How to replace the crankshaft seal and harmonic balancer on 2012 Mazda 6?

Disconnect the negative battery, loosen front lugs, raise and support the vehicle, and remove the wheel, splash shield and drivebelt. Hold the harmonic balancer while removing its bolt, use a puller with adapter to remove the balancer, replace and lubricate the seal, reinstall parts, tighten lugs, reconnect battery, check for leaks.

Genuine 2012 Mazda 6 Crankshaft Seal

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3 Crankshaft Seals found

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2012 Mazda 6 Front Crank Seal Part Number: CY01-10-602
$14.86 MSRP: $19.82
You Save: $4.96 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Seal, Oil; Front Seal
- Position: Front
- Replaces: CY02-10-602, ZZJ1-10-602A, ZZJ1-10-602
- Item Weight: 0.60 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: CY01-10-602
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
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Fits the following 2012 Mazda 6 Submodels:
- S | 6 Cyl 3.7 L GAS
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2012 Mazda 6 Crankshaft Seal Part Number: L3G6-10-602
$9.45 MSRP: $12.61
You Save: $3.16 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Seal, Oil
- Position: Front
- Replaces: 1F20-10-602, 1F20-10-602A, LF01-10-602, L507-10-602
- Item Weight: 0.60 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: L3G6-10-602
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
More Info
Fits the following 2012 Mazda 6 Submodels:
- i, Mazdaspeed | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS
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2012 Mazda 6 Rear Main Seal Part Number: ZZJ1-11-399A
$40.16 MSRP: $53.56
You Save: $13.40 (26%)
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Product Specifications
- Other Name: Seal, Oil; Rear Seal
- Position: Rear
- Replaces: CY01-11-312B, CY01-11-312A, CY01-11-312, CY01-11-312C
- Item Weight: 0.60 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: ZZJ1-11-399A
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
More Info
Fits the following 2012 Mazda 6 Submodels:
- S | 6 Cyl 3.7 L GAS

2012 Mazda 6 Crankshaft Seal Parts and Q&A

Q: How to replace the crankshaft seal and harmonic balancer on 2012 Mazda 6?
A: Disconnect the negative battery, loosen front lugs, raise and support the vehicle, and remove the wheel, splash shield and drivebelt. Hold the harmonic balancer while removing its bolt, use a puller with adapter to remove the balancer, replace and lubricate the seal, reinstall parts, tighten lugs, reconnect battery, check for leaks.