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2021 Range Rover Sport — brake fluid is old but still looks clean

CleanBuyer879Community StarterJul 14, 20262021 Range Rover Sport HSEFlorida
2021 Range Rover Sport HSE, about 37,000 miles. Fluid looks clear in the reservoir but has been in the car for several years. Would you change based on time/moisture rather than appearance?
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11 replies

TowTraveler350Community StarterCommunity StarterJul 14, 2026permalink
If it were in my driveway, write temp, speed, and in-gear vs coast when the 2021 Range Rover Sport does it — then decide on parts. If the cheap test changes it, stop and reassess. That's the sequence I'd use. If that fails I'll eat the diagnostic fee.
DieselCommuter129Community StarterCommunity StarterJul 14, 2026permalink
Start with the test that can prove you wrong. Move a coil or plug on the 2021 Range Rover Sport if it's cylinder-specific and see whether the code follows. Don't erase codes until someone who can help has seen them. A shop burned me once by skipping that step. I'd rather look cautious in this thread than stuck later.
CleanBuyer879Community StarterCommunity StarterJul 14, 2026permalink
Cleared nothing. I want service to see the alert on the 2021 Range Rover Sport first. I refuse to clear codes until someone else sees them.
UsedCarNerdCommunity StarterCommunity StarterJul 14, 2026permalink
Ask what changed right before it started. If a shop can't duplicate it on the 2021 Range Rover Sport, bring a video plus freeze-frame data, not just a story. Save the big job until that test fails. This is from a 2021 Range Rover Sport in Florida with 37,000 miles. Just my two cents from doing this recently. Make the next action something you can finish this week. Video is ugly but it shows the hesitation.
HybridHauler726Community StarterCommunity StarterJul 16, 2026permalink
Agree — and I'd add this: Move a coil or plug on the 2021 Range Rover Sport if it's cylinder-specific and see whether the code follows. You'll know quickly if you're on the wrong tree. On “brake fluid is old but still looks,” that was the fork that mattered for me. That's the whole play. I keep a notes app thread for this now.
ProjectNomad264Community StarterCommunity StarterJul 16, 2026permalink
That's a good start, but I wouldn't stop there. Move a coil or plug on the 2021 Range Rover Sport if it's cylinder-specific and see whether the code follows. That's the branch I'd chase this week. This is from a 2021 Range Rover Sport in Florida with 37,000 miles. Write the result down so the next test isn't a repeat of the last one. Make the next action something you can finish this week. I'll update if anything new shows up.
ProjectNomad264Community StarterCommunity StarterJul 14, 2026permalink
Intermittent stuff lies if you only catch it once. A pressure test beats staring at a dry driveway if the 2021 Range Rover Sport is losing coolant with no puddle. You'll know quickly if you're on the wrong tree. On “brake fluid is old but still looks,” that was the fork that mattered for me. Write the result down so the next test isn't a repeat of the last one. This is the filter I use when the thread starts repeating itself. Only after sitting overnight so far.
UsedCarNerdCommunity StarterCommunity StarterJul 14, 2026permalink
I wouldn't throw parts yet. If a shop can't duplicate it on the 2021 Range Rover Sport, bring a video plus freeze-frame data, not just a story. You'll know quickly if you're on the wrong tree. Just my two cents from doing this recently. Your commute and mine probably aren't the same, but the test still applies. This is me being the wet blanket on purpose.
TrackBuilderCommunity StarterCommunity StarterJul 15, 2026permalink
I'd want a measurement, not a hunch. Get a real battery/charging test on the 2021 Range Rover Sport, not just resting voltage, before blaming a module. You'll know quickly if you're on the wrong tree. Take it or leave it — that's what I'd do. Not trying to scare you — just skip the expensive first guess. Happens in gear, not in park, for what that's worth.
CommuterWrench707Community StarterCommunity StarterJul 15, 2026permalink
This is usually cheaper to test than to guess. Write temp, speed, and in-gear vs coast when the 2021 Range Rover Sport does it — then decide on parts. Don't erase codes until someone who can help has seen them. Post the numbers (or the code) and people can get more specific. Only after sitting overnight so far.
UsedCarNerdCommunity StarterCommunity StarterJul 15, 2026permalink
Fair point. Counterpoint: Move a coil or plug on the 2021 Range Rover Sport if it's cylinder-specific and see whether the code follows. That's the branch I'd chase this week. Just my two cents from doing this recently. Not interested in a five-hour wait for a shrug.
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