Should I check the MOT history before buying a 2021 Fiat 500 Rockstar MHEV?

Yes. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. A full MOT history analysis will highlight patterns that a single test result won't reveal.

What corrosion should I look for when inspecting a 2021 Fiat 500 Rockstar MHEV?

Check brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that is expensive to fix and can fail an MOT.

How are tyres and brakes typically on a 2021 Fiat 500 Rockstar MHEV?

Tyres and brakes are the most common advisory items on vehicles of this age. Budget for replacement if they are near the limit, and factor this into your offer price.

Is the 2021 Fiat 500 Rockstar MHEV reliable?

Based on MOT data from 592 vehicles, the 2021 Fiat 500 Rockstar MHEV has a first-time MOT pass rate of 91.2%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

Do I need an HPI check when buying a 2021 Fiat 500 Rockstar MHEV?

Yes. The MOT history will not show outstanding finance, insurance write-offs, or stolen status. An HPI check covers these areas and should be part of any used car purchase.

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Fiat 500 Rockstar MHEV (2021)

592 real MOT outcomes analysed • 91.2% first-time pass rate

2021 Fiat 500 Rockstar MHEV

CarHunch analysed 592 real MOT records for the 2021 Fiat 500 Rockstar MHEV. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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AI Analysis Reliability Overview Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution MOT Averages Colour Breakdown Compare Models

The 2021 FIAT 500 ROCKSTAR MHEV is a reliable performer, with an 89.7% first-time MOT pass rate that sits comfortably above the UK average of 80%, and only 11.3% of vehicles have ever recorded a dangerous defect—well below the threshold for concern. The petrol variant (which makes up virtually all the cohort) maintains a 89.5% pass rate with no notable weakness.

At just over 25,000 miles on the clock, these cars are lightly driven for their age, which partly explains the strong pass rate, but the real test comes in the failure pattern: averaging only 0.27 failures per vehicle suggests the hybrid powertrain isn't throwing curveballs, though 1.3 advisories per car indicates minor wear items are beginning to accumulate. If you're considering one, check the service history carefully and budget for routine maintenance, but don't expect expensive surprises early on.

The 2021 Fiat 500 Rockstar MHEV passes its MOT first time more often than most UK vehicles (91.2% vs ~80% average) — and when it does fail, it's usually something minor and cheap to fix.

⚠️ About 1 in 12 of these vehicles have had a dangerous MOT failure at some point — usually tyres or brakes, and often a one-off issue rather than a persistent problem. The group stats won't tell you which one you're looking at.

First-time pass

91.2%

UK average ~80%

Better than average

Dangerous (ever)

11.3%

At least once in MOT history

Check this vehicle

Avg failures / car

0.27

Over 2.4 tests on record

Low

Typical mileage

25k

Middle half: 15k–36k

For context

✅ Good baseline reliability. A 91.2% first-time pass rate puts this well above the UK average — it's a well-sorted vehicle in this age bracket.

🔍 The dangerous defect figure is real. Most are one-off tyre failures or brake issues — not structural problems. But it's exactly why checking the individual vehicle's history is essential, not optional.

These stats describe 592 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.

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See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 592 Fiat 500 Rockstar MHEV cars.

Before you buy a 2021 Fiat 500 Rockstar MHEV

Based on MOT data from 592 vehicles — here's what to check.

📋 Check the full MOT history. 11.3% of these vehicles have had a dangerous defect recorded - recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle.
🔍 Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price. Inspection →
📄 Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically. History Get 20% off via CarHunch

Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Petrol (97%)	576	91.1%	0.28

Colour Breakdown

Based on 1,006 Fiat 500 Rockstar MHEV vehicles registered in the UK — across all years. From DVLA registration records.

Grey 45%

453

White 23.9%

240

Black 23.4%

235

Green 4.4%

Red 2.2%

Blue 1.2%

Mileage Distribution

Most 2021 Fiat 500 Rockstar MHEV vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.

25,359

typical

15,162

low mileage

35,761

high mileage

Half of all 2021 Fiat 500 Rockstar MHEV vehicles fall between 15,162 and 35,761 miles.

Is the mileage you're seeing normal?

✓ Under 15,162 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.

✓ 15,162–35,761 miles — normal for age. This is where most 2021 Fiat 500 Rockstar MHEVs sit.

⚠ Over 48,277 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

MOT History Averages

2.4

Avg MOT tests per vehicle

0.27

Avg failures per vehicle

1.3

Avg advisories per vehicle

Other model years — Fiat 500 Rockstar MHEV: All 500 Rockstar MHEV years → Which year to buy? →

2020

Or browse all models: Fiat →

Compare with another model

See how the 2021 Fiat 500 Rockstar MHEV stacks up against a rival.

A solid choice — agree?