8 4.2L
Your Vehicle 1989 Mercedes Benz 420SEL Base Sedan 126.035 V8 4.2L
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1989 Mercedes Benz 420SEL Base Sedan 126.035 V8 4.2L Cooling Expansion Tank Parts

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Coolant Level Sensor

ES#1654747 - 1245400244 - Coolant Level Sensor - Located on expansion tank - Genuine Mercedes Benz - Mercedes Benz

Located on expansion tank affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Mercedes Benz - Corporate Logo
ES#:
1654747
Mfg#:
1245400244
Ships in 4 Business Days
7% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$45.00

This product was last offered at the strikethrough price on
01-06-2026

$41.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#1663830 - 1265001549 - Coolant Expansion Tank - Coolant level sensor and cap not included - Genuine Mercedes Benz - Mercedes Benz

Coolant level sensor and cap not included affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Mercedes Benz - Corporate Logo
ES#:
1663830
Mfg#:
1265001549
In Stock
8% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$37.99

This product was last offered at the strikethrough price on
01-06-2026

$34.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Level Sensor

ES#2867699 - 1245400244 - Coolant Level Sensor - Located on expansion tank - Febi - Mercedes Benz

Located on expansion tank affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2867699
Mfg#:
1245400244
In Stock at Vendor
$11.19

This product was last offered at the strikethrough price on
05-29-2026

$9.90 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#1654551 - 1245000406 - Expansion Tank Cap - Includes new seal - Genuine Mercedes Benz - Mercedes Benz

Includes new seal affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Mercedes Benz - Corporate Logo
ES#:
1654551
Mfg#:
1245000406
In Stock at Vendor
$24.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#2533942 - 1265001549 - Coolant Expansion Tank - Coolant level sensor and cap not included - URO - Mercedes Benz

Coolant level sensor and cap not included affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2533942
Mfg#:
1265001549
Ships in 2 Business Days
$39.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#4327456 - 1245000406 - Expansion Tank Cap - Includes new seal - Meyle - Mercedes Benz

Includes new seal affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
4327456
Mfg#:
1245000406
Ships in 5 Business Days
$7.99

This product was last offered at the strikethrough price on
03-01-2026

$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2533938 - 1245000406 - Expansion Tank Cap - Includes new seal - URO - Mercedes Benz

Includes new seal affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2533938
Mfg#:
1245000406
Ships in 2 Business Days
$7.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Level Sensor

ES#2534070 - 1245400244 - Coolant Level Sensor - Located on expansion tank - URO - Mercedes Benz

Located on expansion tank affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2534070
Mfg#:
1245400244
Ships in 2 Business Days
$12.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2607869 - 1245000406 - Expansion Tank Cap - Includes new seal - Reutter - Mercedes Benz

Includes new seal affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Reutter - Corporate Logo
ES#:
2607869
Mfg#:
1245000406
Back Ordered
$13.99

This product was last offered at the strikethrough price on
05-07-2026

$12.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2801776 - 1245000406 - Expansion Tank Cap - Includes new seal - Rein - Mercedes Benz

Includes new seal affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2801776
Mfg#:
1245000406
Ships in 4 Business Days
$8.15 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2813745 - 1245000406 - Expansion Tank Cap - Includes new seal - Hamburg Tech - Mercedes Benz

Includes new seal affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2813745
Mfg#:
1245000406
Ships in 2 Business Days
$7.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2873927 - 1245000406 - Expansion Tank Cap - Includes new seal - Febi - Mercedes Benz

Includes new seal affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2873927
Mfg#:
1245000406
Ships on Jul 6, 2026
$7.29

This product was last offered at the strikethrough price on
05-29-2026

$6.45 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

O-RING 14.5 X 3 BLACK VITON

ES#2801403 - 129970348 - O-RING 14.5 X 3 BLACK VITON - Rein - Mercedes Benz

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2801403
Mfg#:
129970348
Back Ordered
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

O-Ring - Priced Each

ES#1621651 - 0129970348 - O-Ring - Priced Each - Coolant level sensor to expansion tank - Genuine Mercedes Benz - Mercedes Benz

Coolant level sensor to expansion tank affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Mercedes Benz - Corporate Logo
ES#:
1621651
Mfg#:
0129970348
Ships in 4 Business Days
$3.99

This product was last offered at the strikethrough price on
01-06-2026

$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Plug Kit

ES#4642719 - 1265000084 - Expansion Tank Plug Kit - Includes Plastic Plug, O-ring & Snap Ring - URO - Mercedes Benz

Includes Plastic Plug, O-ring & Snap Ring affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
4642719
Mfg#:
1265000084
Ships in 2 Business Days
$8.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#2762985 - 1265001549 - Coolant Expansion Tank - Coolant level sensor and cap not included - Meyle - Mercedes Benz

Coolant level sensor and cap not included affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
2762985
Mfg#:
1265001549
Ships in 1-2 days
$35.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Cooling Expansion Tank Parts

A common source of overheating problems is a broken or leaking coolant expansion tank. Replace it with an OEM coolant expansion tank or quality aftermarket expansion tank to prevent future woes.

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Manufacturer names and/or part numbers are used only for identification purposes.

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