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B46/B48 Turbo Coolant Return Line cost
B46/B48 Turbo Coolant Return Line on a BMW with the B46/B48 engine typically costs $801 at a BMW dealer or $77–$107 in parts DIY, based on 3 real owner-reported prices.
Last updated · Sources: 3 owner-reported prices from 4 cited threads
Leaking turbo coolant return line on the 2.0L four-cylinder. Real prices reported by owners on Reddit and BMW forums, with a link to every one.
Limited data: One real installed price (dealer) plus two published part prices.
Typical cost
Ranges are the lowest and highest prices in the table below. They are not estimates. Shop prices include parts and labor unless noted.
Every price we found
| Price | Where | Details | Source |
|---|---|---|---|
| $801 | Dealer | Dealer quote, turbo coolant return line ($801.42), 2018 G01 X3 | [1] |
| $107 | DIY | Genuine BMW return line, FCP Euro ($106.93) | [2] |
| $77 | DIY | Rein Automotive return line, Pelican Parts ($77.25) | [3] |
- One DIYer bought the two O-rings from a BMW dealer for about $14.
- Expect several cups of coolant to spill when the line comes off at the thermostat end.
How long it takes
DIYers in the source thread describe it as tight, wiggle-it-out work; replace the O-rings on both feed and return lines.
Which cars are affected
330i/430i/230i (F3x/F2x), 530i (G30), X3 xDrive30i / X4 xDrive30i (G01/G02). The return line usually leaks at its rubber section or connections; the feed line sits on top and has to come out first.
Symptoms
- Slow coolant loss / low coolant warning
- Crusty coolant residue around the turbo lines
- Coolant puddle under the front of the car
Parts list
| Turbo coolant return line 11538854735 | ECS TuningPelican PartsAmazon |
| Feed/return line O-rings | ECS TuningPelican PartsAmazon |
| BMW coolant | ECS TuningPelican PartsAmazon |
Check fitment for your exact car (VIN) before ordering. Links may become affiliate links in the future.
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Common questions
How much does B46/B48 Turbo Coolant Return Line cost?
B46/B48 Turbo Coolant Return Line on a BMW with the B46/B48 engine typically costs $801 at a BMW dealer or $77–$107 in parts DIY, based on 3 real owner-reported prices.
How much does B46/B48 Turbo Coolant Return Line cost at a BMW dealer?
Real dealer prices we found ranged $801 (1 data point, median $801).
How much does an independent shop charge for B46/B48 Turbo Coolant Return Line?
We have not found a real independent shop price for this job yet.
Can I do B46/B48 Turbo Coolant Return Line myself?
Owners who did it themselves reported $77 to $107 in parts and tools.
How long does B46/B48 Turbo Coolant Return Line take?
DIYers in the source thread describe it as tight, wiggle-it-out work; replace the O-rings on both feed and return lines.
Which BMWs are affected?
330i/430i/230i (F3x/F2x), 530i (G30), X3 xDrive30i / X4 xDrive30i (G01/G02). The return line usually leaks at its rubber section or connections; the feed line sits on top and has to come out first.
Related repairs
Related guides
- BMW X3 vs X5: Repairs Owners Report
- BMW X3 G01 Buying Guide: What It Costs to Fix
- BMW F30 3 Series Buying Guide: What It Costs to Fix
- BMW B46 and B48 Common Problems and Repair Costs
- BMW Coolant Leak: Common Causes by Engine
Sources
- What Should I Tackle First? (2018 X3, dealer quote) (X3 Bimmerpost)
- Genuine BMW Turbocharger Coolant Return Line 11538854735 (FCP Euro)
- Turbocharger Coolant Line 11538854735 (Rein CHT0898) (Pelican Parts)
- B48 Turbo Coolant line replacement (F30 Bimmerpost)
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