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B58 coolant expansion tank (G05 X5 40i, high- or low-temp): what owners actually paid
B58 (3.0L turbo 6-cyl)
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Fair-price range (from sourced prices)
How this is derived: the middle 50% (25th–75th percentile) of the USD prices in the table below for that shop type, using full-job totals only. Labor-only, customer-supplied-parts, warranty cost-share, bundled-extra-work and non-USD prices are shown but excluded. A range is only published with at least 3 usable prices. Scope differs between quotes, so read the notes.
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G05 X5 40i, low-temperature (intercooler) tank
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Symptoms
- Low coolant warning, coming back after top-ups
- Dried pink/blue coolant crust or drips on or under the tank
- Sweet coolant smell after driving
- Cracked tank or leaking hose connection at the tank
- Low-temp tank only: charge-air (intercooler) circuit low-coolant message
Which cars are affected
G05 X5 xDrive40i (2019+); the same tanks are listed for the G06 X6 40i and G07 X7 40i
The G05 B58 has two separate coolant tanks, so check which one is leaking. The high-temperature tank (the larger one, engine cooling) is 17135A6A031, which replaced 17138610662. The low-temperature tank (for the intercooler/charge-air circuit) is 17138610661. Each is priced as its own job below. Coolant top-up and the cap are extra if needed.
→ High-temp tank 17135A6A031 (replaces 17138610662), G05/G06/G07 40i (BimmerWorld)
→ Low-temp tank 17138610661 fitment (BMW Parts Deal)
→ BimmerFest: B58 G05 X5 40i high- and low-temperature cooling circuits
Service bulletins
- SIB 17 06 17 Coolant expansion tank leak Coolant expansion tank leak on BMW G05/G06/G07/G11 and other models (2016–2023); BMW explains the cause and the approved repair. Service bulletin · Dec 2022
- SIB 17 03 20 Coolant line leak Coolant line leak on BMW G01/G02/G05/G07 and other models (2018–2020); BMW gives an inspection and repair procedure. Service bulletin · May 2020
BMW service bulletins and warranty extensions filed with NHTSA. A bulletin isn't a recall and doesn't mean your car has the problem. All service bulletins →
Sourced price points (1)
| Price | Shop | Vehicle / scope | Location | Year | Source |
|---|---|---|---|---|---|
| $975 | Dealer quote |
2012 X5 (E70) Coolant expansion tank, parts and labor · not used in range: older E70 X5, different tank |
NY area | ~2023 | Bimmerpost G05 |
Greyed rows are shown for context and excluded from the range. Years are approximate (date of the post).
Parts cross-reference
Genuine BMW part numbers cited in our parts-price sources for this job, checked against a public BMW parts catalog on 2026-10-17. "Supersedes" lists older numbers this part replaced. Confirm fitment for your VIN before ordering; numbers can differ by production date and drivetrain.
| BMW part number | Part | Supersedes | Search it at |
|---|---|---|---|
| 17 13 5 A6A 031 17135A6A031 | Expansion Tank | 17 13 8 610 662 | ECS Tuning · Turner · Pelican · FCP Euro |
| 17 13 8 610 661 17138610661 | Coolant Expansion Tank Expansion Tank | none listed | ECS Tuning · Turner · Pelican · FCP Euro |
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Before you pay: check your VIN for recalls
Some failures are covered by a safety recall or a warranty extension. Our free recall check lists NHTSA recalls for your car's model and year.
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